/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -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/pthread-complex/workstealqueue_mutex-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-a20a710-m [2023-12-09 14:57:51,730 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-09 14:57:51,779 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 [2023-12-09 14:57:51,795 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-09 14:57:51,796 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-09 14:57:51,796 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-09 14:57:51,796 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-09 14:57:51,797 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-09 14:57:51,797 INFO L153 SettingsManager]: * Use SBE=true [2023-12-09 14:57:51,797 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-09 14:57:51,798 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-09 14:57:51,798 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-09 14:57:51,798 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-09 14:57:51,798 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-09 14:57:51,799 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-09 14:57:51,799 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-09 14:57:51,799 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-09 14:57:51,799 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-09 14:57:51,799 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-09 14:57:51,800 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-09 14:57:51,800 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-09 14:57:51,804 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-09 14:57:51,804 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-09 14:57:51,804 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-09 14:57:51,804 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-09 14:57:51,804 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-09 14:57:51,805 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-09 14:57:51,805 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-09 14:57:51,805 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-09 14:57:51,805 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-09 14:57:51,805 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-09 14:57:51,805 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-09 14:57:51,806 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-09 14:57:51,806 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true [2023-12-09 14:57:52,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-09 14:57:52,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-09 14:57:52,035 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-09 14:57:52,036 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-09 14:57:52,037 INFO L274 PluginConnector]: CDTParser initialized [2023-12-09 14:57:52,038 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i [2023-12-09 14:57:53,157 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-09 14:57:53,440 INFO L384 CDTParser]: Found 1 translation units. [2023-12-09 14:57:53,441 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i [2023-12-09 14:57:53,465 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09030207a/fed7f759ca784da7b062efc4328bc39a/FLAGa4bf00f4d [2023-12-09 14:57:53,475 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09030207a/fed7f759ca784da7b062efc4328bc39a [2023-12-09 14:57:53,477 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-09 14:57:53,479 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-09 14:57:53,479 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-09 14:57:53,480 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-09 14:57:53,483 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-09 14:57:53,483 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 02:57:53" (1/1) ... [2023-12-09 14:57:53,484 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@770704c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:57:53, skipping insertion in model container [2023-12-09 14:57:53,485 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 02:57:53" (1/1) ... [2023-12-09 14:57:53,536 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-09 14:57:54,002 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[76469,76482] [2023-12-09 14:57:54,037 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[79042,79055] [2023-12-09 14:57:54,041 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[79451,79464] [2023-12-09 14:57:54,053 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-09 14:57:54,065 INFO L202 MainTranslator]: Completed pre-run [2023-12-09 14:57:54,092 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[76469,76482] [2023-12-09 14:57:54,105 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[79042,79055] [2023-12-09 14:57:54,107 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[79451,79464] [2023-12-09 14:57:54,113 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-09 14:57:54,175 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-12-09 14:57:54,175 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-12-09 14:57:54,180 INFO L206 MainTranslator]: Completed translation [2023-12-09 14:57:54,181 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:57:54 WrapperNode [2023-12-09 14:57:54,181 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-09 14:57:54,182 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-09 14:57:54,182 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-09 14:57:54,182 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-09 14:57:54,187 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:57:54" (1/1) ... [2023-12-09 14:57:54,209 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:57:54" (1/1) ... [2023-12-09 14:57:54,273 INFO L138 Inliner]: procedures = 490, calls = 130, calls flagged for inlining = 45, calls inlined = 117, statements flattened = 1858 [2023-12-09 14:57:54,274 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-09 14:57:54,274 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-09 14:57:54,274 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-09 14:57:54,275 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-09 14:57:54,281 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:57:54" (1/1) ... [2023-12-09 14:57:54,282 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:57:54" (1/1) ... [2023-12-09 14:57:54,307 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:57:54" (1/1) ... [2023-12-09 14:57:54,308 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:57:54" (1/1) ... [2023-12-09 14:57:54,340 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:57:54" (1/1) ... [2023-12-09 14:57:54,346 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:57:54" (1/1) ... [2023-12-09 14:57:54,384 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:57:54" (1/1) ... [2023-12-09 14:57:54,390 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:57:54" (1/1) ... [2023-12-09 14:57:54,413 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-09 14:57:54,414 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-09 14:57:54,414 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-09 14:57:54,414 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-09 14:57:54,415 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:57:54" (1/1) ... [2023-12-09 14:57:54,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-09 14:57:54,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-09 14:57:54,458 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) [2023-12-09 14:57:54,465 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 [2023-12-09 14:57:54,481 INFO L130 BoogieDeclarations]: Found specification of procedure Stealer [2023-12-09 14:57:54,481 INFO L138 BoogieDeclarations]: Found implementation of procedure Stealer [2023-12-09 14:57:54,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-12-09 14:57:54,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-09 14:57:54,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-12-09 14:57:54,482 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-09 14:57:54,482 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-12-09 14:57:54,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-09 14:57:54,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-09 14:57:54,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-09 14:57:54,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-09 14:57:54,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-09 14:57:54,484 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-09 14:57:54,484 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-12-09 14:57:54,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-09 14:57:54,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-09 14:57:54,486 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-09 14:57:54,738 INFO L241 CfgBuilder]: Building ICFG [2023-12-09 14:57:54,740 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-09 14:57:56,164 INFO L282 CfgBuilder]: Performing block encoding [2023-12-09 14:57:56,423 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-09 14:57:56,423 INFO L309 CfgBuilder]: Removed 11 assume(true) statements. [2023-12-09 14:57:56,425 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:57:56 BoogieIcfgContainer [2023-12-09 14:57:56,425 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-09 14:57:56,428 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-09 14:57:56,429 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-09 14:57:56,431 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-09 14:57:56,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 02:57:53" (1/3) ... [2023-12-09 14:57:56,432 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ee1f3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 02:57:56, skipping insertion in model container [2023-12-09 14:57:56,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:57:54" (2/3) ... [2023-12-09 14:57:56,432 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ee1f3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 02:57:56, skipping insertion in model container [2023-12-09 14:57:56,433 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:57:56" (3/3) ... [2023-12-09 14:57:56,434 INFO L112 eAbstractionObserver]: Analyzing ICFG workstealqueue_mutex-2.i [2023-12-09 14:57:56,448 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-09 14:57:56,449 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-12-09 14:57:56,449 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-09 14:57:56,645 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-12-09 14:57:56,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1749 places, 1816 transitions, 3639 flow [2023-12-09 14:57:57,523 INFO L124 PetriNetUnfolderBase]: 131/3379 cut-off events. [2023-12-09 14:57:57,524 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-12-09 14:57:57,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3384 conditions, 3379 events. 131/3379 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 16199 event pairs, 0 based on Foata normal form. 0/3235 useless extension candidates. Maximal degree in co-relation 1730. Up to 6 conditions per place. [2023-12-09 14:57:57,559 INFO L82 GeneralOperation]: Start removeDead. Operand has 1749 places, 1816 transitions, 3639 flow [2023-12-09 14:57:57,580 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1749 places, 1816 transitions, 3639 flow [2023-12-09 14:57:57,592 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 14:57:57,600 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;@7e1a69e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 14:57:57,600 INFO L363 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-12-09 14:57:57,614 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 14:57:57,614 INFO L124 PetriNetUnfolderBase]: 11/170 cut-off events. [2023-12-09 14:57:57,614 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-09 14:57:57,614 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:57:57,615 INFO L233 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 14:57:57,615 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-12-09 14:57:57,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:57:57,620 INFO L85 PathProgramCache]: Analyzing trace with hash 2122468094, now seen corresponding path program 1 times [2023-12-09 14:57:57,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:57:57,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67230101] [2023-12-09 14:57:57,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:57:57,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:57:57,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:57:58,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-09 14:57:58,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:57:58,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67230101] [2023-12-09 14:57:58,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67230101] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 14:57:58,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 14:57:58,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-09 14:57:58,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049485928] [2023-12-09 14:57:58,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 14:57:58,021 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 14:57:58,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:57:58,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 14:57:58,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 14:57:58,051 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 1694 out of 1816 [2023-12-09 14:57:58,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1749 places, 1816 transitions, 3639 flow. Second operand has 3 states, 3 states have (on average 1698.0) internal successors, (5094), 3 states have internal predecessors, (5094), 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) [2023-12-09 14:57:58,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:57:58,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1694 of 1816 [2023-12-09 14:57:58,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:58:04,662 INFO L124 PetriNetUnfolderBase]: 1555/22660 cut-off events. [2023-12-09 14:58:04,662 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-12-09 14:58:04,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24542 conditions, 22660 events. 1555/22660 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 220857 event pairs, 396 based on Foata normal form. 368/22269 useless extension candidates. Maximal degree in co-relation 24354. Up to 960 conditions per place. [2023-12-09 14:58:04,878 INFO L140 encePairwiseOnDemand]: 1782/1816 looper letters, 163 selfloop transitions, 12 changer transitions 9/1873 dead transitions. [2023-12-09 14:58:04,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1746 places, 1873 transitions, 4111 flow [2023-12-09 14:58:04,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 14:58:04,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 14:58:04,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5299 transitions. [2023-12-09 14:58:04,901 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.9726505139500734 [2023-12-09 14:58:04,901 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 5299 transitions. [2023-12-09 14:58:04,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 5299 transitions. [2023-12-09 14:58:04,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:58:04,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 5299 transitions. [2023-12-09 14:58:04,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1766.3333333333333) internal successors, (5299), 3 states have internal predecessors, (5299), 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) [2023-12-09 14:58:04,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1816.0) internal successors, (7264), 4 states have internal predecessors, (7264), 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) [2023-12-09 14:58:04,936 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1816.0) internal successors, (7264), 4 states have internal predecessors, (7264), 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) [2023-12-09 14:58:04,939 INFO L308 CegarLoopForPetriNet]: 1749 programPoint places, -3 predicate places. [2023-12-09 14:58:04,939 INFO L500 AbstractCegarLoop]: Abstraction has has 1746 places, 1873 transitions, 4111 flow [2023-12-09 14:58:04,942 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1698.0) internal successors, (5094), 3 states have internal predecessors, (5094), 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) [2023-12-09 14:58:04,942 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:58:04,942 INFO L233 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 14:58:04,943 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-09 14:58:04,943 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-12-09 14:58:04,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:58:04,943 INFO L85 PathProgramCache]: Analyzing trace with hash -2020491056, now seen corresponding path program 1 times [2023-12-09 14:58:04,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:58:04,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122927551] [2023-12-09 14:58:04,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:58:04,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:58:04,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:58:05,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-09 14:58:05,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:58:05,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122927551] [2023-12-09 14:58:05,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122927551] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-09 14:58:05,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019481427] [2023-12-09 14:58:05,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:58:05,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-09 14:58:05,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-09 14:58:05,224 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) [2023-12-09 14:58:05,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-09 14:58:05,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:58:05,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-09 14:58:05,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-09 14:58:05,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-09 14:58:05,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-09 14:58:05,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-09 14:58:05,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019481427] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-09 14:58:05,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-09 14:58:05,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-09 14:58:05,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896257843] [2023-12-09 14:58:05,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-09 14:58:05,512 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-09 14:58:05,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:58:05,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-09 14:58:05,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-09 14:58:05,521 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 1693 out of 1816 [2023-12-09 14:58:05,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1746 places, 1873 transitions, 4111 flow. Second operand has 10 states, 10 states have (on average 1695.9) internal successors, (16959), 10 states have internal predecessors, (16959), 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) [2023-12-09 14:58:05,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:58:05,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1693 of 1816 [2023-12-09 14:58:05,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:58:12,837 INFO L124 PetriNetUnfolderBase]: 1555/22672 cut-off events. [2023-12-09 14:58:12,837 INFO L125 PetriNetUnfolderBase]: For 888/1126 co-relation queries the response was YES. [2023-12-09 14:58:12,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26443 conditions, 22672 events. 1555/22672 cut-off events. For 888/1126 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 221343 event pairs, 326 based on Foata normal form. 6/21926 useless extension candidates. Maximal degree in co-relation 26193. Up to 965 conditions per place. [2023-12-09 14:58:13,036 INFO L140 encePairwiseOnDemand]: 1795/1816 looper letters, 163 selfloop transitions, 26 changer transitions 9/1886 dead transitions. [2023-12-09 14:58:13,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1754 places, 1886 transitions, 4545 flow [2023-12-09 14:58:13,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-09 14:58:13,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-09 14:58:13,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 15432 transitions. [2023-12-09 14:58:13,057 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.9441997063142438 [2023-12-09 14:58:13,057 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 15432 transitions. [2023-12-09 14:58:13,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 15432 transitions. [2023-12-09 14:58:13,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:58:13,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 15432 transitions. [2023-12-09 14:58:13,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 1714.6666666666667) internal successors, (15432), 9 states have internal predecessors, (15432), 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) [2023-12-09 14:58:13,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1816.0) internal successors, (18160), 10 states have internal predecessors, (18160), 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) [2023-12-09 14:58:13,120 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1816.0) internal successors, (18160), 10 states have internal predecessors, (18160), 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) [2023-12-09 14:58:13,121 INFO L308 CegarLoopForPetriNet]: 1749 programPoint places, 5 predicate places. [2023-12-09 14:58:13,121 INFO L500 AbstractCegarLoop]: Abstraction has has 1754 places, 1886 transitions, 4545 flow [2023-12-09 14:58:13,125 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1695.9) internal successors, (16959), 10 states have internal predecessors, (16959), 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) [2023-12-09 14:58:13,126 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:58:13,126 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 14:58:13,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-09 14:58:13,334 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-09 14:58:13,335 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-12-09 14:58:13,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:58:13,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1670778636, now seen corresponding path program 2 times [2023-12-09 14:58:13,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:58:13,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194769086] [2023-12-09 14:58:13,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:58:13,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:58:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:58:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-09 14:58:13,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:58:13,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194769086] [2023-12-09 14:58:13,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194769086] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-09 14:58:13,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284655597] [2023-12-09 14:58:13,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-09 14:58:13,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-09 14:58:13,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-09 14:58:13,666 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) [2023-12-09 14:58:13,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-09 14:58:13,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-09 14:58:13,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-09 14:58:13,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-09 14:58:13,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-09 14:58:13,986 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-09 14:58:13,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-09 14:58:14,065 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-09 14:58:14,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284655597] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-09 14:58:14,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-09 14:58:14,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2023-12-09 14:58:14,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243155448] [2023-12-09 14:58:14,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-09 14:58:14,066 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-09 14:58:14,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:58:14,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-09 14:58:14,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-12-09 14:58:14,077 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 1693 out of 1816 [2023-12-09 14:58:14,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1754 places, 1886 transitions, 4545 flow. Second operand has 11 states, 11 states have (on average 1695.909090909091) internal successors, (18655), 11 states have internal predecessors, (18655), 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) [2023-12-09 14:58:14,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:58:14,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1693 of 1816 [2023-12-09 14:58:14,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:58:20,525 INFO L124 PetriNetUnfolderBase]: 1559/22809 cut-off events. [2023-12-09 14:58:20,534 INFO L125 PetriNetUnfolderBase]: For 2648/2980 co-relation queries the response was YES. [2023-12-09 14:58:20,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28478 conditions, 22809 events. 1559/22809 cut-off events. For 2648/2980 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 222150 event pairs, 331 based on Foata normal form. 12/22064 useless extension candidates. Maximal degree in co-relation 28159. Up to 969 conditions per place. [2023-12-09 14:58:20,791 INFO L140 encePairwiseOnDemand]: 1795/1816 looper letters, 165 selfloop transitions, 29 changer transitions 9/1891 dead transitions. [2023-12-09 14:58:20,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1765 places, 1891 transitions, 4969 flow [2023-12-09 14:58:20,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-09 14:58:20,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-12-09 14:58:20,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 20515 transitions. [2023-12-09 14:58:20,836 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.9414005139500734 [2023-12-09 14:58:20,836 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 20515 transitions. [2023-12-09 14:58:20,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 20515 transitions. [2023-12-09 14:58:20,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:58:20,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 20515 transitions. [2023-12-09 14:58:20,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 1709.5833333333333) internal successors, (20515), 12 states have internal predecessors, (20515), 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) [2023-12-09 14:58:20,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 1816.0) internal successors, (23608), 13 states have internal predecessors, (23608), 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) [2023-12-09 14:58:20,958 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 1816.0) internal successors, (23608), 13 states have internal predecessors, (23608), 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) [2023-12-09 14:58:20,959 INFO L308 CegarLoopForPetriNet]: 1749 programPoint places, 16 predicate places. [2023-12-09 14:58:20,960 INFO L500 AbstractCegarLoop]: Abstraction has has 1765 places, 1891 transitions, 4969 flow [2023-12-09 14:58:20,964 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1695.909090909091) internal successors, (18655), 11 states have internal predecessors, (18655), 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) [2023-12-09 14:58:20,964 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:58:20,964 INFO L233 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 14:58:20,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-09 14:58:21,186 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,SelfDestructingSolverStorable2 [2023-12-09 14:58:21,186 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-12-09 14:58:21,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:58:21,187 INFO L85 PathProgramCache]: Analyzing trace with hash 733145926, now seen corresponding path program 3 times [2023-12-09 14:58:21,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:58:21,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115369109] [2023-12-09 14:58:21,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:58:21,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:58:21,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:58:21,285 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-09 14:58:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:58:21,387 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-09 14:58:21,387 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-09 14:58:21,388 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-12-09 14:58:21,389 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-12-09 14:58:21,389 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-12-09 14:58:21,389 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-12-09 14:58:21,390 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-12-09 14:58:21,390 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-12-09 14:58:21,390 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-09 14:58:21,390 INFO L457 BasicCegarLoop]: Path program histogram: [3, 1] [2023-12-09 14:58:21,392 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-09 14:58:21,393 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-09 14:58:21,488 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-12-09 14:58:21,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1908 places, 1980 transitions, 3976 flow [2023-12-09 14:58:22,855 INFO L124 PetriNetUnfolderBase]: 204/5151 cut-off events. [2023-12-09 14:58:22,855 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-12-09 14:58:22,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5163 conditions, 5151 events. 204/5151 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 30581 event pairs, 0 based on Foata normal form. 0/4927 useless extension candidates. Maximal degree in co-relation 3381. Up to 9 conditions per place. [2023-12-09 14:58:22,955 INFO L82 GeneralOperation]: Start removeDead. Operand has 1908 places, 1980 transitions, 3976 flow [2023-12-09 14:58:22,972 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1908 places, 1980 transitions, 3976 flow [2023-12-09 14:58:22,973 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 14:58:22,974 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;@7e1a69e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 14:58:22,974 INFO L363 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-12-09 14:58:22,981 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 14:58:22,981 INFO L124 PetriNetUnfolderBase]: 11/194 cut-off events. [2023-12-09 14:58:22,982 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-12-09 14:58:22,982 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:58:22,982 INFO L233 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 14:58:22,982 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-12-09 14:58:22,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:58:22,982 INFO L85 PathProgramCache]: Analyzing trace with hash 401463932, now seen corresponding path program 1 times [2023-12-09 14:58:22,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:58:22,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668751223] [2023-12-09 14:58:22,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:58:22,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:58:22,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:58:23,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 14:58:23,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:58:23,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668751223] [2023-12-09 14:58:23,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668751223] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 14:58:23,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 14:58:23,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-09 14:58:23,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288985643] [2023-12-09 14:58:23,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 14:58:23,040 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 14:58:23,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:58:23,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 14:58:23,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 14:58:23,045 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 1849 out of 1980 [2023-12-09 14:58:23,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1908 places, 1980 transitions, 3976 flow. Second operand has 3 states, 3 states have (on average 1854.6666666666667) internal successors, (5564), 3 states have internal predecessors, (5564), 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) [2023-12-09 14:58:23,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:58:23,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1849 of 1980 [2023-12-09 14:58:23,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:59:28,250 INFO L124 PetriNetUnfolderBase]: 18091/187742 cut-off events. [2023-12-09 14:59:28,251 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2023-12-09 14:59:31,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208524 conditions, 187742 events. 18091/187742 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 752. Compared 2859514 event pairs, 6166 based on Foata normal form. 3894/185124 useless extension candidates. Maximal degree in co-relation 155417. Up to 10825 conditions per place. [2023-12-09 14:59:32,166 INFO L140 encePairwiseOnDemand]: 1945/1980 looper letters, 187 selfloop transitions, 12 changer transitions 0/2048 dead transitions. [2023-12-09 14:59:32,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1905 places, 2048 transitions, 4516 flow [2023-12-09 14:59:32,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 14:59:32,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 14:59:32,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5786 transitions. [2023-12-09 14:59:32,175 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.9740740740740741 [2023-12-09 14:59:32,175 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 5786 transitions. [2023-12-09 14:59:32,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 5786 transitions. [2023-12-09 14:59:32,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:59:32,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 5786 transitions. [2023-12-09 14:59:32,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1928.6666666666667) internal successors, (5786), 3 states have internal predecessors, (5786), 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) [2023-12-09 14:59:32,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1980.0) internal successors, (7920), 4 states have internal predecessors, (7920), 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) [2023-12-09 14:59:32,186 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1980.0) internal successors, (7920), 4 states have internal predecessors, (7920), 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) [2023-12-09 14:59:32,187 INFO L308 CegarLoopForPetriNet]: 1908 programPoint places, -3 predicate places. [2023-12-09 14:59:32,187 INFO L500 AbstractCegarLoop]: Abstraction has has 1905 places, 2048 transitions, 4516 flow [2023-12-09 14:59:32,188 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1854.6666666666667) internal successors, (5564), 3 states have internal predecessors, (5564), 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) [2023-12-09 14:59:32,188 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:59:32,188 INFO L233 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 14:59:32,188 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-09 14:59:32,189 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-12-09 14:59:32,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:59:32,189 INFO L85 PathProgramCache]: Analyzing trace with hash -559386666, now seen corresponding path program 1 times [2023-12-09 14:59:32,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:59:32,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800530279] [2023-12-09 14:59:32,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:59:32,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:59:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:59:32,284 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-09 14:59:32,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:59:32,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800530279] [2023-12-09 14:59:32,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800530279] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-09 14:59:32,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267102124] [2023-12-09 14:59:32,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:59:32,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-09 14:59:32,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-09 14:59:32,287 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) [2023-12-09 14:59:32,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-09 14:59:32,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:59:32,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-09 14:59:32,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-09 14:59:32,517 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-09 14:59:32,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-09 14:59:32,544 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-09 14:59:32,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267102124] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-09 14:59:32,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-09 14:59:32,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-09 14:59:32,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675839596] [2023-12-09 14:59:32,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-09 14:59:32,547 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-09 14:59:32,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:59:32,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-09 14:59:32,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-09 14:59:32,556 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 1848 out of 1980 [2023-12-09 14:59:32,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1905 places, 2048 transitions, 4516 flow. Second operand has 10 states, 10 states have (on average 1851.0) internal successors, (18510), 10 states have internal predecessors, (18510), 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) [2023-12-09 14:59:32,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:59:32,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1848 of 1980 [2023-12-09 14:59:32,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand