/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_78-equ_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:41:27,908 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:41:28,001 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 11:41:28,040 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:41:28,041 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:41:28,042 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:41:28,042 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:41:28,043 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:41:28,043 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:41:28,047 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:41:28,048 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:41:28,048 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:41:28,049 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:41:28,050 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:41:28,050 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:41:28,050 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:41:28,050 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:41:28,051 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:41:28,051 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:41:28,051 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:41:28,051 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:41:28,053 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:41:28,053 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:41:28,054 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:41:28,054 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:41:28,055 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:41:28,055 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:41:28,055 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:41:28,056 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:41:28,056 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:41:28,057 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:41:28,057 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:41:28,057 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:41:28,334 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:41:28,363 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:41:28,366 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:41:28,367 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:41:28,367 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:41:28,368 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_78-equ_racing.i [2023-11-17 11:41:29,616 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:41:29,947 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:41:29,948 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_78-equ_racing.i [2023-11-17 11:41:29,966 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4115f92c2/5522ff53d14c4401977062fe76c85152/FLAG84bdd92be [2023-11-17 11:41:29,986 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4115f92c2/5522ff53d14c4401977062fe76c85152 [2023-11-17 11:41:29,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:41:29,990 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:41:29,992 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:41:29,992 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:41:29,996 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:41:29,997 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:41:29" (1/1) ... [2023-11-17 11:41:29,999 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45790b56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:41:29, skipping insertion in model container [2023-11-17 11:41:29,999 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:41:29" (1/1) ... [2023-11-17 11:41:30,054 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:41:30,494 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_78-equ_racing.i[47038,47051] [2023-11-17 11:41:30,536 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:41:30,553 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:41:30,608 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_78-equ_racing.i[47038,47051] [2023-11-17 11:41:30,620 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:41:30,669 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:41:30,670 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:41:30 WrapperNode [2023-11-17 11:41:30,670 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:41:30,671 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:41:30,671 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:41:30,671 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:41:30,677 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:41:30" (1/1) ... [2023-11-17 11:41:30,695 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:41:30" (1/1) ... [2023-11-17 11:41:30,721 INFO L138 Inliner]: procedures = 272, calls = 64, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 229 [2023-11-17 11:41:30,722 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:41:30,722 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:41:30,723 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:41:30,723 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:41:30,731 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:41:30" (1/1) ... [2023-11-17 11:41:30,732 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:41:30" (1/1) ... [2023-11-17 11:41:30,736 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:41:30" (1/1) ... [2023-11-17 11:41:30,736 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:41:30" (1/1) ... [2023-11-17 11:41:30,743 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:41:30" (1/1) ... [2023-11-17 11:41:30,748 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:41:30" (1/1) ... [2023-11-17 11:41:30,750 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:41:30" (1/1) ... [2023-11-17 11:41:30,752 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:41:30" (1/1) ... [2023-11-17 11:41:30,755 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:41:30,756 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:41:30,757 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:41:30,757 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:41:30,757 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:41:30" (1/1) ... [2023-11-17 11:41:30,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:41:30,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:41:30,807 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 11:41:30,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 11:41:30,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:41:30,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:41:30,837 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 11:41:30,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:41:30,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:41:30,838 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 11:41:30,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:41:30,838 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 11:41:30,838 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 11:41:30,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:41:30,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:41:30,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:41:30,840 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 11:41:30,968 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:41:30,971 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:41:31,315 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:41:31,500 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:41:31,500 INFO L307 CfgBuilder]: Removed 22 assume(true) statements. [2023-11-17 11:41:31,501 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:41:31 BoogieIcfgContainer [2023-11-17 11:41:31,502 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:41:31,504 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:41:31,504 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:41:31,507 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:41:31,507 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:41:29" (1/3) ... [2023-11-17 11:41:31,508 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43212aec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:41:31, skipping insertion in model container [2023-11-17 11:41:31,508 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:41:30" (2/3) ... [2023-11-17 11:41:31,508 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43212aec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:41:31, skipping insertion in model container [2023-11-17 11:41:31,509 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:41:31" (3/3) ... [2023-11-17 11:41:31,510 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_78-equ_racing.i [2023-11-17 11:41:31,528 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:41:31,528 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-17 11:41:31,528 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:41:31,569 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 11:41:31,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 94 transitions, 195 flow [2023-11-17 11:41:31,680 INFO L124 PetriNetUnfolderBase]: 38/139 cut-off events. [2023-11-17 11:41:31,680 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:41:31,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 139 events. 38/139 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 532 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 87. Up to 8 conditions per place. [2023-11-17 11:41:31,687 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 94 transitions, 195 flow [2023-11-17 11:41:31,700 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 91 transitions, 186 flow [2023-11-17 11:41:31,704 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:41:31,722 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 70 places, 91 transitions, 186 flow [2023-11-17 11:41:31,727 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 70 places, 91 transitions, 186 flow [2023-11-17 11:41:31,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 91 transitions, 186 flow [2023-11-17 11:41:31,760 INFO L124 PetriNetUnfolderBase]: 36/136 cut-off events. [2023-11-17 11:41:31,760 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:41:31,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 136 events. 36/136 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 529 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 87. Up to 8 conditions per place. [2023-11-17 11:41:31,764 INFO L119 LiptonReduction]: Number of co-enabled transitions 3854 [2023-11-17 11:41:34,624 INFO L134 LiptonReduction]: Checked pairs total: 7800 [2023-11-17 11:41:34,624 INFO L136 LiptonReduction]: Total number of compositions: 62 [2023-11-17 11:41:34,647 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:41:34,655 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@73ca6060, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:41:34,655 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 11:41:34,660 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:41:34,661 INFO L124 PetriNetUnfolderBase]: 8/30 cut-off events. [2023-11-17 11:41:34,661 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:41:34,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:41:34,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 11:41:34,662 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:41:34,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:41:34,668 INFO L85 PathProgramCache]: Analyzing trace with hash 669444194, now seen corresponding path program 1 times [2023-11-17 11:41:34,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:41:34,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038170742] [2023-11-17 11:41:34,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:34,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:41:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:41:34,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:41:34,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:41:34,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038170742] [2023-11-17 11:41:34,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038170742] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:41:34,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:41:34,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:41:34,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519545704] [2023-11-17 11:41:34,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:41:34,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:41:34,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:41:35,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:41:35,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:41:35,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 156 [2023-11-17 11:41:35,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 63 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2023-11-17 11:41:35,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:41:35,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 156 [2023-11-17 11:41:35,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:41:35,194 INFO L124 PetriNetUnfolderBase]: 288/615 cut-off events. [2023-11-17 11:41:35,195 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:41:35,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1169 conditions, 615 events. 288/615 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3033 event pairs, 96 based on Foata normal form. 84/614 useless extension candidates. Maximal degree in co-relation 1148. Up to 532 conditions per place. [2023-11-17 11:41:35,201 INFO L140 encePairwiseOnDemand]: 130/156 looper letters, 48 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-11-17 11:41:35,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 56 transitions, 216 flow [2023-11-17 11:41:35,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:41:35,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:41:35,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 169 transitions. [2023-11-17 11:41:35,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3611111111111111 [2023-11-17 11:41:35,222 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 169 transitions. [2023-11-17 11:41:35,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 169 transitions. [2023-11-17 11:41:35,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:41:35,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 169 transitions. [2023-11-17 11:41:35,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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) [2023-11-17 11:41:35,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 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) [2023-11-17 11:41:35,233 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 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) [2023-11-17 11:41:35,235 INFO L175 Difference]: Start difference. First operand has 42 places, 63 transitions, 130 flow. Second operand 3 states and 169 transitions. [2023-11-17 11:41:35,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 56 transitions, 216 flow [2023-11-17 11:41:35,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 56 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:41:35,240 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 92 flow [2023-11-17 11:41:35,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2023-11-17 11:41:35,246 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2023-11-17 11:41:35,246 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 92 flow [2023-11-17 11:41:35,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2023-11-17 11:41:35,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:41:35,247 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 11:41:35,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:41:35,247 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:41:35,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:41:35,248 INFO L85 PathProgramCache]: Analyzing trace with hash -824424222, now seen corresponding path program 1 times [2023-11-17 11:41:35,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:41:35,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498662488] [2023-11-17 11:41:35,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:35,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:41:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:41:35,280 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:41:35,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:41:35,319 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:41:35,320 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:41:35,321 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 11:41:35,323 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 11:41:35,323 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 11:41:35,324 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 11:41:35,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:41:35,324 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:41:35,327 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:41:35,327 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:41:35,354 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 11:41:35,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 137 transitions, 290 flow [2023-11-17 11:41:35,394 INFO L124 PetriNetUnfolderBase]: 64/235 cut-off events. [2023-11-17 11:41:35,395 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 11:41:35,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 235 events. 64/235 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1081 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 141. Up to 12 conditions per place. [2023-11-17 11:41:35,397 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 137 transitions, 290 flow [2023-11-17 11:41:35,400 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 136 transitions, 288 flow [2023-11-17 11:41:35,400 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:41:35,400 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 136 transitions, 288 flow [2023-11-17 11:41:35,400 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 136 transitions, 288 flow [2023-11-17 11:41:35,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 136 transitions, 288 flow [2023-11-17 11:41:35,420 INFO L124 PetriNetUnfolderBase]: 63/234 cut-off events. [2023-11-17 11:41:35,420 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 11:41:35,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 234 events. 63/234 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1098 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 141. Up to 12 conditions per place. [2023-11-17 11:41:35,430 INFO L119 LiptonReduction]: Number of co-enabled transitions 11480 [2023-11-17 11:41:38,409 INFO L134 LiptonReduction]: Checked pairs total: 25663 [2023-11-17 11:41:38,409 INFO L136 LiptonReduction]: Total number of compositions: 90 [2023-11-17 11:41:38,411 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:41:38,412 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@73ca6060, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:41:38,412 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 11:41:38,416 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:41:38,416 INFO L124 PetriNetUnfolderBase]: 8/30 cut-off events. [2023-11-17 11:41:38,416 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:41:38,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:41:38,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 11:41:38,417 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:41:38,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:41:38,417 INFO L85 PathProgramCache]: Analyzing trace with hash 892682291, now seen corresponding path program 1 times [2023-11-17 11:41:38,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:41:38,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916668171] [2023-11-17 11:41:38,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:38,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:41:38,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:41:38,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:41:38,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:41:38,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916668171] [2023-11-17 11:41:38,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916668171] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:41:38,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:41:38,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:41:38,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309504792] [2023-11-17 11:41:38,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:41:38,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:41:38,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:41:38,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:41:38,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:41:38,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 227 [2023-11-17 11:41:38,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 95 transitions, 206 flow. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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) [2023-11-17 11:41:38,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:41:38,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 227 [2023-11-17 11:41:38,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:41:39,900 INFO L124 PetriNetUnfolderBase]: 10052/15689 cut-off events. [2023-11-17 11:41:39,901 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2023-11-17 11:41:39,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30461 conditions, 15689 events. 10052/15689 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 100711 event pairs, 6312 based on Foata normal form. 2080/15323 useless extension candidates. Maximal degree in co-relation 12391. Up to 14667 conditions per place. [2023-11-17 11:41:40,007 INFO L140 encePairwiseOnDemand]: 191/227 looper letters, 69 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2023-11-17 11:41:40,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 79 transitions, 316 flow [2023-11-17 11:41:40,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:41:40,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:41:40,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2023-11-17 11:41:40,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.355359765051395 [2023-11-17 11:41:40,011 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 242 transitions. [2023-11-17 11:41:40,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 242 transitions. [2023-11-17 11:41:40,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:41:40,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 242 transitions. [2023-11-17 11:41:40,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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) [2023-11-17 11:41:40,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 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) [2023-11-17 11:41:40,016 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 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) [2023-11-17 11:41:40,016 INFO L175 Difference]: Start difference. First operand has 62 places, 95 transitions, 206 flow. Second operand 3 states and 242 transitions. [2023-11-17 11:41:40,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 79 transitions, 316 flow [2023-11-17 11:41:40,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 79 transitions, 316 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:41:40,019 INFO L231 Difference]: Finished difference. Result has 65 places, 63 transitions, 152 flow [2023-11-17 11:41:40,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=65, PETRI_TRANSITIONS=63} [2023-11-17 11:41:40,020 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 3 predicate places. [2023-11-17 11:41:40,020 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 63 transitions, 152 flow [2023-11-17 11:41:40,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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) [2023-11-17 11:41:40,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:41:40,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:41:40,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:41:40,021 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:41:40,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:41:40,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1815807163, now seen corresponding path program 1 times [2023-11-17 11:41:40,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:41:40,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396711772] [2023-11-17 11:41:40,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:40,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:41:40,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:41:40,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:41:40,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:41:40,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396711772] [2023-11-17 11:41:40,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396711772] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:41:40,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:41:40,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:41:40,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127464353] [2023-11-17 11:41:40,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:41:40,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 11:41:40,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:41:40,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 11:41:40,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-17 11:41:40,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 227 [2023-11-17 11:41:40,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 63 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 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) [2023-11-17 11:41:40,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:41:40,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 227 [2023-11-17 11:41:40,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:41:41,983 INFO L124 PetriNetUnfolderBase]: 11663/18636 cut-off events. [2023-11-17 11:41:41,984 INFO L125 PetriNetUnfolderBase]: For 738/738 co-relation queries the response was YES. [2023-11-17 11:41:42,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37256 conditions, 18636 events. 11663/18636 cut-off events. For 738/738 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 129424 event pairs, 3843 based on Foata normal form. 0/16394 useless extension candidates. Maximal degree in co-relation 37145. Up to 11631 conditions per place. [2023-11-17 11:41:42,105 INFO L140 encePairwiseOnDemand]: 216/227 looper letters, 117 selfloop transitions, 11 changer transitions 11/147 dead transitions. [2023-11-17 11:41:42,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 147 transitions, 626 flow [2023-11-17 11:41:42,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:41:42,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:41:42,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 309 transitions. [2023-11-17 11:41:42,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34030837004405284 [2023-11-17 11:41:42,109 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 309 transitions. [2023-11-17 11:41:42,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 309 transitions. [2023-11-17 11:41:42,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:41:42,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 309 transitions. [2023-11-17 11:41:42,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 77.25) internal successors, (309), 4 states have internal predecessors, (309), 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) [2023-11-17 11:41:42,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 227.0) internal successors, (1135), 5 states have internal predecessors, (1135), 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) [2023-11-17 11:41:42,117 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 227.0) internal successors, (1135), 5 states have internal predecessors, (1135), 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) [2023-11-17 11:41:42,117 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 152 flow. Second operand 4 states and 309 transitions. [2023-11-17 11:41:42,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 147 transitions, 626 flow [2023-11-17 11:41:42,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 147 transitions, 623 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:41:42,123 INFO L231 Difference]: Finished difference. Result has 70 places, 73 transitions, 240 flow [2023-11-17 11:41:42,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=240, PETRI_PLACES=70, PETRI_TRANSITIONS=73} [2023-11-17 11:41:42,124 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 8 predicate places. [2023-11-17 11:41:42,124 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 73 transitions, 240 flow [2023-11-17 11:41:42,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 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) [2023-11-17 11:41:42,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:41:42,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:41:42,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:41:42,125 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:41:42,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:41:42,126 INFO L85 PathProgramCache]: Analyzing trace with hash -654018916, now seen corresponding path program 1 times [2023-11-17 11:41:42,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:41:42,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099428699] [2023-11-17 11:41:42,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:42,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:41:42,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:41:42,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:41:42,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:41:42,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099428699] [2023-11-17 11:41:42,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099428699] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:41:42,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137917529] [2023-11-17 11:41:42,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:42,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:41:42,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:41:42,212 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:41:42,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 11:41:42,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:41:42,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:41:42,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:41:42,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:41:42,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:41:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:41:42,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137917529] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:41:42,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:41:42,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:41:42,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524163298] [2023-11-17 11:41:42,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:41:42,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:41:42,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:41:42,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:41:42,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:41:42,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 227 [2023-11-17 11:41:42,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 73 transitions, 240 flow. Second operand has 7 states, 7 states have (on average 44.42857142857143) internal successors, (311), 7 states have internal predecessors, (311), 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) [2023-11-17 11:41:42,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:41:42,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 227 [2023-11-17 11:41:42,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:41:42,738 INFO L124 PetriNetUnfolderBase]: 1349/2439 cut-off events. [2023-11-17 11:41:42,739 INFO L125 PetriNetUnfolderBase]: For 1051/1051 co-relation queries the response was YES. [2023-11-17 11:41:42,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5710 conditions, 2439 events. 1349/2439 cut-off events. For 1051/1051 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 14631 event pairs, 238 based on Foata normal form. 295/2634 useless extension candidates. Maximal degree in co-relation 2763. Up to 1602 conditions per place. [2023-11-17 11:41:42,758 INFO L140 encePairwiseOnDemand]: 224/227 looper letters, 88 selfloop transitions, 3 changer transitions 0/96 dead transitions. [2023-11-17 11:41:42,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 96 transitions, 474 flow [2023-11-17 11:41:42,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 11:41:42,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 11:41:42,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 294 transitions. [2023-11-17 11:41:42,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25903083700440527 [2023-11-17 11:41:42,760 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 294 transitions. [2023-11-17 11:41:42,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 294 transitions. [2023-11-17 11:41:42,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:41:42,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 294 transitions. [2023-11-17 11:41:42,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 58.8) internal successors, (294), 5 states have internal predecessors, (294), 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) [2023-11-17 11:41:42,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 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) [2023-11-17 11:41:42,764 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 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) [2023-11-17 11:41:42,765 INFO L175 Difference]: Start difference. First operand has 70 places, 73 transitions, 240 flow. Second operand 5 states and 294 transitions. [2023-11-17 11:41:42,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 96 transitions, 474 flow [2023-11-17 11:41:42,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 96 transitions, 474 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:41:42,770 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 156 flow [2023-11-17 11:41:42,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=156, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2023-11-17 11:41:42,770 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -7 predicate places. [2023-11-17 11:41:42,771 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 156 flow [2023-11-17 11:41:42,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 44.42857142857143) internal successors, (311), 7 states have internal predecessors, (311), 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) [2023-11-17 11:41:42,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:41:42,771 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-17 11:41:42,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 11:41:42,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:41:42,980 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:41:42,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:41:42,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1039261462, now seen corresponding path program 1 times [2023-11-17 11:41:42,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:41:42,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680049818] [2023-11-17 11:41:42,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:42,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:41:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:41:43,005 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:41:43,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:41:43,033 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:41:43,034 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:41:43,034 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 11:41:43,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 11:41:43,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 11:41:43,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 11:41:43,037 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 11:41:43,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:41:43,038 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-17 11:41:43,038 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:41:43,038 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:41:43,079 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 11:41:43,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 180 transitions, 387 flow [2023-11-17 11:41:43,120 INFO L124 PetriNetUnfolderBase]: 93/344 cut-off events. [2023-11-17 11:41:43,120 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 11:41:43,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369 conditions, 344 events. 93/344 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1727 event pairs, 1 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 244. Up to 16 conditions per place. [2023-11-17 11:41:43,125 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 180 transitions, 387 flow [2023-11-17 11:41:43,129 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 179 transitions, 385 flow [2023-11-17 11:41:43,129 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:41:43,129 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 135 places, 179 transitions, 385 flow [2023-11-17 11:41:43,130 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 135 places, 179 transitions, 385 flow [2023-11-17 11:41:43,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 179 transitions, 385 flow [2023-11-17 11:41:43,163 INFO L124 PetriNetUnfolderBase]: 92/343 cut-off events. [2023-11-17 11:41:43,163 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 11:41:43,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 343 events. 92/343 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1729 event pairs, 1 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 244. Up to 16 conditions per place. [2023-11-17 11:41:43,187 INFO L119 LiptonReduction]: Number of co-enabled transitions 22632 [2023-11-17 11:41:46,480 INFO L134 LiptonReduction]: Checked pairs total: 63746 [2023-11-17 11:41:46,480 INFO L136 LiptonReduction]: Total number of compositions: 123 [2023-11-17 11:41:46,489 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:41:46,491 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@73ca6060, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:41:46,491 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 11:41:46,494 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:41:46,494 INFO L124 PetriNetUnfolderBase]: 9/32 cut-off events. [2023-11-17 11:41:46,494 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:41:46,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:41:46,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 11:41:46,495 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:41:46,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:41:46,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1194693898, now seen corresponding path program 1 times [2023-11-17 11:41:46,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:41:46,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412854359] [2023-11-17 11:41:46,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:46,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:41:46,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:41:46,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:41:46,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:41:46,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412854359] [2023-11-17 11:41:46,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412854359] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:41:46,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:41:46,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:41:46,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836494231] [2023-11-17 11:41:46,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:41:46,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:41:46,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:41:46,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:41:46,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:41:46,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 303 [2023-11-17 11:41:46,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 121 transitions, 269 flow. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 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) [2023-11-17 11:41:46,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:41:46,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 303 [2023-11-17 11:41:46,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:42:03,290 INFO L124 PetriNetUnfolderBase]: 200211/274484 cut-off events. [2023-11-17 11:42:03,291 INFO L125 PetriNetUnfolderBase]: For 2928/2928 co-relation queries the response was YES. [2023-11-17 11:42:03,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539120 conditions, 274484 events. 200211/274484 cut-off events. For 2928/2928 co-relation queries the response was YES. Maximal size of possible extension queue 7050. Compared 1972492 event pairs, 123187 based on Foata normal form. 42886/273693 useless extension candidates. Maximal degree in co-relation 26852. Up to 262900 conditions per place. [2023-11-17 11:42:05,224 INFO L140 encePairwiseOnDemand]: 258/303 looper letters, 82 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2023-11-17 11:42:05,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 95 transitions, 385 flow [2023-11-17 11:42:05,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:42:05,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:42:05,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 306 transitions. [2023-11-17 11:42:05,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33663366336633666 [2023-11-17 11:42:05,228 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 306 transitions. [2023-11-17 11:42:05,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 306 transitions. [2023-11-17 11:42:05,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:42:05,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 306 transitions. [2023-11-17 11:42:05,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 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) [2023-11-17 11:42:05,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 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) [2023-11-17 11:42:05,235 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 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) [2023-11-17 11:42:05,235 INFO L175 Difference]: Start difference. First operand has 79 places, 121 transitions, 269 flow. Second operand 3 states and 306 transitions. [2023-11-17 11:42:05,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 95 transitions, 385 flow [2023-11-17 11:42:05,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 95 transitions, 385 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:42:05,245 INFO L231 Difference]: Finished difference. Result has 82 places, 80 transitions, 197 flow [2023-11-17 11:42:05,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=82, PETRI_TRANSITIONS=80} [2023-11-17 11:42:05,248 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 3 predicate places. [2023-11-17 11:42:05,249 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 80 transitions, 197 flow [2023-11-17 11:42:05,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 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) [2023-11-17 11:42:05,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:42:05,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:42:05,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 11:42:05,249 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:42:05,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:42:05,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1100927382, now seen corresponding path program 1 times [2023-11-17 11:42:05,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:42:05,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219278184] [2023-11-17 11:42:05,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:42:05,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:42:05,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:42:05,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:42:05,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:42:05,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219278184] [2023-11-17 11:42:05,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219278184] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:42:05,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:42:05,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:42:05,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031808588] [2023-11-17 11:42:05,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:42:05,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 11:42:05,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:42:05,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 11:42:05,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-17 11:42:05,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 303 [2023-11-17 11:42:05,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 80 transitions, 197 flow. Second operand has 4 states, 4 states have (on average 57.75) internal successors, (231), 4 states have internal predecessors, (231), 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) [2023-11-17 11:42:05,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:42:05,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 303 [2023-11-17 11:42:05,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:42:28,490 INFO L124 PetriNetUnfolderBase]: 277294/387597 cut-off events. [2023-11-17 11:42:28,490 INFO L125 PetriNetUnfolderBase]: For 14167/14167 co-relation queries the response was YES. [2023-11-17 11:42:29,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 774343 conditions, 387597 events. 277294/387597 cut-off events. For 14167/14167 co-relation queries the response was YES. Maximal size of possible extension queue 11385. Compared 3063660 event pairs, 66383 based on Foata normal form. 0/341603 useless extension candidates. Maximal degree in co-relation 774236. Up to 237336 conditions per place. [2023-11-17 11:42:30,573 INFO L140 encePairwiseOnDemand]: 286/303 looper letters, 161 selfloop transitions, 18 changer transitions 0/190 dead transitions. [2023-11-17 11:42:30,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 190 transitions, 823 flow [2023-11-17 11:42:30,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:42:30,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:42:30,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 407 transitions. [2023-11-17 11:42:30,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3358085808580858 [2023-11-17 11:42:30,575 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 407 transitions. [2023-11-17 11:42:30,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 407 transitions. [2023-11-17 11:42:30,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:42:30,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 407 transitions. [2023-11-17 11:42:30,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 101.75) internal successors, (407), 4 states have internal predecessors, (407), 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) [2023-11-17 11:42:30,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 303.0) internal successors, (1515), 5 states have internal predecessors, (1515), 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) [2023-11-17 11:42:30,579 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 303.0) internal successors, (1515), 5 states have internal predecessors, (1515), 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) [2023-11-17 11:42:30,579 INFO L175 Difference]: Start difference. First operand has 82 places, 80 transitions, 197 flow. Second operand 4 states and 407 transitions. [2023-11-17 11:42:30,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 190 transitions, 823 flow [2023-11-17 11:42:30,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 190 transitions, 820 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:42:30,584 INFO L231 Difference]: Finished difference. Result has 87 places, 97 transitions, 339 flow [2023-11-17 11:42:30,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=339, PETRI_PLACES=87, PETRI_TRANSITIONS=97} [2023-11-17 11:42:30,585 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 8 predicate places. [2023-11-17 11:42:30,585 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 97 transitions, 339 flow [2023-11-17 11:42:30,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 4 states have internal predecessors, (231), 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) [2023-11-17 11:42:30,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:42:30,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:42:30,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 11:42:30,585 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:42:30,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:42:30,586 INFO L85 PathProgramCache]: Analyzing trace with hash -680640, now seen corresponding path program 1 times [2023-11-17 11:42:30,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:42:30,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802301993] [2023-11-17 11:42:30,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:42:30,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:42:30,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:42:30,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:42:30,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:42:30,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802301993] [2023-11-17 11:42:30,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802301993] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:42:30,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994229892] [2023-11-17 11:42:30,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:42:30,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:42:30,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:42:30,643 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:42:30,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 11:42:30,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:42:30,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:42:30,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:42:30,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:42:30,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:42:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:42:30,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994229892] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:42:30,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:42:30,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:42:30,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739971351] [2023-11-17 11:42:30,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:42:30,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:42:30,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:42:30,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:42:30,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:42:30,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 303 [2023-11-17 11:42:30,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 97 transitions, 339 flow. Second operand has 7 states, 7 states have (on average 58.42857142857143) internal successors, (409), 7 states have internal predecessors, (409), 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) [2023-11-17 11:42:30,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:42:30,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 303 [2023-11-17 11:42:30,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:42:33,938 INFO L124 PetriNetUnfolderBase]: 34724/51760 cut-off events. [2023-11-17 11:42:33,938 INFO L125 PetriNetUnfolderBase]: For 27452/27452 co-relation queries the response was YES. [2023-11-17 11:42:34,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125532 conditions, 51760 events. 34724/51760 cut-off events. For 27452/27452 co-relation queries the response was YES. Maximal size of possible extension queue 1961. Compared 383093 event pairs, 3057 based on Foata normal form. 4764/54091 useless extension candidates. Maximal degree in co-relation 19553. Up to 33759 conditions per place. [2023-11-17 11:42:34,249 INFO L140 encePairwiseOnDemand]: 300/303 looper letters, 164 selfloop transitions, 4 changer transitions 0/176 dead transitions. [2023-11-17 11:42:34,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 176 transitions, 942 flow [2023-11-17 11:42:34,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 11:42:34,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 11:42:34,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 475 transitions. [2023-11-17 11:42:34,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26127612761276126 [2023-11-17 11:42:34,252 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 475 transitions. [2023-11-17 11:42:34,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 475 transitions. [2023-11-17 11:42:34,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:42:34,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 475 transitions. [2023-11-17 11:42:34,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.16666666666667) internal successors, (475), 6 states have internal predecessors, (475), 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) [2023-11-17 11:42:34,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 303.0) internal successors, (2121), 7 states have internal predecessors, (2121), 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) [2023-11-17 11:42:34,257 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 303.0) internal successors, (2121), 7 states have internal predecessors, (2121), 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) [2023-11-17 11:42:34,257 INFO L175 Difference]: Start difference. First operand has 87 places, 97 transitions, 339 flow. Second operand 6 states and 475 transitions. [2023-11-17 11:42:34,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 176 transitions, 942 flow [2023-11-17 11:42:34,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 176 transitions, 940 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-17 11:42:34,266 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 262 flow [2023-11-17 11:42:34,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2023-11-17 11:42:34,267 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -6 predicate places. [2023-11-17 11:42:34,267 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 262 flow [2023-11-17 11:42:34,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 58.42857142857143) internal successors, (409), 7 states have internal predecessors, (409), 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) [2023-11-17 11:42:34,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:42:34,268 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-17 11:42:34,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 11:42:34,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-17 11:42:34,474 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:42:34,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:42:34,474 INFO L85 PathProgramCache]: Analyzing trace with hash -215967503, now seen corresponding path program 1 times [2023-11-17 11:42:34,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:42:34,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321371793] [2023-11-17 11:42:34,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:42:34,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:42:34,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:42:34,497 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:42:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:42:34,527 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:42:34,528 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:42:34,529 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 11:42:34,529 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 11:42:34,529 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-17 11:42:34,529 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 11:42:34,529 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 11:42:34,529 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 11:42:34,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 11:42:34,530 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-17 11:42:34,530 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:42:34,530 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:42:34,563 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 11:42:34,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 223 transitions, 486 flow [2023-11-17 11:42:34,614 INFO L124 PetriNetUnfolderBase]: 130/481 cut-off events. [2023-11-17 11:42:34,614 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 11:42:34,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 532 conditions, 481 events. 130/481 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2511 event pairs, 6 based on Foata normal form. 0/342 useless extension candidates. Maximal degree in co-relation 366. Up to 32 conditions per place. [2023-11-17 11:42:34,622 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 223 transitions, 486 flow [2023-11-17 11:42:34,629 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 167 places, 222 transitions, 484 flow [2023-11-17 11:42:34,629 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:42:34,629 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 167 places, 222 transitions, 484 flow [2023-11-17 11:42:34,630 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 167 places, 222 transitions, 484 flow [2023-11-17 11:42:34,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 222 transitions, 484 flow [2023-11-17 11:42:34,666 INFO L124 PetriNetUnfolderBase]: 129/480 cut-off events. [2023-11-17 11:42:34,666 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 11:42:34,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 531 conditions, 480 events. 129/480 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2511 event pairs, 6 based on Foata normal form. 0/342 useless extension candidates. Maximal degree in co-relation 366. Up to 32 conditions per place. [2023-11-17 11:42:34,688 INFO L119 LiptonReduction]: Number of co-enabled transitions 37392 [2023-11-17 11:42:38,360 INFO L134 LiptonReduction]: Checked pairs total: 96470 [2023-11-17 11:42:38,360 INFO L136 LiptonReduction]: Total number of compositions: 151 [2023-11-17 11:42:38,362 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:42:38,363 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@73ca6060, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:42:38,363 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 11:42:38,365 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:42:38,366 INFO L124 PetriNetUnfolderBase]: 8/30 cut-off events. [2023-11-17 11:42:38,366 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:42:38,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:42:38,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 11:42:38,366 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 11:42:38,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:42:38,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1577701013, now seen corresponding path program 1 times [2023-11-17 11:42:38,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:42:38,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624411978] [2023-11-17 11:42:38,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:42:38,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:42:38,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:42:38,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:42:38,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:42:38,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624411978] [2023-11-17 11:42:38,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624411978] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:42:38,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:42:38,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:42:38,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859938047] [2023-11-17 11:42:38,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:42:38,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:42:38,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:42:38,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:42:38,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:42:38,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 374 [2023-11-17 11:42:38,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 153 transitions, 346 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 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) [2023-11-17 11:42:38,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:42:38,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 374 [2023-11-17 11:42:38,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand