./Ultimate.py --spec /mnt/thread-witnesses/replication/bench/thread-witnesses/st-lit/properties/unreach-call.prp --file /mnt/thread-witnesses/replication/bench/thread-witnesses/st-lit/prec/hh-ex1b.i --full-output --architecture 64bit


--------------------------------------------------------------------------------


Checking for ERROR reachability
Using default analysis
Version 2329fc70
Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/mnt/thread-witnesses/replication/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /mnt/thread-witnesses/replication/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /mnt/thread-witnesses/replication/UAutomizer-linux/data -tc /mnt/thread-witnesses/replication/UAutomizer-linux/config/AutomizerReach.xml -i /mnt/thread-witnesses/replication/bench/thread-witnesses/st-lit/prec/hh-ex1b.i -s /mnt/thread-witnesses/replication/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /mnt/thread-witnesses/replication/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) )

 --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 7ce79fe11836d82ec064e02fff135ad9866417774e7d276b3384b4d4dde863b5
--- Real Ultimate output ---
This is Ultimate 0.2.2-dev-2329fc7
[2023-01-31 11:34:40,296 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-01-31 11:34:40,298 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2023-01-31 11:34:40,340 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2023-01-31 11:34:40,341 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-01-31 11:34:40,343 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-01-31 11:34:40,344 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-01-31 11:34:40,346 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2023-01-31 11:34:40,347 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2023-01-31 11:34:40,351 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-01-31 11:34:40,352 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2023-01-31 11:34:40,353 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2023-01-31 11:34:40,353 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2023-01-31 11:34:40,355 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2023-01-31 11:34:40,356 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2023-01-31 11:34:40,357 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-01-31 11:34:40,358 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-01-31 11:34:40,358 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-01-31 11:34:40,359 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2023-01-31 11:34:40,378 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2023-01-31 11:34:40,380 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2023-01-31 11:34:40,381 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2023-01-31 11:34:40,382 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2023-01-31 11:34:40,383 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2023-01-31 11:34:40,388 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2023-01-31 11:34:40,388 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2023-01-31 11:34:40,389 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2023-01-31 11:34:40,390 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2023-01-31 11:34:40,390 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2023-01-31 11:34:40,391 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2023-01-31 11:34:40,391 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2023-01-31 11:34:40,392 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2023-01-31 11:34:40,393 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2023-01-31 11:34:40,394 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2023-01-31 11:34:40,394 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2023-01-31 11:34:40,395 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2023-01-31 11:34:40,395 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2023-01-31 11:34:40,395 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2023-01-31 11:34:40,396 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2023-01-31 11:34:40,396 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2023-01-31 11:34:40,397 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-01-31 11:34:40,397 INFO  L101        SettingsManager]: Beginning loading settings from /mnt/thread-witnesses/replication/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-01-31 11:34:40,439 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-01-31 11:34:40,439 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-01-31 11:34:40,440 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-01-31 11:34:40,440 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-01-31 11:34:40,441 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-01-31 11:34:40,441 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-01-31 11:34:40,441 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-01-31 11:34:40,442 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2023-01-31 11:34:40,442 INFO  L138        SettingsManager]:  * Use SBE=true
[2023-01-31 11:34:40,442 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-01-31 11:34:40,443 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-01-31 11:34:40,443 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-01-31 11:34:40,443 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-01-31 11:34:40,443 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-01-31 11:34:40,443 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-01-31 11:34:40,444 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-01-31 11:34:40,444 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-01-31 11:34:40,444 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-01-31 11:34:40,444 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-01-31 11:34:40,450 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-01-31 11:34:40,451 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-01-31 11:34:40,451 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-01-31 11:34:40,451 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-01-31 11:34:40,452 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-01-31 11:34:40,452 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-01-31 11:34:40,452 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-01-31 11:34:40,452 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-01-31 11:34:40,452 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-01-31 11:34:40,453 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-01-31 11:34:40,453 INFO  L138        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-01-31 11:34:40,453 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-01-31 11:34:40,453 INFO  L138        SettingsManager]:  * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC
[2023-01-31 11:34:40,454 INFO  L138        SettingsManager]:  * Looper check in Petri net analysis=SEMANTIC
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/mnt/thread-witnesses/replication/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /mnt/thread-witnesses/replication/UAutomizer-linux
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )


Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ce79fe11836d82ec064e02fff135ad9866417774e7d276b3384b4d4dde863b5
[2023-01-31 11:34:40,805 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-01-31 11:34:40,828 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-01-31 11:34:40,841 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-01-31 11:34:40,842 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-01-31 11:34:40,842 INFO  L275        PluginConnector]: CDTParser initialized
[2023-01-31 11:34:40,843 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /mnt/thread-witnesses/replication/bench/thread-witnesses/st-lit/prec/hh-ex1b.i
[2023-01-31 11:34:42,398 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-01-31 11:34:42,698 INFO  L351              CDTParser]: Found 1 translation units.
[2023-01-31 11:34:42,699 INFO  L172              CDTParser]: Scanning /mnt/thread-witnesses/replication/bench/thread-witnesses/st-lit/prec/hh-ex1b.i
[2023-01-31 11:34:42,703 INFO  L394              CDTParser]: About to delete temporary CDT project at /mnt/thread-witnesses/replication/UAutomizer-linux/data/459bbc06a/23fed15da7664a20abcff186a5cf70f7/FLAG14aa250e8
[2023-01-31 11:34:42,730 INFO  L402              CDTParser]: Successfully deleted /mnt/thread-witnesses/replication/UAutomizer-linux/data/459bbc06a/23fed15da7664a20abcff186a5cf70f7
[2023-01-31 11:34:42,732 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-01-31 11:34:42,733 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-01-31 11:34:42,735 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-01-31 11:34:42,735 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-01-31 11:34:42,737 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-01-31 11:34:42,738 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:34:42" (1/1) ...
[2023-01-31 11:34:42,738 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a1b9318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:34:42, skipping insertion in model container
[2023-01-31 11:34:42,739 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:34:42" (1/1) ...
[2023-01-31 11:34:42,743 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-01-31 11:34:42,773 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-01-31 11:34:42,958 WARN  L237   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /mnt/thread-witnesses/replication/bench/thread-witnesses/st-lit/prec/hh-ex1b.i[800,813]
[2023-01-31 11:34:42,965 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2023-01-31 11:34:42,984 INFO  L203         MainTranslator]: Completed pre-run
[2023-01-31 11:34:43,013 WARN  L237   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /mnt/thread-witnesses/replication/bench/thread-witnesses/st-lit/prec/hh-ex1b.i[800,813]
[2023-01-31 11:34:43,015 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2023-01-31 11:34:43,036 INFO  L208         MainTranslator]: Completed translation
[2023-01-31 11:34:43,037 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:34:43 WrapperNode
[2023-01-31 11:34:43,037 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-01-31 11:34:43,042 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-01-31 11:34:43,043 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-01-31 11:34:43,043 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2023-01-31 11:34:43,049 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:34:43" (1/1) ...
[2023-01-31 11:34:43,068 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:34:43" (1/1) ...
[2023-01-31 11:34:43,093 INFO  L138                Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 31
[2023-01-31 11:34:43,093 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-01-31 11:34:43,094 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-01-31 11:34:43,094 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-01-31 11:34:43,094 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-01-31 11:34:43,101 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:34:43" (1/1) ...
[2023-01-31 11:34:43,108 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:34:43" (1/1) ...
[2023-01-31 11:34:43,109 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:34:43" (1/1) ...
[2023-01-31 11:34:43,109 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:34:43" (1/1) ...
[2023-01-31 11:34:43,111 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:34:43" (1/1) ...
[2023-01-31 11:34:43,113 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:34:43" (1/1) ...
[2023-01-31 11:34:43,114 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:34:43" (1/1) ...
[2023-01-31 11:34:43,114 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:34:43" (1/1) ...
[2023-01-31 11:34:43,117 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-01-31 11:34:43,121 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-01-31 11:34:43,127 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-01-31 11:34:43,128 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-01-31 11:34:43,129 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:34:43" (1/1) ...
[2023-01-31 11:34:43,133 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-01-31 11:34:43,149 INFO  L189       MonitoredProcess]: No working directory specified, using /mnt/thread-witnesses/replication/UAutomizer-linux/z3
[2023-01-31 11:34:43,164 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /mnt/thread-witnesses/replication/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-01-31 11:34:43,226 INFO  L327       MonitoredProcess]: [MP /mnt/thread-witnesses/replication/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-01-31 11:34:43,256 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-01-31 11:34:43,256 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-01-31 11:34:43,256 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-01-31 11:34:43,256 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-01-31 11:34:43,257 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2023-01-31 11:34:43,257 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2023-01-31 11:34:43,326 INFO  L235             CfgBuilder]: Building ICFG
[2023-01-31 11:34:43,345 INFO  L261             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-01-31 11:34:43,528 INFO  L276             CfgBuilder]: Performing block encoding
[2023-01-31 11:34:43,534 INFO  L295             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-01-31 11:34:43,535 INFO  L300             CfgBuilder]: Removed 2 assume(true) statements.
[2023-01-31 11:34:43,537 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:34:43 BoogieIcfgContainer
[2023-01-31 11:34:43,537 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-01-31 11:34:43,551 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-01-31 11:34:43,551 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-01-31 11:34:43,554 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-01-31 11:34:43,554 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 11:34:42" (1/3) ...
[2023-01-31 11:34:43,556 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@712099fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:34:43, skipping insertion in model container
[2023-01-31 11:34:43,556 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:34:43" (2/3) ...
[2023-01-31 11:34:43,557 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@712099fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:34:43, skipping insertion in model container
[2023-01-31 11:34:43,558 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:34:43" (3/3) ...
[2023-01-31 11:34:43,559 INFO  L112   eAbstractionObserver]: Analyzing ICFG hh-ex1b.i
[2023-01-31 11:34:43,579 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-01-31 11:34:43,579 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-01-31 11:34:43,668 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-01-31 11:34:43,682 INFO  L357      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@69566b68, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=<UNSUPPORTED>, UseSemiCommutativity=<UNSUPPORTED>, Solver=<NOT_USED>, SolverTimeout=<NOT_USED>]
[2023-01-31 11:34:43,682 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-01-31 11:34:43,685 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 19 states, 12 states have (on average 1.5) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2023-01-31 11:34:43,690 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8
[2023-01-31 11:34:43,697 INFO  L187           NwaCegarLoop]: Found error trace
[2023-01-31 11:34:43,697 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1]
[2023-01-31 11:34:43,698 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-01-31 11:34:43,704 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2023-01-31 11:34:43,704 INFO  L85        PathProgramCache]: Analyzing trace with hash 1809995095, now seen corresponding path program 1 times
[2023-01-31 11:34:43,717 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-01-31 11:34:43,721 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762258716]
[2023-01-31 11:34:43,722 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-01-31 11:34:43,722 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-01-31 11:34:43,818 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-01-31 11:34:43,949 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-01-31 11:34:43,950 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-01-31 11:34:43,950 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762258716]
[2023-01-31 11:34:43,950 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762258716] provided 1 perfect and 0 imperfect interpolant sequences
[2023-01-31 11:34:43,951 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-01-31 11:34:43,951 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-01-31 11:34:43,952 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347756536]
[2023-01-31 11:34:43,953 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-01-31 11:34:43,955 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-01-31 11:34:43,976 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-01-31 11:34:44,045 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-01-31 11:34:44,046 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-01-31 11:34:44,052 INFO  L87              Difference]: Start difference. First operand  has 19 states, 12 states have (on average 1.5) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand  has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-01-31 11:34:44,135 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-01-31 11:34:44,136 INFO  L93              Difference]: Finished difference Result 41 states and 67 transitions.
[2023-01-31 11:34:44,137 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-01-31 11:34:44,138 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7
[2023-01-31 11:34:44,138 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-01-31 11:34:44,143 INFO  L225             Difference]: With dead ends: 41
[2023-01-31 11:34:44,156 INFO  L226             Difference]: Without dead ends: 20
[2023-01-31 11:34:44,159 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-01-31 11:34:44,173 INFO  L413           NwaCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-01-31 11:34:44,174 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 40 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-01-31 11:34:44,193 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20 states.
[2023-01-31 11:34:44,233 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16.
[2023-01-31 11:34:44,234 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 16 states, 10 states have (on average 1.3) internal successors, (13), 12 states have internal predecessors, (13), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2023-01-31 11:34:44,236 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions.
[2023-01-31 11:34:44,238 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 7
[2023-01-31 11:34:44,240 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-01-31 11:34:44,241 INFO  L495      AbstractCegarLoop]: Abstraction has 16 states and 20 transitions.
[2023-01-31 11:34:44,242 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-01-31 11:34:44,242 INFO  L276                IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions.
[2023-01-31 11:34:44,243 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2023-01-31 11:34:44,243 INFO  L187           NwaCegarLoop]: Found error trace
[2023-01-31 11:34:44,244 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1]
[2023-01-31 11:34:44,244 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-01-31 11:34:44,245 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-01-31 11:34:44,245 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2023-01-31 11:34:44,246 INFO  L85        PathProgramCache]: Analyzing trace with hash 300592543, now seen corresponding path program 1 times
[2023-01-31 11:34:44,246 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-01-31 11:34:44,246 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636443783]
[2023-01-31 11:34:44,246 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-01-31 11:34:44,247 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-01-31 11:34:44,264 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-01-31 11:34:44,339 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-01-31 11:34:44,339 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-01-31 11:34:44,340 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636443783]
[2023-01-31 11:34:44,341 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636443783] provided 1 perfect and 0 imperfect interpolant sequences
[2023-01-31 11:34:44,341 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-01-31 11:34:44,341 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-01-31 11:34:44,341 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473496346]
[2023-01-31 11:34:44,341 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-01-31 11:34:44,347 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-01-31 11:34:44,347 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-01-31 11:34:44,348 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-01-31 11:34:44,348 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-01-31 11:34:44,349 INFO  L87              Difference]: Start difference. First operand 16 states and 20 transitions. Second operand  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-01-31 11:34:44,383 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-01-31 11:34:44,383 INFO  L93              Difference]: Finished difference Result 30 states and 39 transitions.
[2023-01-31 11:34:44,384 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-01-31 11:34:44,384 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8
[2023-01-31 11:34:44,384 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-01-31 11:34:44,385 INFO  L225             Difference]: With dead ends: 30
[2023-01-31 11:34:44,385 INFO  L226             Difference]: Without dead ends: 17
[2023-01-31 11:34:44,385 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-01-31 11:34:44,386 INFO  L413           NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-01-31 11:34:44,387 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-01-31 11:34:44,393 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 17 states.
[2023-01-31 11:34:44,399 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17.
[2023-01-31 11:34:44,400 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 17 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2023-01-31 11:34:44,402 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions.
[2023-01-31 11:34:44,402 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 8
[2023-01-31 11:34:44,402 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-01-31 11:34:44,402 INFO  L495      AbstractCegarLoop]: Abstraction has 17 states and 21 transitions.
[2023-01-31 11:34:44,403 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-01-31 11:34:44,403 INFO  L276                IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions.
[2023-01-31 11:34:44,405 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2023-01-31 11:34:44,405 INFO  L187           NwaCegarLoop]: Found error trace
[2023-01-31 11:34:44,407 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1]
[2023-01-31 11:34:44,408 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-01-31 11:34:44,409 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-01-31 11:34:44,409 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2023-01-31 11:34:44,410 INFO  L85        PathProgramCache]: Analyzing trace with hash 302380003, now seen corresponding path program 1 times
[2023-01-31 11:34:44,413 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-01-31 11:34:44,414 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87305751]
[2023-01-31 11:34:44,414 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-01-31 11:34:44,415 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-01-31 11:34:44,444 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-01-31 11:34:44,619 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-01-31 11:34:44,620 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-01-31 11:34:44,620 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87305751]
[2023-01-31 11:34:44,620 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87305751] provided 1 perfect and 0 imperfect interpolant sequences
[2023-01-31 11:34:44,621 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-01-31 11:34:44,621 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2023-01-31 11:34:44,622 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153357449]
[2023-01-31 11:34:44,622 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-01-31 11:34:44,622 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-01-31 11:34:44,623 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-01-31 11:34:44,627 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-01-31 11:34:44,628 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2023-01-31 11:34:44,628 INFO  L87              Difference]: Start difference. First operand 17 states and 21 transitions. Second operand  has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-01-31 11:34:44,724 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-01-31 11:34:44,724 INFO  L93              Difference]: Finished difference Result 37 states and 47 transitions.
[2023-01-31 11:34:44,725 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-01-31 11:34:44,725 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8
[2023-01-31 11:34:44,725 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-01-31 11:34:44,725 INFO  L225             Difference]: With dead ends: 37
[2023-01-31 11:34:44,726 INFO  L226             Difference]: Without dead ends: 23
[2023-01-31 11:34:44,726 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2023-01-31 11:34:44,727 INFO  L413           NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-01-31 11:34:44,732 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 64 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-01-31 11:34:44,733 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23 states.
[2023-01-31 11:34:44,737 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23.
[2023-01-31 11:34:44,738 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 23 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2023-01-31 11:34:44,740 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions.
[2023-01-31 11:34:44,740 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 8
[2023-01-31 11:34:44,741 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-01-31 11:34:44,741 INFO  L495      AbstractCegarLoop]: Abstraction has 23 states and 27 transitions.
[2023-01-31 11:34:44,741 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-01-31 11:34:44,742 INFO  L276                IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions.
[2023-01-31 11:34:44,742 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2023-01-31 11:34:44,742 INFO  L187           NwaCegarLoop]: Found error trace
[2023-01-31 11:34:44,742 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-01-31 11:34:44,742 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-01-31 11:34:44,743 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-01-31 11:34:44,743 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2023-01-31 11:34:44,743 INFO  L85        PathProgramCache]: Analyzing trace with hash -1884839010, now seen corresponding path program 1 times
[2023-01-31 11:34:44,744 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-01-31 11:34:44,744 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34673002]
[2023-01-31 11:34:44,744 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-01-31 11:34:44,744 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-01-31 11:34:44,762 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-01-31 11:34:44,931 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4
[2023-01-31 11:34:44,934 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-01-31 11:34:44,937 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2023-01-31 11:34:44,955 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-01-31 11:34:44,956 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34673002]
[2023-01-31 11:34:44,956 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34673002] provided 1 perfect and 0 imperfect interpolant sequences
[2023-01-31 11:34:44,956 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-01-31 11:34:44,956 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-01-31 11:34:44,956 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512732132]
[2023-01-31 11:34:44,957 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-01-31 11:34:44,957 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-01-31 11:34:44,957 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-01-31 11:34:44,958 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-01-31 11:34:44,959 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-01-31 11:34:44,959 INFO  L87              Difference]: Start difference. First operand 23 states and 27 transitions. Second operand  has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-01-31 11:34:45,017 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-01-31 11:34:45,018 INFO  L93              Difference]: Finished difference Result 29 states and 32 transitions.
[2023-01-31 11:34:45,018 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-01-31 11:34:45,018 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14
[2023-01-31 11:34:45,019 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-01-31 11:34:45,019 INFO  L225             Difference]: With dead ends: 29
[2023-01-31 11:34:45,019 INFO  L226             Difference]: Without dead ends: 27
[2023-01-31 11:34:45,020 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2023-01-31 11:34:45,021 INFO  L413           NwaCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-01-31 11:34:45,024 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 44 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-01-31 11:34:45,024 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 27 states.
[2023-01-31 11:34:45,028 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27.
[2023-01-31 11:34:45,037 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2023-01-31 11:34:45,038 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions.
[2023-01-31 11:34:45,038 INFO  L78                 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 14
[2023-01-31 11:34:45,038 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-01-31 11:34:45,038 INFO  L495      AbstractCegarLoop]: Abstraction has 27 states and 30 transitions.
[2023-01-31 11:34:45,038 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-01-31 11:34:45,039 INFO  L276                IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions.
[2023-01-31 11:34:45,039 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2023-01-31 11:34:45,039 INFO  L187           NwaCegarLoop]: Found error trace
[2023-01-31 11:34:45,039 INFO  L195           NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1]
[2023-01-31 11:34:45,039 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-01-31 11:34:45,040 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-01-31 11:34:45,040 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2023-01-31 11:34:45,040 INFO  L85        PathProgramCache]: Analyzing trace with hash -1759767339, now seen corresponding path program 1 times
[2023-01-31 11:34:45,040 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-01-31 11:34:45,041 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788940505]
[2023-01-31 11:34:45,041 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-01-31 11:34:45,041 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-01-31 11:34:45,048 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-01-31 11:34:45,233 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4
[2023-01-31 11:34:45,236 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-01-31 11:34:45,239 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2023-01-31 11:34:45,250 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-01-31 11:34:45,253 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2023-01-31 11:34:45,253 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-01-31 11:34:45,253 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788940505]
[2023-01-31 11:34:45,253 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788940505] provided 1 perfect and 0 imperfect interpolant sequences
[2023-01-31 11:34:45,254 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-01-31 11:34:45,254 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2023-01-31 11:34:45,254 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292965440]
[2023-01-31 11:34:45,254 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-01-31 11:34:45,255 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-01-31 11:34:45,255 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-01-31 11:34:45,255 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-01-31 11:34:45,256 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2023-01-31 11:34:45,256 INFO  L87              Difference]: Start difference. First operand 27 states and 30 transitions. Second operand  has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-01-31 11:34:45,337 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-01-31 11:34:45,351 INFO  L93              Difference]: Finished difference Result 33 states and 35 transitions.
[2023-01-31 11:34:45,352 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-01-31 11:34:45,352 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20
[2023-01-31 11:34:45,352 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-01-31 11:34:45,354 INFO  L225             Difference]: With dead ends: 33
[2023-01-31 11:34:45,354 INFO  L226             Difference]: Without dead ends: 31
[2023-01-31 11:34:45,355 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2023-01-31 11:34:45,356 INFO  L413           NwaCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-01-31 11:34:45,360 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 47 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-01-31 11:34:45,360 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 31 states.
[2023-01-31 11:34:45,368 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31.
[2023-01-31 11:34:45,370 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 31 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2023-01-31 11:34:45,371 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions.
[2023-01-31 11:34:45,371 INFO  L78                 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 20
[2023-01-31 11:34:45,372 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-01-31 11:34:45,372 INFO  L495      AbstractCegarLoop]: Abstraction has 31 states and 33 transitions.
[2023-01-31 11:34:45,372 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-01-31 11:34:45,372 INFO  L276                IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions.
[2023-01-31 11:34:45,373 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2023-01-31 11:34:45,374 INFO  L187           NwaCegarLoop]: Found error trace
[2023-01-31 11:34:45,374 INFO  L195           NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-01-31 11:34:45,374 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2023-01-31 11:34:45,375 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-01-31 11:34:45,375 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2023-01-31 11:34:45,375 INFO  L85        PathProgramCache]: Analyzing trace with hash 956946128, now seen corresponding path program 1 times
[2023-01-31 11:34:45,375 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-01-31 11:34:45,376 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39196889]
[2023-01-31 11:34:45,376 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-01-31 11:34:45,376 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-01-31 11:34:45,382 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-01-31 11:34:45,506 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4
[2023-01-31 11:34:45,509 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-01-31 11:34:45,511 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2023-01-31 11:34:45,512 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-01-31 11:34:45,529 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16
[2023-01-31 11:34:45,536 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-01-31 11:34:45,540 INFO  L134       CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked.
[2023-01-31 11:34:45,540 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-01-31 11:34:45,541 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39196889]
[2023-01-31 11:34:45,541 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39196889] provided 1 perfect and 0 imperfect interpolant sequences
[2023-01-31 11:34:45,541 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-01-31 11:34:45,541 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2023-01-31 11:34:45,541 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800337956]
[2023-01-31 11:34:45,541 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-01-31 11:34:45,542 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-01-31 11:34:45,542 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-01-31 11:34:45,543 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-01-31 11:34:45,543 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2023-01-31 11:34:45,544 INFO  L87              Difference]: Start difference. First operand 31 states and 33 transitions. Second operand  has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)
[2023-01-31 11:34:45,622 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-01-31 11:34:45,622 INFO  L93              Difference]: Finished difference Result 58 states and 69 transitions.
[2023-01-31 11:34:45,622 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-01-31 11:34:45,622 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26
[2023-01-31 11:34:45,623 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-01-31 11:34:45,623 INFO  L225             Difference]: With dead ends: 58
[2023-01-31 11:34:45,623 INFO  L226             Difference]: Without dead ends: 51
[2023-01-31 11:34:45,624 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2023-01-31 11:34:45,625 INFO  L413           NwaCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-01-31 11:34:45,625 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 70 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-01-31 11:34:45,626 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 51 states.
[2023-01-31 11:34:45,631 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44.
[2023-01-31 11:34:45,638 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 44 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2023-01-31 11:34:45,639 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions.
[2023-01-31 11:34:45,655 INFO  L78                 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 26
[2023-01-31 11:34:45,656 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-01-31 11:34:45,656 INFO  L495      AbstractCegarLoop]: Abstraction has 44 states and 50 transitions.
[2023-01-31 11:34:45,656 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)
[2023-01-31 11:34:45,656 INFO  L276                IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions.
[2023-01-31 11:34:45,658 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 52
[2023-01-31 11:34:45,658 INFO  L187           NwaCegarLoop]: Found error trace
[2023-01-31 11:34:45,658 INFO  L195           NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1]
[2023-01-31 11:34:45,658 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2023-01-31 11:34:45,658 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-01-31 11:34:45,659 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2023-01-31 11:34:45,659 INFO  L85        PathProgramCache]: Analyzing trace with hash -131975471, now seen corresponding path program 1 times
[2023-01-31 11:34:45,659 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-01-31 11:34:45,659 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345731734]
[2023-01-31 11:34:45,659 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-01-31 11:34:45,660 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-01-31 11:34:45,675 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-01-31 11:34:45,796 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4
[2023-01-31 11:34:45,798 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-01-31 11:34:45,799 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2023-01-31 11:34:45,801 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-01-31 11:34:45,803 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16
[2023-01-31 11:34:45,804 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-01-31 11:34:45,805 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22
[2023-01-31 11:34:45,806 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-01-31 11:34:45,809 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29
[2023-01-31 11:34:45,810 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-01-31 11:34:45,813 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35
[2023-01-31 11:34:45,814 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-01-31 11:34:45,829 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41
[2023-01-31 11:34:45,831 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-01-31 11:34:45,836 INFO  L134       CoverageAnalysis]: Checked inductivity of 123 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked.
[2023-01-31 11:34:45,836 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-01-31 11:34:45,837 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345731734]
[2023-01-31 11:34:45,837 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345731734] provided 1 perfect and 0 imperfect interpolant sequences
[2023-01-31 11:34:45,837 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-01-31 11:34:45,837 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2023-01-31 11:34:45,837 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674439746]
[2023-01-31 11:34:45,837 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-01-31 11:34:45,838 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-01-31 11:34:45,838 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-01-31 11:34:45,839 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-01-31 11:34:45,839 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2023-01-31 11:34:45,839 INFO  L87              Difference]: Start difference. First operand 44 states and 50 transitions. Second operand  has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)
[2023-01-31 11:34:45,890 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-01-31 11:34:45,891 INFO  L93              Difference]: Finished difference Result 50 states and 55 transitions.
[2023-01-31 11:34:45,891 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-01-31 11:34:45,891 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51
[2023-01-31 11:34:45,892 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-01-31 11:34:45,893 INFO  L225             Difference]: With dead ends: 50
[2023-01-31 11:34:45,893 INFO  L226             Difference]: Without dead ends: 46
[2023-01-31 11:34:45,894 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2023-01-31 11:34:45,897 INFO  L413           NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-01-31 11:34:45,899 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 44 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-01-31 11:34:45,900 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 46 states.
[2023-01-31 11:34:45,921 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46.
[2023-01-31 11:34:45,921 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 46 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2023-01-31 11:34:45,922 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions.
[2023-01-31 11:34:45,922 INFO  L78                 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 51
[2023-01-31 11:34:45,922 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-01-31 11:34:45,922 INFO  L495      AbstractCegarLoop]: Abstraction has 46 states and 51 transitions.
[2023-01-31 11:34:45,922 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)
[2023-01-31 11:34:45,923 INFO  L276                IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions.
[2023-01-31 11:34:45,924 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 58
[2023-01-31 11:34:45,924 INFO  L187           NwaCegarLoop]: Found error trace
[2023-01-31 11:34:45,924 INFO  L195           NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1]
[2023-01-31 11:34:45,924 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2023-01-31 11:34:45,924 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-01-31 11:34:45,925 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2023-01-31 11:34:45,925 INFO  L85        PathProgramCache]: Analyzing trace with hash 5281335, now seen corresponding path program 1 times
[2023-01-31 11:34:45,925 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-01-31 11:34:45,925 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319302868]
[2023-01-31 11:34:45,925 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-01-31 11:34:45,925 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-01-31 11:34:45,932 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-01-31 11:34:46,069 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4
[2023-01-31 11:34:46,070 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-01-31 11:34:46,073 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2023-01-31 11:34:46,074 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-01-31 11:34:46,075 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16
[2023-01-31 11:34:46,077 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-01-31 11:34:46,078 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22
[2023-01-31 11:34:46,081 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-01-31 11:34:46,083 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29
[2023-01-31 11:34:46,085 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-01-31 11:34:46,088 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35
[2023-01-31 11:34:46,103 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-01-31 11:34:46,109 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41
[2023-01-31 11:34:46,110 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-01-31 11:34:46,112 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47
[2023-01-31 11:34:46,113 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-01-31 11:34:46,115 INFO  L134       CoverageAnalysis]: Checked inductivity of 155 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked.
[2023-01-31 11:34:46,115 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-01-31 11:34:46,115 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319302868]
[2023-01-31 11:34:46,115 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319302868] provided 1 perfect and 0 imperfect interpolant sequences
[2023-01-31 11:34:46,115 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-01-31 11:34:46,116 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2023-01-31 11:34:46,116 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964472459]
[2023-01-31 11:34:46,116 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-01-31 11:34:46,117 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2023-01-31 11:34:46,117 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-01-31 11:34:46,117 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2023-01-31 11:34:46,118 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2023-01-31 11:34:46,118 INFO  L87              Difference]: Start difference. First operand 46 states and 51 transitions. Second operand  has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6)
[2023-01-31 11:34:46,179 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-01-31 11:34:46,179 INFO  L93              Difference]: Finished difference Result 46 states and 51 transitions.
[2023-01-31 11:34:46,179 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-01-31 11:34:46,181 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 57
[2023-01-31 11:34:46,182 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-01-31 11:34:46,183 INFO  L225             Difference]: With dead ends: 46
[2023-01-31 11:34:46,183 INFO  L226             Difference]: Without dead ends: 0
[2023-01-31 11:34:46,183 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2023-01-31 11:34:46,185 INFO  L413           NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-01-31 11:34:46,186 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 46 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-01-31 11:34:46,186 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2023-01-31 11:34:46,187 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2023-01-31 11:34:46,187 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2023-01-31 11:34:46,187 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2023-01-31 11:34:46,187 INFO  L78                 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57
[2023-01-31 11:34:46,187 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-01-31 11:34:46,189 INFO  L495      AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2023-01-31 11:34:46,189 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6)
[2023-01-31 11:34:46,190 INFO  L276                IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2023-01-31 11:34:46,190 INFO  L282                IsEmpty]: Finished isEmpty. No accepting run.
[2023-01-31 11:34:46,192 INFO  L805   garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining)
[2023-01-31 11:34:46,207 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2023-01-31 11:34:46,211 INFO  L343    DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2023-01-31 11:34:46,375 INFO  L899   garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed.
[2023-01-31 11:34:46,376 INFO  L899   garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed.
[2023-01-31 11:34:46,376 INFO  L902   garLoopResultBuilder]: At program point main_returnLabel#1(lines 14 28) the Hoare annotation is: true
[2023-01-31 11:34:46,376 INFO  L899   garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed.
[2023-01-31 11:34:46,376 INFO  L899   garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed.
[2023-01-31 11:34:46,376 INFO  L899   garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed.
[2023-01-31 11:34:46,376 INFO  L895   garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~i~0#1| 100) (<= |ULTIMATE.start_main_~j~0#1| 100) (< 99 |ULTIMATE.start_main_~j~0#1|))
[2023-01-31 11:34:46,377 INFO  L895   garLoopResultBuilder]: At program point L24-1(lines 16 25) the Hoare annotation is: (or (= |ULTIMATE.start_main_~i~0#1| 0) (and (<= |ULTIMATE.start_main_~i~0#1| 100) (<= |ULTIMATE.start_main_~j~0#1| 100) (< 99 |ULTIMATE.start_main_~j~0#1|)))
[2023-01-31 11:34:46,377 INFO  L899   garLoopResultBuilder]: For program point L22(line 22) no Hoare annotation was computed.
[2023-01-31 11:34:46,377 INFO  L895   garLoopResultBuilder]: At program point L20(line 20) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~i~0#1| 99) (<= |ULTIMATE.start_main_~j~0#1| 100))
[2023-01-31 11:34:46,377 INFO  L895   garLoopResultBuilder]: At program point L20-1(lines 18 21) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~i~0#1| 99) (<= |ULTIMATE.start_main_~j~0#1| 100))
[2023-01-31 11:34:46,377 INFO  L895   garLoopResultBuilder]: At program point L18-2(lines 18 21) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~i~0#1| 99) (<= |ULTIMATE.start_main_~j~0#1| 100) (< 99 |ULTIMATE.start_main_~j~0#1|))
[2023-01-31 11:34:46,377 INFO  L895   garLoopResultBuilder]: At program point L16-2(lines 16 25) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~i~0#1| 100) (<= |ULTIMATE.start_main_~j~0#1| 100) (< 99 |ULTIMATE.start_main_~j~0#1|) (< 99 |ULTIMATE.start_main_~i~0#1|))
[2023-01-31 11:34:46,378 INFO  L899   garLoopResultBuilder]: For program point L13(line 13) no Hoare annotation was computed.
[2023-01-31 11:34:46,378 INFO  L899   garLoopResultBuilder]: For program point L13-1(line 13) no Hoare annotation was computed.
[2023-01-31 11:34:46,378 INFO  L899   garLoopResultBuilder]: For program point L13-3(line 13) no Hoare annotation was computed.
[2023-01-31 11:34:46,378 INFO  L899   garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(line 13) no Hoare annotation was computed.
[2023-01-31 11:34:46,378 INFO  L902   garLoopResultBuilder]: At program point $Ultimate##0(line 13) the Hoare annotation is: true
[2023-01-31 11:34:46,378 INFO  L899   garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed.
[2023-01-31 11:34:46,381 INFO  L445         BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1]
[2023-01-31 11:34:46,383 INFO  L178   ceAbstractionStarter]: Computing trace abstraction results
[2023-01-31 11:34:46,409 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 11:34:46 BoogieIcfgContainer
[2023-01-31 11:34:46,409 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2023-01-31 11:34:46,409 INFO  L113        PluginConnector]: ------------------------Witness Printer----------------------------
[2023-01-31 11:34:46,410 INFO  L271        PluginConnector]: Initializing Witness Printer...
[2023-01-31 11:34:46,410 INFO  L275        PluginConnector]: Witness Printer initialized
[2023-01-31 11:34:46,410 INFO  L185        PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:34:43" (3/4) ...
[2023-01-31 11:34:46,412 INFO  L137         WitnessPrinter]: Generating witness for correct program
[2023-01-31 11:34:46,417 INFO  L361     RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert
[2023-01-31 11:34:46,420 INFO  L961   BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges
[2023-01-31 11:34:46,420 INFO  L961   BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges
[2023-01-31 11:34:46,420 INFO  L961   BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges
[2023-01-31 11:34:46,420 INFO  L961   BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges
[2023-01-31 11:34:46,476 INFO  L141         WitnessManager]: Wrote witness to /mnt/thread-witnesses/replication/UAutomizer-linux/witness.graphml
[2023-01-31 11:34:46,476 INFO  L132        PluginConnector]: ------------------------ END Witness Printer----------------------------
[2023-01-31 11:34:46,477 INFO  L158              Benchmark]: Toolchain (without parser) took 3743.39ms. Allocated memory is still 43.5MB. Free memory was 14.4MB in the beginning and 13.2MB in the end (delta: 1.2MB). Peak memory consumption was 1.2MB. Max. memory is 15.6GB.
[2023-01-31 11:34:46,477 INFO  L158              Benchmark]: CDTParser took 0.15ms. Allocated memory is still 33.1MB. Free memory was 14.1MB in the beginning and 14.1MB in the end (delta: 26.0kB). Peak memory consumption was 26.0kB. Max. memory is 15.6GB.
[2023-01-31 11:34:46,477 INFO  L158              Benchmark]: CACSL2BoogieTranslator took 302.85ms. Allocated memory is still 43.5MB. Free memory was 14.3MB in the beginning and 15.7MB in the end (delta: -1.4MB). Peak memory consumption was 1.8MB. Max. memory is 15.6GB.
[2023-01-31 11:34:46,478 INFO  L158              Benchmark]: Boogie Procedure Inliner took 51.13ms. Allocated memory is still 43.5MB. Free memory was 15.7MB in the beginning and 14.3MB in the end (delta: 1.3MB). Peak memory consumption was 1.3MB. Max. memory is 15.6GB.
[2023-01-31 11:34:46,478 INFO  L158              Benchmark]: Boogie Preprocessor took 26.40ms. Allocated memory is still 43.5MB. Free memory was 14.2MB in the beginning and 13.3MB in the end (delta: 923.1kB). Peak memory consumption was 923.1kB. Max. memory is 15.6GB.
[2023-01-31 11:34:46,478 INFO  L158              Benchmark]: RCFGBuilder took 416.17ms. Allocated memory is still 43.5MB. Free memory was 13.1MB in the beginning and 15.6MB in the end (delta: -2.5MB). Peak memory consumption was 1.0MB. Max. memory is 15.6GB.
[2023-01-31 11:34:46,478 INFO  L158              Benchmark]: TraceAbstraction took 2858.00ms. Allocated memory is still 43.5MB. Free memory was 15.0MB in the beginning and 15.7MB in the end (delta: -671.0kB). Peak memory consumption was 5.0MB. Max. memory is 15.6GB.
[2023-01-31 11:34:46,479 INFO  L158              Benchmark]: Witness Printer took 66.82ms. Allocated memory is still 43.5MB. Free memory was 15.7MB in the beginning and 13.2MB in the end (delta: 2.5MB). Peak memory consumption was 2.5MB. Max. memory is 15.6GB.
[2023-01-31 11:34:46,481 INFO  L339   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.15ms. Allocated memory is still 33.1MB. Free memory was 14.1MB in the beginning and 14.1MB in the end (delta: 26.0kB). Peak memory consumption was 26.0kB. Max. memory is 15.6GB.
 * CACSL2BoogieTranslator took 302.85ms. Allocated memory is still 43.5MB. Free memory was 14.3MB in the beginning and 15.7MB in the end (delta: -1.4MB). Peak memory consumption was 1.8MB. Max. memory is 15.6GB.
 * Boogie Procedure Inliner took 51.13ms. Allocated memory is still 43.5MB. Free memory was 15.7MB in the beginning and 14.3MB in the end (delta: 1.3MB). Peak memory consumption was 1.3MB. Max. memory is 15.6GB.
 * Boogie Preprocessor took 26.40ms. Allocated memory is still 43.5MB. Free memory was 14.2MB in the beginning and 13.3MB in the end (delta: 923.1kB). Peak memory consumption was 923.1kB. Max. memory is 15.6GB.
 * RCFGBuilder took 416.17ms. Allocated memory is still 43.5MB. Free memory was 13.1MB in the beginning and 15.6MB in the end (delta: -2.5MB). Peak memory consumption was 1.0MB. Max. memory is 15.6GB.
 * TraceAbstraction took 2858.00ms. Allocated memory is still 43.5MB. Free memory was 15.0MB in the beginning and 15.7MB in the end (delta: -671.0kB). Peak memory consumption was 5.0MB. Max. memory is 15.6GB.
 * Witness Printer took 66.82ms. Allocated memory is still 43.5MB. Free memory was 15.7MB in the beginning and 13.2MB in the end (delta: 2.5MB). Peak memory consumption was 2.5MB. Max. memory is 15.6GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - StatisticsResult: ErrorAutomatonStatistics
    NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0
  - PositiveResult [Line: 13]: call to reach_error is unreachable
    For all program executions holds that call to reach_error is unreachable at this location
  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 2 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.7s, OverallIterations: 8, TraceHistogramMax: 9, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 54 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 42 mSDsluCounter, 386 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 248 mSDsCounter, 16 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 200 IncrementalHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 16 mSolverCounterUnsat, 138 mSDtfsCounter, 200 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=7, InterpolantAutomatonStates: 48, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 29 PreInvPairs, 48 NumberOfFragments, 63 HoareAnnotationTreeSize, 29 FomulaSimplifications, 98 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 102 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 191 NumberOfCodeBlocks, 191 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 183 ConstructedInterpolants, 0 QuantifiedInterpolants, 297 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 316/316 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
  - AllSpecificationsHoldResult: All specifications hold
    1 specifications checked. All of them hold
  - InvariantResult [Line: 14]: Loop Invariant
    Derived loop invariant: 1
  - InvariantResult [Line: 18]: Loop Invariant
    Derived loop invariant: i <= 99 && j <= 100
  - InvariantResult [Line: 16]: Loop Invariant
    Derived loop invariant: i == 0 || ((i <= 100 && j <= 100) && 99 < j)
RESULT: Ultimate proved your program to be correct!
[2023-01-31 11:34:46,526 INFO  L552       MonitoredProcess]: [MP /mnt/thread-witnesses/replication/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0
Received shutdown request...
--- End real Ultimate output ---

Execution finished normally
Writing output log to file Ultimate.log
Result:
TRUE
