/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_08-cond_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-175f719-m [2023-11-29 19:54:24,623 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 19:54:24,688 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-NoLbe.epf [2023-11-29 19:54:24,712 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 19:54:24,713 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 19:54:24,713 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 19:54:24,714 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 19:54:24,714 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 19:54:24,714 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 19:54:24,717 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 19:54:24,718 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 19:54:24,718 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 19:54:24,718 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 19:54:24,719 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 19:54:24,719 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 19:54:24,719 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 19:54:24,719 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 19:54:24,720 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 19:54:24,720 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 19:54:24,720 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 19:54:24,720 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 19:54:24,721 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 19:54:24,721 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 19:54:24,721 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-29 19:54:24,721 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 19:54:24,722 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-29 19:54:24,722 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 19:54:24,722 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 19:54:24,722 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 19:54:24,722 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 19:54:24,723 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 19:54:24,723 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 19:54:24,723 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 19:54:24,723 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true [2023-11-29 19:54:24,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 19:54:24,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 19:54:24,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 19:54:24,935 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 19:54:24,935 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 19:54:24,936 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_08-cond_racefree.i [2023-11-29 19:54:25,941 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 19:54:26,177 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 19:54:26,178 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_08-cond_racefree.i [2023-11-29 19:54:26,189 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9be55bfd6/6727a5c22cb345e986a295a592aee53a/FLAGf4496926f [2023-11-29 19:54:26,503 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9be55bfd6/6727a5c22cb345e986a295a592aee53a [2023-11-29 19:54:26,505 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 19:54:26,506 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-29 19:54:26,506 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 19:54:26,507 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 19:54:26,510 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 19:54:26,510 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:54:26" (1/1) ... [2023-11-29 19:54:26,511 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f17c432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:54:26, skipping insertion in model container [2023-11-29 19:54:26,511 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:54:26" (1/1) ... [2023-11-29 19:54:26,558 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 19:54:26,819 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_08-cond_racefree.i[41322,41335] [2023-11-29 19:54:26,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 19:54:26,838 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 19:54:26,864 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_08-cond_racefree.i[41322,41335] [2023-11-29 19:54:26,868 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 19:54:26,913 INFO L206 MainTranslator]: Completed translation [2023-11-29 19:54:26,913 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:54:26 WrapperNode [2023-11-29 19:54:26,913 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 19:54:26,914 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 19:54:26,914 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 19:54:26,914 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 19:54:26,918 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:54:26" (1/1) ... [2023-11-29 19:54:26,950 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:54:26" (1/1) ... [2023-11-29 19:54:26,971 INFO L138 Inliner]: procedures = 271, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 97 [2023-11-29 19:54:26,971 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 19:54:26,972 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 19:54:26,972 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 19:54:26,972 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 19:54:26,977 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:54:26" (1/1) ... [2023-11-29 19:54:26,977 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:54:26" (1/1) ... [2023-11-29 19:54:26,979 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:54:26" (1/1) ... [2023-11-29 19:54:26,979 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:54:26" (1/1) ... [2023-11-29 19:54:26,991 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:54:26" (1/1) ... [2023-11-29 19:54:26,997 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:54:26" (1/1) ... [2023-11-29 19:54:27,005 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:54:26" (1/1) ... [2023-11-29 19:54:27,006 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:54:26" (1/1) ... [2023-11-29 19:54:27,008 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 19:54:27,008 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 19:54:27,008 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 19:54:27,008 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 19:54:27,009 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:54:26" (1/1) ... [2023-11-29 19:54:27,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-29 19:54:27,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-29 19:54:27,043 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) [2023-11-29 19:54:27,096 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 [2023-11-29 19:54:27,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 19:54:27,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 19:54:27,115 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-29 19:54:27,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-29 19:54:27,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-29 19:54:27,115 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-29 19:54:27,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 19:54:27,115 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-29 19:54:27,116 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-29 19:54:27,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-29 19:54:27,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 19:54:27,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 19:54:27,117 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 19:54:27,210 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 19:54:27,211 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 19:54:27,420 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 19:54:27,445 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 19:54:27,445 INFO L309 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-29 19:54:27,446 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:54:27 BoogieIcfgContainer [2023-11-29 19:54:27,447 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 19:54:27,448 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 19:54:27,448 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 19:54:27,450 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 19:54:27,450 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:54:26" (1/3) ... [2023-11-29 19:54:27,450 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6875e4cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:54:27, skipping insertion in model container [2023-11-29 19:54:27,451 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:54:26" (2/3) ... [2023-11-29 19:54:27,451 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6875e4cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:54:27, skipping insertion in model container [2023-11-29 19:54:27,451 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:54:27" (3/3) ... [2023-11-29 19:54:27,452 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_08-cond_racefree.i [2023-11-29 19:54:27,475 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 19:54:27,475 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 19:54:27,476 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 19:54:27,521 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-29 19:54:27,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 131 transitions, 269 flow [2023-11-29 19:54:27,586 INFO L124 PetriNetUnfolderBase]: 23/180 cut-off events. [2023-11-29 19:54:27,586 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 19:54:27,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 180 events. 23/180 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 441 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 88. Up to 6 conditions per place. [2023-11-29 19:54:27,591 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 131 transitions, 269 flow [2023-11-29 19:54:27,594 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 126 transitions, 256 flow [2023-11-29 19:54:27,600 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 19:54:27,604 INFO L362 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@67e565bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 19:54:27,604 INFO L363 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-29 19:54:27,619 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 19:54:27,619 INFO L124 PetriNetUnfolderBase]: 8/108 cut-off events. [2023-11-29 19:54:27,619 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 19:54:27,619 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:54:27,620 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:54:27,620 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:54:27,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:54:27,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1995570589, now seen corresponding path program 1 times [2023-11-29 19:54:27,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:54:27,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766904267] [2023-11-29 19:54:27,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:54:27,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:54:27,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:54:27,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:54:27,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 19:54:27,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766904267] [2023-11-29 19:54:27,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766904267] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 19:54:27,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 19:54:27,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 19:54:27,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962272744] [2023-11-29 19:54:27,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 19:54:27,834 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 19:54:27,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 19:54:27,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 19:54:27,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 19:54:27,856 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 131 [2023-11-29 19:54:27,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 126 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 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) [2023-11-29 19:54:27,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 19:54:27,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 131 [2023-11-29 19:54:27,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 19:54:27,967 INFO L124 PetriNetUnfolderBase]: 87/484 cut-off events. [2023-11-29 19:54:27,967 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 19:54:27,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 643 conditions, 484 events. 87/484 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2587 event pairs, 6 based on Foata normal form. 69/502 useless extension candidates. Maximal degree in co-relation 582. Up to 132 conditions per place. [2023-11-29 19:54:27,971 INFO L140 encePairwiseOnDemand]: 117/131 looper letters, 25 selfloop transitions, 2 changer transitions 2/122 dead transitions. [2023-11-29 19:54:27,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 122 transitions, 304 flow [2023-11-29 19:54:27,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 19:54:27,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 19:54:27,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 341 transitions. [2023-11-29 19:54:27,982 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.8676844783715013 [2023-11-29 19:54:27,982 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 341 transitions. [2023-11-29 19:54:27,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 341 transitions. [2023-11-29 19:54:27,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 19:54:27,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 341 transitions. [2023-11-29 19:54:27,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 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) [2023-11-29 19:54:27,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 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) [2023-11-29 19:54:27,993 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 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) [2023-11-29 19:54:27,995 INFO L307 CegarLoopForPetriNet]: 115 programPoint places, 1 predicate places. [2023-11-29 19:54:27,995 INFO L500 AbstractCegarLoop]: Abstraction has has 116 places, 122 transitions, 304 flow [2023-11-29 19:54:27,995 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 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) [2023-11-29 19:54:27,995 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:54:27,996 INFO L232 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:54:27,996 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 19:54:27,996 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:54:27,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:54:27,996 INFO L85 PathProgramCache]: Analyzing trace with hash 2008275115, now seen corresponding path program 1 times [2023-11-29 19:54:27,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:54:27,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266465425] [2023-11-29 19:54:27,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:54:27,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:54:28,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 19:54:28,025 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 19:54:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 19:54:28,064 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 19:54:28,064 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-11-29 19:54:28,065 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-29 19:54:28,067 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-29 19:54:28,067 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 19:54:28,067 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-29 19:54:28,069 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 19:54:28,069 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-29 19:54:28,109 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 19:54:28,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 164 transitions, 344 flow [2023-11-29 19:54:28,146 INFO L124 PetriNetUnfolderBase]: 40/288 cut-off events. [2023-11-29 19:54:28,146 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-29 19:54:28,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 288 events. 40/288 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 895 event pairs, 0 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 182. Up to 9 conditions per place. [2023-11-29 19:54:28,148 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 164 transitions, 344 flow [2023-11-29 19:54:28,151 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 147 places, 164 transitions, 344 flow [2023-11-29 19:54:28,152 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 19:54:28,153 INFO L362 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@67e565bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 19:54:28,153 INFO L363 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-29 19:54:28,164 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 19:54:28,164 INFO L124 PetriNetUnfolderBase]: 8/108 cut-off events. [2023-11-29 19:54:28,165 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 19:54:28,165 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:54:28,165 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:54:28,165 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:54:28,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:54:28,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1508407139, now seen corresponding path program 1 times [2023-11-29 19:54:28,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:54:28,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448474151] [2023-11-29 19:54:28,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:54:28,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:54:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:54:28,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:54:28,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 19:54:28,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448474151] [2023-11-29 19:54:28,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448474151] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 19:54:28,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 19:54:28,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 19:54:28,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430179330] [2023-11-29 19:54:28,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 19:54:28,284 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 19:54:28,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 19:54:28,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 19:54:28,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 19:54:28,285 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 164 [2023-11-29 19:54:28,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 164 transitions, 344 flow. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 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) [2023-11-29 19:54:28,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 19:54:28,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 164 [2023-11-29 19:54:28,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 19:54:28,712 INFO L124 PetriNetUnfolderBase]: 1226/4242 cut-off events. [2023-11-29 19:54:28,713 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2023-11-29 19:54:28,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6035 conditions, 4242 events. 1226/4242 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 38529 event pairs, 480 based on Foata normal form. 887/4685 useless extension candidates. Maximal degree in co-relation 763. Up to 1728 conditions per place. [2023-11-29 19:54:28,731 INFO L140 encePairwiseOnDemand]: 144/164 looper letters, 35 selfloop transitions, 2 changer transitions 3/156 dead transitions. [2023-11-29 19:54:28,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 156 transitions, 406 flow [2023-11-29 19:54:28,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 19:54:28,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 19:54:28,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 415 transitions. [2023-11-29 19:54:28,735 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.8434959349593496 [2023-11-29 19:54:28,735 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 415 transitions. [2023-11-29 19:54:28,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 415 transitions. [2023-11-29 19:54:28,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 19:54:28,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 415 transitions. [2023-11-29 19:54:28,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 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) [2023-11-29 19:54:28,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 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) [2023-11-29 19:54:28,744 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 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) [2023-11-29 19:54:28,747 INFO L307 CegarLoopForPetriNet]: 147 programPoint places, 1 predicate places. [2023-11-29 19:54:28,747 INFO L500 AbstractCegarLoop]: Abstraction has has 148 places, 156 transitions, 406 flow [2023-11-29 19:54:28,748 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 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) [2023-11-29 19:54:28,748 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:54:28,748 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:54:28,748 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 19:54:28,748 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:54:28,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:54:28,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1022670878, now seen corresponding path program 1 times [2023-11-29 19:54:28,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:54:28,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71078770] [2023-11-29 19:54:28,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:54:28,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:54:28,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:54:28,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:54:28,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 19:54:28,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71078770] [2023-11-29 19:54:28,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71078770] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 19:54:28,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818960032] [2023-11-29 19:54:28,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:54:28,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 19:54:28,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-29 19:54:28,916 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) [2023-11-29 19:54:28,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 19:54:28,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:54:28,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 19:54:28,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 19:54:29,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 19:54:29,004 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 19:54:29,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818960032] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 19:54:29,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 19:54:29,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-29 19:54:29,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204559497] [2023-11-29 19:54:29,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 19:54:29,005 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 19:54:29,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 19:54:29,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 19:54:29,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 19:54:29,006 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 164 [2023-11-29 19:54:29,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 156 transitions, 406 flow. Second operand has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 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) [2023-11-29 19:54:29,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 19:54:29,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 164 [2023-11-29 19:54:29,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 19:54:29,592 INFO L124 PetriNetUnfolderBase]: 1794/5726 cut-off events. [2023-11-29 19:54:29,593 INFO L125 PetriNetUnfolderBase]: For 1540/1540 co-relation queries the response was YES. [2023-11-29 19:54:29,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10660 conditions, 5726 events. 1794/5726 cut-off events. For 1540/1540 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 53283 event pairs, 606 based on Foata normal form. 0/5218 useless extension candidates. Maximal degree in co-relation 1369. Up to 2360 conditions per place. [2023-11-29 19:54:29,610 INFO L140 encePairwiseOnDemand]: 158/164 looper letters, 26 selfloop transitions, 0 changer transitions 44/173 dead transitions. [2023-11-29 19:54:29,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 173 transitions, 580 flow [2023-11-29 19:54:29,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 19:54:29,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 19:54:29,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 399 transitions. [2023-11-29 19:54:29,611 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.8109756097560976 [2023-11-29 19:54:29,611 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 399 transitions. [2023-11-29 19:54:29,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 399 transitions. [2023-11-29 19:54:29,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 19:54:29,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 399 transitions. [2023-11-29 19:54:29,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 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) [2023-11-29 19:54:29,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 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) [2023-11-29 19:54:29,614 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 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) [2023-11-29 19:54:29,615 INFO L307 CegarLoopForPetriNet]: 147 programPoint places, 3 predicate places. [2023-11-29 19:54:29,616 INFO L500 AbstractCegarLoop]: Abstraction has has 150 places, 173 transitions, 580 flow [2023-11-29 19:54:29,616 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 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) [2023-11-29 19:54:29,616 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:54:29,616 INFO L232 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:54:29,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 19:54:29,834 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 19:54:29,834 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:54:29,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:54:29,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1005836503, now seen corresponding path program 1 times [2023-11-29 19:54:29,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:54:29,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746998463] [2023-11-29 19:54:29,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:54:29,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:54:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 19:54:29,860 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 19:54:29,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 19:54:29,913 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 19:54:29,913 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-11-29 19:54:29,913 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-29 19:54:29,914 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-29 19:54:29,914 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 19:54:29,914 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-29 19:54:29,914 WARN L227 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 19:54:29,914 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-29 19:54:29,942 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 19:54:29,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 197 transitions, 421 flow [2023-11-29 19:54:29,968 INFO L124 PetriNetUnfolderBase]: 62/431 cut-off events. [2023-11-29 19:54:29,968 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-29 19:54:29,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456 conditions, 431 events. 62/431 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1496 event pairs, 1 based on Foata normal form. 0/361 useless extension candidates. Maximal degree in co-relation 296. Up to 16 conditions per place. [2023-11-29 19:54:29,971 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 197 transitions, 421 flow [2023-11-29 19:54:29,973 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 197 transitions, 421 flow [2023-11-29 19:54:29,973 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 19:54:29,974 INFO L362 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@67e565bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 19:54:29,974 INFO L363 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-29 19:54:29,978 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 19:54:29,978 INFO L124 PetriNetUnfolderBase]: 8/108 cut-off events. [2023-11-29 19:54:29,978 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 19:54:29,978 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:54:29,978 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:54:29,978 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:54:29,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:54:29,979 INFO L85 PathProgramCache]: Analyzing trace with hash -541675613, now seen corresponding path program 1 times [2023-11-29 19:54:29,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:54:29,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728519337] [2023-11-29 19:54:29,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:54:29,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:54:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:54:30,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:54:30,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 19:54:30,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728519337] [2023-11-29 19:54:30,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728519337] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 19:54:30,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 19:54:30,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 19:54:30,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388060638] [2023-11-29 19:54:30,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 19:54:30,004 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 19:54:30,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 19:54:30,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 19:54:30,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 19:54:30,005 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 197 [2023-11-29 19:54:30,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 197 transitions, 421 flow. Second operand has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 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) [2023-11-29 19:54:30,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 19:54:30,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 197 [2023-11-29 19:54:30,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 19:54:32,942 INFO L124 PetriNetUnfolderBase]: 12166/32738 cut-off events. [2023-11-29 19:54:32,942 INFO L125 PetriNetUnfolderBase]: For 877/877 co-relation queries the response was YES. [2023-11-29 19:54:33,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50023 conditions, 32738 events. 12166/32738 cut-off events. For 877/877 co-relation queries the response was YES. Maximal size of possible extension queue 995. Compared 388256 event pairs, 7555 based on Foata normal form. 9203/40440 useless extension candidates. Maximal degree in co-relation 5982. Up to 16847 conditions per place. [2023-11-29 19:54:33,103 INFO L140 encePairwiseOnDemand]: 171/197 looper letters, 43 selfloop transitions, 2 changer transitions 3/183 dead transitions. [2023-11-29 19:54:33,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 183 transitions, 487 flow [2023-11-29 19:54:33,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 19:54:33,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 19:54:33,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 486 transitions. [2023-11-29 19:54:33,105 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.8223350253807107 [2023-11-29 19:54:33,105 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 486 transitions. [2023-11-29 19:54:33,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 486 transitions. [2023-11-29 19:54:33,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 19:54:33,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 486 transitions. [2023-11-29 19:54:33,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 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) [2023-11-29 19:54:33,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 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) [2023-11-29 19:54:33,108 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 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) [2023-11-29 19:54:33,108 INFO L307 CegarLoopForPetriNet]: 175 programPoint places, 1 predicate places. [2023-11-29 19:54:33,108 INFO L500 AbstractCegarLoop]: Abstraction has has 176 places, 183 transitions, 487 flow [2023-11-29 19:54:33,108 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 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) [2023-11-29 19:54:33,108 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:54:33,109 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:54:33,109 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 19:54:33,109 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:54:33,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:54:33,109 INFO L85 PathProgramCache]: Analyzing trace with hash 490860961, now seen corresponding path program 1 times [2023-11-29 19:54:33,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:54:33,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993850842] [2023-11-29 19:54:33,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:54:33,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:54:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:54:33,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:54:33,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 19:54:33,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993850842] [2023-11-29 19:54:33,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993850842] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 19:54:33,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853380471] [2023-11-29 19:54:33,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:54:33,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 19:54:33,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-29 19:54:33,181 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) [2023-11-29 19:54:33,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 19:54:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:54:33,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 19:54:33,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 19:54:33,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 19:54:33,295 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 19:54:33,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853380471] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 19:54:33,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 19:54:33,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-29 19:54:33,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250924066] [2023-11-29 19:54:33,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 19:54:33,296 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 19:54:33,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 19:54:33,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 19:54:33,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 19:54:33,297 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 197 [2023-11-29 19:54:33,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 183 transitions, 487 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 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) [2023-11-29 19:54:33,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 19:54:33,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 197 [2023-11-29 19:54:33,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 19:54:37,999 INFO L124 PetriNetUnfolderBase]: 19342/53589 cut-off events. [2023-11-29 19:54:38,000 INFO L125 PetriNetUnfolderBase]: For 12729/13513 co-relation queries the response was YES. [2023-11-29 19:54:38,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102344 conditions, 53589 events. 19342/53589 cut-off events. For 12729/13513 co-relation queries the response was YES. Maximal size of possible extension queue 1329. Compared 667950 event pairs, 9452 based on Foata normal form. 0/50274 useless extension candidates. Maximal degree in co-relation 11363. Up to 23653 conditions per place. [2023-11-29 19:54:38,308 INFO L140 encePairwiseOnDemand]: 191/197 looper letters, 33 selfloop transitions, 0 changer transitions 52/207 dead transitions. [2023-11-29 19:54:38,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 207 transitions, 722 flow [2023-11-29 19:54:38,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 19:54:38,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 19:54:38,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2023-11-29 19:54:38,310 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7969543147208121 [2023-11-29 19:54:38,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2023-11-29 19:54:38,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2023-11-29 19:54:38,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 19:54:38,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2023-11-29 19:54:38,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 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) [2023-11-29 19:54:38,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 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) [2023-11-29 19:54:38,312 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 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) [2023-11-29 19:54:38,314 INFO L307 CegarLoopForPetriNet]: 175 programPoint places, 3 predicate places. [2023-11-29 19:54:38,314 INFO L500 AbstractCegarLoop]: Abstraction has has 178 places, 207 transitions, 722 flow [2023-11-29 19:54:38,314 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 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) [2023-11-29 19:54:38,314 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:54:38,315 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:54:38,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 19:54:38,520 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 19:54:38,520 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:54:38,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:54:38,523 INFO L85 PathProgramCache]: Analyzing trace with hash -469278420, now seen corresponding path program 1 times [2023-11-29 19:54:38,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:54:38,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380463185] [2023-11-29 19:54:38,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:54:38,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:54:38,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:54:38,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:54:38,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 19:54:38,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380463185] [2023-11-29 19:54:38,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380463185] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 19:54:38,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801104371] [2023-11-29 19:54:38,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:54:38,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 19:54:38,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-29 19:54:38,616 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 19:54:38,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 19:54:38,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:54:38,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 19:54:38,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 19:54:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:54:38,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 19:54:38,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:54:38,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801104371] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 19:54:38,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 19:54:38,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-29 19:54:38,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978185847] [2023-11-29 19:54:38,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 19:54:38,808 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 19:54:38,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 19:54:38,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 19:54:38,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-29 19:54:38,810 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 197 [2023-11-29 19:54:38,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 207 transitions, 722 flow. Second operand has 10 states, 10 states have (on average 137.6) internal successors, (1376), 10 states have internal predecessors, (1376), 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) [2023-11-29 19:54:38,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 19:54:38,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 197 [2023-11-29 19:54:38,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 19:54:42,956 INFO L124 PetriNetUnfolderBase]: 19010/46573 cut-off events. [2023-11-29 19:54:42,956 INFO L125 PetriNetUnfolderBase]: For 37607/41058 co-relation queries the response was YES. [2023-11-29 19:54:43,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117735 conditions, 46573 events. 19010/46573 cut-off events. For 37607/41058 co-relation queries the response was YES. Maximal size of possible extension queue 1160. Compared 529184 event pairs, 946 based on Foata normal form. 9/43252 useless extension candidates. Maximal degree in co-relation 12714. Up to 23209 conditions per place. [2023-11-29 19:54:43,161 INFO L140 encePairwiseOnDemand]: 191/197 looper letters, 106 selfloop transitions, 9 changer transitions 52/280 dead transitions. [2023-11-29 19:54:43,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 280 transitions, 1428 flow [2023-11-29 19:54:43,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 19:54:43,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 19:54:43,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1338 transitions. [2023-11-29 19:54:43,163 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.754653130287648 [2023-11-29 19:54:43,163 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1338 transitions. [2023-11-29 19:54:43,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1338 transitions. [2023-11-29 19:54:43,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 19:54:43,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1338 transitions. [2023-11-29 19:54:43,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 148.66666666666666) internal successors, (1338), 9 states have internal predecessors, (1338), 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) [2023-11-29 19:54:43,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 197.0) internal successors, (1970), 10 states have internal predecessors, (1970), 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) [2023-11-29 19:54:43,169 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 197.0) internal successors, (1970), 10 states have internal predecessors, (1970), 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) [2023-11-29 19:54:43,170 INFO L307 CegarLoopForPetriNet]: 175 programPoint places, 11 predicate places. [2023-11-29 19:54:43,171 INFO L500 AbstractCegarLoop]: Abstraction has has 186 places, 280 transitions, 1428 flow [2023-11-29 19:54:43,171 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 137.6) internal successors, (1376), 10 states have internal predecessors, (1376), 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) [2023-11-29 19:54:43,171 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:54:43,171 INFO L232 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:54:43,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 19:54:43,375 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 19:54:43,376 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:54:43,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:54:43,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1143011462, now seen corresponding path program 1 times [2023-11-29 19:54:43,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:54:43,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381330132] [2023-11-29 19:54:43,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:54:43,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:54:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 19:54:43,394 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 19:54:43,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 19:54:43,416 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 19:54:43,416 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-11-29 19:54:43,417 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-29 19:54:43,417 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-29 19:54:43,417 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 19:54:43,417 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-29 19:54:43,417 WARN L227 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 19:54:43,417 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-29 19:54:43,442 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-29 19:54:43,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 230 transitions, 500 flow [2023-11-29 19:54:43,481 INFO L124 PetriNetUnfolderBase]: 96/646 cut-off events. [2023-11-29 19:54:43,481 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-29 19:54:43,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697 conditions, 646 events. 96/646 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2521 event pairs, 6 based on Foata normal form. 0/545 useless extension candidates. Maximal degree in co-relation 451. Up to 32 conditions per place. [2023-11-29 19:54:43,484 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 230 transitions, 500 flow [2023-11-29 19:54:43,486 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 230 transitions, 500 flow [2023-11-29 19:54:43,487 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 19:54:43,488 INFO L362 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@67e565bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 19:54:43,488 INFO L363 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-29 19:54:43,491 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 19:54:43,491 INFO L124 PetriNetUnfolderBase]: 8/103 cut-off events. [2023-11-29 19:54:43,491 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 19:54:43,491 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:54:43,491 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:54:43,491 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:54:43,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:54:43,491 INFO L85 PathProgramCache]: Analyzing trace with hash 444115747, now seen corresponding path program 1 times [2023-11-29 19:54:43,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:54:43,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160562534] [2023-11-29 19:54:43,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:54:43,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:54:43,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:54:43,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:54:43,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 19:54:43,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160562534] [2023-11-29 19:54:43,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160562534] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 19:54:43,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 19:54:43,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 19:54:43,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44041801] [2023-11-29 19:54:43,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 19:54:43,525 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 19:54:43,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 19:54:43,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 19:54:43,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 19:54:43,526 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 230 [2023-11-29 19:54:43,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 230 transitions, 500 flow. Second operand has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 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) [2023-11-29 19:54:43,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 19:54:43,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 230 [2023-11-29 19:54:43,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 19:55:10,822 INFO L124 PetriNetUnfolderBase]: 117417/267853 cut-off events. [2023-11-29 19:55:10,822 INFO L125 PetriNetUnfolderBase]: For 11989/11989 co-relation queries the response was YES. [2023-11-29 19:55:12,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 424537 conditions, 267853 events. 117417/267853 cut-off events. For 11989/11989 co-relation queries the response was YES. Maximal size of possible extension queue 6546. Compared 3713578 event pairs, 84882 based on Foata normal form. 86854/344671 useless extension candidates. Maximal degree in co-relation 50283. Up to 152541 conditions per place. [2023-11-29 19:55:13,426 INFO L140 encePairwiseOnDemand]: 198/230 looper letters, 51 selfloop transitions, 2 changer transitions 3/210 dead transitions. [2023-11-29 19:55:13,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 210 transitions, 570 flow [2023-11-29 19:55:13,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 19:55:13,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 19:55:13,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 557 transitions. [2023-11-29 19:55:13,428 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.8072463768115942 [2023-11-29 19:55:13,428 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 557 transitions. [2023-11-29 19:55:13,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 557 transitions. [2023-11-29 19:55:13,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 19:55:13,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 557 transitions. [2023-11-29 19:55:13,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 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) [2023-11-29 19:55:13,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 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) [2023-11-29 19:55:13,431 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 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) [2023-11-29 19:55:13,431 INFO L307 CegarLoopForPetriNet]: 203 programPoint places, 1 predicate places. [2023-11-29 19:55:13,431 INFO L500 AbstractCegarLoop]: Abstraction has has 204 places, 210 transitions, 570 flow [2023-11-29 19:55:13,431 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 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) [2023-11-29 19:55:13,431 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:55:13,431 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:55:13,432 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 19:55:13,432 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:55:13,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:55:13,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1345327936, now seen corresponding path program 1 times [2023-11-29 19:55:13,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:55:13,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71192790] [2023-11-29 19:55:13,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:55:13,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:55:13,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:55:13,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:55:13,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 19:55:13,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71192790] [2023-11-29 19:55:13,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71192790] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 19:55:13,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831582480] [2023-11-29 19:55:13,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:55:13,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 19:55:13,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-29 19:55:13,468 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 19:55:13,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 19:55:13,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:55:13,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 19:55:13,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 19:55:13,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 19:55:13,555 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 19:55:13,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831582480] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 19:55:13,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 19:55:13,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-29 19:55:13,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855922521] [2023-11-29 19:55:13,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 19:55:13,557 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 19:55:13,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 19:55:13,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 19:55:13,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 19:55:13,558 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 230 [2023-11-29 19:55:13,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 210 transitions, 570 flow. Second operand has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 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) [2023-11-29 19:55:13,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 19:55:13,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 230 [2023-11-29 19:55:13,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 19:55:59,517 INFO L124 PetriNetUnfolderBase]: 185668/422194 cut-off events. [2023-11-29 19:55:59,517 INFO L125 PetriNetUnfolderBase]: For 107617/115369 co-relation queries the response was YES. [2023-11-29 19:56:02,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868949 conditions, 422194 events. 185668/422194 cut-off events. For 107617/115369 co-relation queries the response was YES. Maximal size of possible extension queue 8700. Compared 6008459 event pairs, 105462 based on Foata normal form. 0/401370 useless extension candidates. Maximal degree in co-relation 102289. Up to 217538 conditions per place. [2023-11-29 19:56:03,506 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 40 selfloop transitions, 0 changer transitions 60/241 dead transitions. [2023-11-29 19:56:03,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 241 transitions, 866 flow [2023-11-29 19:56:03,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 19:56:03,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 19:56:03,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 543 transitions. [2023-11-29 19:56:03,509 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7869565217391304 [2023-11-29 19:56:03,509 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 543 transitions. [2023-11-29 19:56:03,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 543 transitions. [2023-11-29 19:56:03,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 19:56:03,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 543 transitions. [2023-11-29 19:56:03,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 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) [2023-11-29 19:56:03,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 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) [2023-11-29 19:56:03,512 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 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) [2023-11-29 19:56:03,513 INFO L307 CegarLoopForPetriNet]: 203 programPoint places, 3 predicate places. [2023-11-29 19:56:03,513 INFO L500 AbstractCegarLoop]: Abstraction has has 206 places, 241 transitions, 866 flow [2023-11-29 19:56:03,514 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 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) [2023-11-29 19:56:03,514 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:56:03,514 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:56:03,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 19:56:03,717 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 19:56:03,717 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:56:03,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:56:03,718 INFO L85 PathProgramCache]: Analyzing trace with hash 334738379, now seen corresponding path program 1 times [2023-11-29 19:56:03,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:56:03,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043220856] [2023-11-29 19:56:03,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:56:03,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:56:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:56:03,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:56:03,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 19:56:03,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043220856] [2023-11-29 19:56:03,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043220856] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 19:56:03,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998357518] [2023-11-29 19:56:03,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:56:03,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 19:56:03,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-29 19:56:03,828 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 19:56:03,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 19:56:03,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:56:03,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 19:56:03,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 19:56:04,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:56:04,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 19:56:04,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:56:04,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998357518] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 19:56:04,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 19:56:04,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-29 19:56:04,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657387520] [2023-11-29 19:56:04,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 19:56:04,039 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 19:56:04,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 19:56:04,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 19:56:04,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-29 19:56:04,041 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 230 [2023-11-29 19:56:04,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 241 transitions, 866 flow. Second operand has 10 states, 10 states have (on average 156.6) internal successors, (1566), 10 states have internal predecessors, (1566), 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) [2023-11-29 19:56:04,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 19:56:04,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 230 [2023-11-29 19:56:04,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 19:56:54,540 INFO L124 PetriNetUnfolderBase]: 193568/417950 cut-off events. [2023-11-29 19:56:54,540 INFO L125 PetriNetUnfolderBase]: For 345535/364109 co-relation queries the response was YES. [2023-11-29 19:56:56,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1108094 conditions, 417950 events. 193568/417950 cut-off events. For 345535/364109 co-relation queries the response was YES. Maximal size of possible extension queue 8255. Compared 5674844 event pairs, 15656 based on Foata normal form. 3/391998 useless extension candidates. Maximal degree in co-relation 125620. Up to 225326 conditions per place. [2023-11-29 19:56:58,368 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 119 selfloop transitions, 9 changer transitions 60/320 dead transitions. [2023-11-29 19:56:58,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 320 transitions, 1650 flow [2023-11-29 19:56:58,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 19:56:58,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 19:56:58,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1523 transitions. [2023-11-29 19:56:58,371 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7357487922705314 [2023-11-29 19:56:58,371 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1523 transitions. [2023-11-29 19:56:58,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1523 transitions. [2023-11-29 19:56:58,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 19:56:58,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1523 transitions. [2023-11-29 19:56:58,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 169.22222222222223) internal successors, (1523), 9 states have internal predecessors, (1523), 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) [2023-11-29 19:56:58,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 230.0) internal successors, (2300), 10 states have internal predecessors, (2300), 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) [2023-11-29 19:56:58,376 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 230.0) internal successors, (2300), 10 states have internal predecessors, (2300), 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) [2023-11-29 19:56:58,377 INFO L307 CegarLoopForPetriNet]: 203 programPoint places, 11 predicate places. [2023-11-29 19:56:58,377 INFO L500 AbstractCegarLoop]: Abstraction has has 214 places, 320 transitions, 1650 flow [2023-11-29 19:56:58,377 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 156.6) internal successors, (1566), 10 states have internal predecessors, (1566), 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) [2023-11-29 19:56:58,377 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:56:58,378 INFO L232 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:56:58,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 19:56:58,581 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 19:56:58,581 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:56:58,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:56:58,582 INFO L85 PathProgramCache]: Analyzing trace with hash 763237666, now seen corresponding path program 1 times [2023-11-29 19:56:58,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:56:58,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528441891] [2023-11-29 19:56:58,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:56:58,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:56:58,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 19:56:58,597 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 19:56:58,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 19:56:58,611 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 19:56:58,611 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-11-29 19:56:58,611 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-29 19:56:58,611 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-29 19:56:58,611 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 19:56:58,611 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-29 19:56:58,612 WARN L227 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 19:56:58,612 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-29 19:56:58,633 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-11-29 19:56:58,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 263 transitions, 581 flow [2023-11-29 19:56:58,707 INFO L124 PetriNetUnfolderBase]: 158/1009 cut-off events. [2023-11-29 19:56:58,707 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-29 19:56:58,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1115 conditions, 1009 events. 158/1009 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4630 event pairs, 23 based on Foata normal form. 0/861 useless extension candidates. Maximal degree in co-relation 691. Up to 80 conditions per place. [2023-11-29 19:56:58,715 INFO L82 GeneralOperation]: Start removeDead. Operand has 231 places, 263 transitions, 581 flow [2023-11-29 19:56:58,718 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 231 places, 263 transitions, 581 flow [2023-11-29 19:56:58,721 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 19:56:58,721 INFO L362 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@67e565bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 19:56:58,721 INFO L363 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-29 19:56:58,725 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 19:56:58,725 INFO L124 PetriNetUnfolderBase]: 8/106 cut-off events. [2023-11-29 19:56:58,725 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 19:56:58,725 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:56:58,725 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:56:58,725 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:56:58,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:56:58,725 INFO L85 PathProgramCache]: Analyzing trace with hash 170813923, now seen corresponding path program 1 times [2023-11-29 19:56:58,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:56:58,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138814928] [2023-11-29 19:56:58,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:56:58,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:56:58,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:56:58,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:56:58,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 19:56:58,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138814928] [2023-11-29 19:56:58,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138814928] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 19:56:58,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 19:56:58,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 19:56:58,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000544905] [2023-11-29 19:56:58,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 19:56:58,748 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 19:56:58,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 19:56:58,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 19:56:58,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 19:56:58,749 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 263 [2023-11-29 19:56:58,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 263 transitions, 581 flow. Second operand has 3 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 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) [2023-11-29 19:56:58,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 19:56:58,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 263 [2023-11-29 19:56:58,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand