/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/parallel-misc-5.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 14:30:20,816 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 14:30:20,854 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-VariableLbe.epf [2023-08-24 14:30:20,857 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 14:30:20,857 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 14:30:20,871 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 14:30:20,871 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 14:30:20,872 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 14:30:20,872 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 14:30:20,872 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 14:30:20,872 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 14:30:20,873 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 14:30:20,873 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 14:30:20,873 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 14:30:20,873 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 14:30:20,874 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 14:30:20,874 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 14:30:20,874 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 14:30:20,874 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 14:30:20,874 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 14:30:20,874 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 14:30:20,875 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 14:30:20,875 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 14:30:20,875 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 14:30:20,875 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 14:30:20,875 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 14:30:20,876 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 14:30:20,876 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 14:30:20,876 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 14:30:20,876 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 14:30:20,876 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 14:30:20,876 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 14:30:20,877 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 14:30:20,877 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 14:30:20,877 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 14:30:20,877 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 14:30:21,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 14:30:21,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 14:30:21,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 14:30:21,147 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 14:30:21,147 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 14:30:21,149 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-5.wvr.c [2023-08-24 14:30:22,173 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 14:30:22,330 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 14:30:22,331 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-5.wvr.c [2023-08-24 14:30:22,339 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb6349241/9164b97ee7114cbca79a8406ba9f0b41/FLAG6cbd365d6 [2023-08-24 14:30:22,357 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb6349241/9164b97ee7114cbca79a8406ba9f0b41 [2023-08-24 14:30:22,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 14:30:22,363 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 14:30:22,365 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 14:30:22,365 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 14:30:22,367 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 14:30:22,368 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:30:22" (1/1) ... [2023-08-24 14:30:22,369 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26b55bc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:30:22, skipping insertion in model container [2023-08-24 14:30:22,369 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:30:22" (1/1) ... [2023-08-24 14:30:22,385 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 14:30:22,513 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-5.wvr.c[3027,3040] [2023-08-24 14:30:22,516 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 14:30:22,522 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 14:30:22,543 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-5.wvr.c[3027,3040] [2023-08-24 14:30:22,544 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 14:30:22,548 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 14:30:22,548 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 14:30:22,553 INFO L206 MainTranslator]: Completed translation [2023-08-24 14:30:22,553 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:30:22 WrapperNode [2023-08-24 14:30:22,553 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 14:30:22,554 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 14:30:22,554 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 14:30:22,554 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 14:30:22,558 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:30:22" (1/1) ... [2023-08-24 14:30:22,562 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:30:22" (1/1) ... [2023-08-24 14:30:22,576 INFO L138 Inliner]: procedures = 22, calls = 45, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 149 [2023-08-24 14:30:22,576 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 14:30:22,576 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 14:30:22,576 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 14:30:22,577 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 14:30:22,581 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:30:22" (1/1) ... [2023-08-24 14:30:22,581 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:30:22" (1/1) ... [2023-08-24 14:30:22,583 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:30:22" (1/1) ... [2023-08-24 14:30:22,583 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:30:22" (1/1) ... [2023-08-24 14:30:22,586 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:30:22" (1/1) ... [2023-08-24 14:30:22,588 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:30:22" (1/1) ... [2023-08-24 14:30:22,589 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:30:22" (1/1) ... [2023-08-24 14:30:22,589 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:30:22" (1/1) ... [2023-08-24 14:30:22,591 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 14:30:22,591 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 14:30:22,591 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 14:30:22,592 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 14:30:22,592 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:30:22" (1/1) ... [2023-08-24 14:30:22,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 14:30:22,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:30:22,614 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) [2023-08-24 14:30:22,646 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 [2023-08-24 14:30:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 14:30:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 14:30:22,655 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 14:30:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 14:30:22,655 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 14:30:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 14:30:22,655 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 14:30:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 14:30:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 14:30:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 14:30:22,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 14:30:22,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 14:30:22,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 14:30:22,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 14:30:22,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 14:30:22,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 14:30:22,658 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 14:30:22,736 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 14:30:22,737 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 14:30:22,925 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 14:30:22,963 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 14:30:22,963 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-24 14:30:22,965 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:30:22 BoogieIcfgContainer [2023-08-24 14:30:22,965 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 14:30:22,966 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 14:30:22,966 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 14:30:22,968 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 14:30:22,968 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 02:30:22" (1/3) ... [2023-08-24 14:30:22,969 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b2e1eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:30:22, skipping insertion in model container [2023-08-24 14:30:22,969 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:30:22" (2/3) ... [2023-08-24 14:30:22,969 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b2e1eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:30:22, skipping insertion in model container [2023-08-24 14:30:22,969 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:30:22" (3/3) ... [2023-08-24 14:30:22,970 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-5.wvr.c [2023-08-24 14:30:22,981 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 14:30:22,981 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 14:30:22,982 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 14:30:23,055 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 14:30:23,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 109 transitions, 242 flow [2023-08-24 14:30:23,119 INFO L124 PetriNetUnfolderBase]: 7/106 cut-off events. [2023-08-24 14:30:23,119 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 14:30:23,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 106 events. 7/106 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 84 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 84. Up to 2 conditions per place. [2023-08-24 14:30:23,126 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 109 transitions, 242 flow [2023-08-24 14:30:23,128 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 96 transitions, 210 flow [2023-08-24 14:30:23,131 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 14:30:23,140 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 96 transitions, 210 flow [2023-08-24 14:30:23,142 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 96 transitions, 210 flow [2023-08-24 14:30:23,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 96 transitions, 210 flow [2023-08-24 14:30:23,186 INFO L124 PetriNetUnfolderBase]: 7/96 cut-off events. [2023-08-24 14:30:23,186 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 14:30:23,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 96 events. 7/96 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 85 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 84. Up to 2 conditions per place. [2023-08-24 14:30:23,188 INFO L119 LiptonReduction]: Number of co-enabled transitions 1370 [2023-08-24 14:30:25,802 INFO L134 LiptonReduction]: Checked pairs total: 1979 [2023-08-24 14:30:25,802 INFO L136 LiptonReduction]: Total number of compositions: 79 [2023-08-24 14:30:25,816 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 14:30:25,835 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@388cdd76, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 14:30:25,836 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 14:30:25,847 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 14:30:25,847 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2023-08-24 14:30:25,847 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 14:30:25,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:30:25,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:30:25,848 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:30:25,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:30:25,852 INFO L85 PathProgramCache]: Analyzing trace with hash -771544553, now seen corresponding path program 1 times [2023-08-24 14:30:25,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:30:25,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490279186] [2023-08-24 14:30:25,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:30:25,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:30:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:30:26,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:26,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:30:26,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490279186] [2023-08-24 14:30:26,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490279186] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:30:26,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:30:26,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 14:30:26,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714934810] [2023-08-24 14:30:26,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:30:26,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 14:30:26,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:30:26,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 14:30:26,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 14:30:26,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 188 [2023-08-24 14:30:26,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 22 transitions, 62 flow. Second operand has 5 states, 5 states have (on average 86.6) internal successors, (433), 5 states have internal predecessors, (433), 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) [2023-08-24 14:30:26,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:30:26,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 188 [2023-08-24 14:30:26,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:30:26,548 INFO L124 PetriNetUnfolderBase]: 433/696 cut-off events. [2023-08-24 14:30:26,549 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2023-08-24 14:30:26,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1488 conditions, 696 events. 433/696 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2628 event pairs, 74 based on Foata normal form. 0/578 useless extension candidates. Maximal degree in co-relation 1212. Up to 359 conditions per place. [2023-08-24 14:30:26,552 INFO L140 encePairwiseOnDemand]: 181/188 looper letters, 55 selfloop transitions, 5 changer transitions 22/82 dead transitions. [2023-08-24 14:30:26,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 82 transitions, 382 flow [2023-08-24 14:30:26,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 14:30:26,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 14:30:26,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 665 transitions. [2023-08-24 14:30:26,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5053191489361702 [2023-08-24 14:30:26,563 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 665 transitions. [2023-08-24 14:30:26,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 665 transitions. [2023-08-24 14:30:26,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:30:26,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 665 transitions. [2023-08-24 14:30:26,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 95.0) internal successors, (665), 7 states have internal predecessors, (665), 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) [2023-08-24 14:30:26,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 188.0) internal successors, (1504), 8 states have internal predecessors, (1504), 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) [2023-08-24 14:30:26,574 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 188.0) internal successors, (1504), 8 states have internal predecessors, (1504), 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) [2023-08-24 14:30:26,575 INFO L175 Difference]: Start difference. First operand has 30 places, 22 transitions, 62 flow. Second operand 7 states and 665 transitions. [2023-08-24 14:30:26,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 82 transitions, 382 flow [2023-08-24 14:30:26,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 82 transitions, 346 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-24 14:30:26,583 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 99 flow [2023-08-24 14:30:26,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=99, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2023-08-24 14:30:26,588 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-08-24 14:30:26,588 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 99 flow [2023-08-24 14:30:26,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 86.6) internal successors, (433), 5 states have internal predecessors, (433), 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) [2023-08-24 14:30:26,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:30:26,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:30:26,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 14:30:26,589 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:30:26,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:30:26,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1549483573, now seen corresponding path program 2 times [2023-08-24 14:30:26,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:30:26,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463897587] [2023-08-24 14:30:26,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:30:26,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:30:26,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:30:26,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:26,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:30:26,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463897587] [2023-08-24 14:30:26,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463897587] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:30:26,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:30:26,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 14:30:26,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943967780] [2023-08-24 14:30:26,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:30:26,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 14:30:26,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:30:26,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 14:30:26,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 14:30:26,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 188 [2023-08-24 14:30:26,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 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) [2023-08-24 14:30:26,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:30:26,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 188 [2023-08-24 14:30:26,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:30:26,814 INFO L124 PetriNetUnfolderBase]: 260/443 cut-off events. [2023-08-24 14:30:26,814 INFO L125 PetriNetUnfolderBase]: For 497/497 co-relation queries the response was YES. [2023-08-24 14:30:26,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1373 conditions, 443 events. 260/443 cut-off events. For 497/497 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1576 event pairs, 21 based on Foata normal form. 32/475 useless extension candidates. Maximal degree in co-relation 940. Up to 239 conditions per place. [2023-08-24 14:30:26,818 INFO L140 encePairwiseOnDemand]: 184/188 looper letters, 40 selfloop transitions, 6 changer transitions 0/46 dead transitions. [2023-08-24 14:30:26,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 46 transitions, 280 flow [2023-08-24 14:30:26,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 14:30:26,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 14:30:26,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 381 transitions. [2023-08-24 14:30:26,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5066489361702128 [2023-08-24 14:30:26,822 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 381 transitions. [2023-08-24 14:30:26,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 381 transitions. [2023-08-24 14:30:26,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:30:26,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 381 transitions. [2023-08-24 14:30:26,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 95.25) internal successors, (381), 4 states have internal predecessors, (381), 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) [2023-08-24 14:30:26,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 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) [2023-08-24 14:30:26,826 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 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) [2023-08-24 14:30:26,826 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 99 flow. Second operand 4 states and 381 transitions. [2023-08-24 14:30:26,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 46 transitions, 280 flow [2023-08-24 14:30:26,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 46 transitions, 265 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-24 14:30:26,828 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 124 flow [2023-08-24 14:30:26,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-08-24 14:30:26,828 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-08-24 14:30:26,828 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 124 flow [2023-08-24 14:30:26,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 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) [2023-08-24 14:30:26,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:30:26,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:30:26,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 14:30:26,829 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:30:26,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:30:26,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1618678763, now seen corresponding path program 3 times [2023-08-24 14:30:26,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:30:26,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196637783] [2023-08-24 14:30:26,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:30:26,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:30:26,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:30:26,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:26,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:30:26,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196637783] [2023-08-24 14:30:26,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196637783] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:30:26,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:30:26,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 14:30:26,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772709868] [2023-08-24 14:30:26,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:30:26,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 14:30:26,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:30:26,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 14:30:26,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 14:30:26,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 188 [2023-08-24 14:30:26,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 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) [2023-08-24 14:30:26,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:30:26,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 188 [2023-08-24 14:30:26,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:30:26,991 INFO L124 PetriNetUnfolderBase]: 215/378 cut-off events. [2023-08-24 14:30:26,991 INFO L125 PetriNetUnfolderBase]: For 443/443 co-relation queries the response was YES. [2023-08-24 14:30:26,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1216 conditions, 378 events. 215/378 cut-off events. For 443/443 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1264 event pairs, 37 based on Foata normal form. 20/398 useless extension candidates. Maximal degree in co-relation 907. Up to 229 conditions per place. [2023-08-24 14:30:26,993 INFO L140 encePairwiseOnDemand]: 184/188 looper letters, 36 selfloop transitions, 7 changer transitions 2/45 dead transitions. [2023-08-24 14:30:26,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 45 transitions, 293 flow [2023-08-24 14:30:26,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 14:30:26,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 14:30:26,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 377 transitions. [2023-08-24 14:30:26,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013297872340425 [2023-08-24 14:30:26,994 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 377 transitions. [2023-08-24 14:30:26,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 377 transitions. [2023-08-24 14:30:26,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:30:26,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 377 transitions. [2023-08-24 14:30:26,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.25) internal successors, (377), 4 states have internal predecessors, (377), 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) [2023-08-24 14:30:26,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 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) [2023-08-24 14:30:26,997 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 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) [2023-08-24 14:30:26,997 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 124 flow. Second operand 4 states and 377 transitions. [2023-08-24 14:30:26,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 45 transitions, 293 flow [2023-08-24 14:30:27,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 45 transitions, 285 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 14:30:27,001 INFO L231 Difference]: Finished difference. Result has 39 places, 31 transitions, 156 flow [2023-08-24 14:30:27,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=39, PETRI_TRANSITIONS=31} [2023-08-24 14:30:27,002 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2023-08-24 14:30:27,004 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 31 transitions, 156 flow [2023-08-24 14:30:27,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 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) [2023-08-24 14:30:27,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:30:27,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:30:27,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 14:30:27,005 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:30:27,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:30:27,005 INFO L85 PathProgramCache]: Analyzing trace with hash 994832979, now seen corresponding path program 4 times [2023-08-24 14:30:27,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:30:27,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619976314] [2023-08-24 14:30:27,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:30:27,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:30:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:30:27,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:27,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:30:27,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619976314] [2023-08-24 14:30:27,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619976314] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:30:27,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:30:27,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 14:30:27,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300945966] [2023-08-24 14:30:27,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:30:27,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 14:30:27,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:30:27,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 14:30:27,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 14:30:27,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 188 [2023-08-24 14:30:27,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 88.6) internal successors, (443), 5 states have internal predecessors, (443), 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) [2023-08-24 14:30:27,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:30:27,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 188 [2023-08-24 14:30:27,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:30:27,196 INFO L124 PetriNetUnfolderBase]: 221/380 cut-off events. [2023-08-24 14:30:27,196 INFO L125 PetriNetUnfolderBase]: For 728/728 co-relation queries the response was YES. [2023-08-24 14:30:27,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1335 conditions, 380 events. 221/380 cut-off events. For 728/728 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1254 event pairs, 25 based on Foata normal form. 12/392 useless extension candidates. Maximal degree in co-relation 901. Up to 152 conditions per place. [2023-08-24 14:30:27,198 INFO L140 encePairwiseOnDemand]: 182/188 looper letters, 42 selfloop transitions, 10 changer transitions 0/52 dead transitions. [2023-08-24 14:30:27,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 52 transitions, 364 flow [2023-08-24 14:30:27,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 14:30:27,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 14:30:27,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 470 transitions. [2023-08-24 14:30:27,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-24 14:30:27,199 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 470 transitions. [2023-08-24 14:30:27,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 470 transitions. [2023-08-24 14:30:27,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:30:27,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 470 transitions. [2023-08-24 14:30:27,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.0) internal successors, (470), 5 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) [2023-08-24 14:30:27,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 188.0) internal successors, (1128), 6 states have internal predecessors, (1128), 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) [2023-08-24 14:30:27,203 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 188.0) internal successors, (1128), 6 states have internal predecessors, (1128), 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) [2023-08-24 14:30:27,203 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 156 flow. Second operand 5 states and 470 transitions. [2023-08-24 14:30:27,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 52 transitions, 364 flow [2023-08-24 14:30:27,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 52 transitions, 350 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-24 14:30:27,206 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 202 flow [2023-08-24 14:30:27,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2023-08-24 14:30:27,207 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2023-08-24 14:30:27,207 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 202 flow [2023-08-24 14:30:27,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 88.6) internal successors, (443), 5 states have internal predecessors, (443), 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) [2023-08-24 14:30:27,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:30:27,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:30:27,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 14:30:27,207 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:30:27,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:30:27,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1341965203, now seen corresponding path program 5 times [2023-08-24 14:30:27,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:30:27,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218138589] [2023-08-24 14:30:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:30:27,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:30:27,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:30:27,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:27,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:30:27,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218138589] [2023-08-24 14:30:27,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218138589] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:30:27,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:30:27,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 14:30:27,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013467659] [2023-08-24 14:30:27,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:30:27,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 14:30:27,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:30:27,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 14:30:27,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 14:30:27,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 188 [2023-08-24 14:30:27,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 202 flow. Second operand has 5 states, 5 states have (on average 86.6) internal successors, (433), 5 states have internal predecessors, (433), 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) [2023-08-24 14:30:27,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:30:27,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 188 [2023-08-24 14:30:27,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:30:27,458 INFO L124 PetriNetUnfolderBase]: 211/348 cut-off events. [2023-08-24 14:30:27,458 INFO L125 PetriNetUnfolderBase]: For 950/950 co-relation queries the response was YES. [2023-08-24 14:30:27,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1362 conditions, 348 events. 211/348 cut-off events. For 950/950 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1100 event pairs, 25 based on Foata normal form. 10/358 useless extension candidates. Maximal degree in co-relation 981. Up to 246 conditions per place. [2023-08-24 14:30:27,460 INFO L140 encePairwiseOnDemand]: 181/188 looper letters, 34 selfloop transitions, 3 changer transitions 18/55 dead transitions. [2023-08-24 14:30:27,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 55 transitions, 416 flow [2023-08-24 14:30:27,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 14:30:27,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 14:30:27,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 631 transitions. [2023-08-24 14:30:27,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.479483282674772 [2023-08-24 14:30:27,462 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 631 transitions. [2023-08-24 14:30:27,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 631 transitions. [2023-08-24 14:30:27,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:30:27,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 631 transitions. [2023-08-24 14:30:27,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 90.14285714285714) internal successors, (631), 7 states have internal predecessors, (631), 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) [2023-08-24 14:30:27,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 188.0) internal successors, (1504), 8 states have internal predecessors, (1504), 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) [2023-08-24 14:30:27,466 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 188.0) internal successors, (1504), 8 states have internal predecessors, (1504), 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) [2023-08-24 14:30:27,466 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 202 flow. Second operand 7 states and 631 transitions. [2023-08-24 14:30:27,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 55 transitions, 416 flow [2023-08-24 14:30:27,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 55 transitions, 406 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 14:30:27,469 INFO L231 Difference]: Finished difference. Result has 52 places, 30 transitions, 168 flow [2023-08-24 14:30:27,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=168, PETRI_PLACES=52, PETRI_TRANSITIONS=30} [2023-08-24 14:30:27,471 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 22 predicate places. [2023-08-24 14:30:27,471 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 30 transitions, 168 flow [2023-08-24 14:30:27,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 86.6) internal successors, (433), 5 states have internal predecessors, (433), 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) [2023-08-24 14:30:27,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:30:27,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:30:27,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 14:30:27,471 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:30:27,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:30:27,472 INFO L85 PathProgramCache]: Analyzing trace with hash -866873979, now seen corresponding path program 1 times [2023-08-24 14:30:27,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:30:27,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708133842] [2023-08-24 14:30:27,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:30:27,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:30:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:30:27,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:27,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:30:27,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708133842] [2023-08-24 14:30:27,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708133842] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:30:27,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:30:27,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 14:30:27,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407596427] [2023-08-24 14:30:27,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:30:27,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 14:30:27,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:30:27,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 14:30:27,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 14:30:27,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 188 [2023-08-24 14:30:27,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 30 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 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) [2023-08-24 14:30:27,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:30:27,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 188 [2023-08-24 14:30:27,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:30:27,760 INFO L124 PetriNetUnfolderBase]: 326/529 cut-off events. [2023-08-24 14:30:27,760 INFO L125 PetriNetUnfolderBase]: For 1315/1315 co-relation queries the response was YES. [2023-08-24 14:30:27,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2149 conditions, 529 events. 326/529 cut-off events. For 1315/1315 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1843 event pairs, 14 based on Foata normal form. 16/545 useless extension candidates. Maximal degree in co-relation 2038. Up to 187 conditions per place. [2023-08-24 14:30:27,763 INFO L140 encePairwiseOnDemand]: 179/188 looper letters, 67 selfloop transitions, 36 changer transitions 0/103 dead transitions. [2023-08-24 14:30:27,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 103 transitions, 808 flow [2023-08-24 14:30:27,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 14:30:27,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 14:30:27,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 836 transitions. [2023-08-24 14:30:27,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4940898345153664 [2023-08-24 14:30:27,765 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 836 transitions. [2023-08-24 14:30:27,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 836 transitions. [2023-08-24 14:30:27,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:30:27,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 836 transitions. [2023-08-24 14:30:27,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 92.88888888888889) internal successors, (836), 9 states have internal predecessors, (836), 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) [2023-08-24 14:30:27,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 188.0) internal successors, (1880), 10 states have internal predecessors, (1880), 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) [2023-08-24 14:30:27,768 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 188.0) internal successors, (1880), 10 states have internal predecessors, (1880), 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) [2023-08-24 14:30:27,768 INFO L175 Difference]: Start difference. First operand has 52 places, 30 transitions, 168 flow. Second operand 9 states and 836 transitions. [2023-08-24 14:30:27,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 103 transitions, 808 flow [2023-08-24 14:30:27,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 103 transitions, 752 flow, removed 22 selfloop flow, removed 7 redundant places. [2023-08-24 14:30:27,772 INFO L231 Difference]: Finished difference. Result has 55 places, 61 transitions, 531 flow [2023-08-24 14:30:27,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=531, PETRI_PLACES=55, PETRI_TRANSITIONS=61} [2023-08-24 14:30:27,773 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2023-08-24 14:30:27,773 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 61 transitions, 531 flow [2023-08-24 14:30:27,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 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) [2023-08-24 14:30:27,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:30:27,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:30:27,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 14:30:27,773 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:30:27,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:30:27,774 INFO L85 PathProgramCache]: Analyzing trace with hash -2078671299, now seen corresponding path program 2 times [2023-08-24 14:30:27,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:30:27,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142697737] [2023-08-24 14:30:27,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:30:27,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:30:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:30:27,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:27,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:30:27,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142697737] [2023-08-24 14:30:27,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142697737] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:30:27,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:30:27,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 14:30:27,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932259599] [2023-08-24 14:30:27,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:30:27,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 14:30:27,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:30:27,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 14:30:27,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 14:30:27,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 188 [2023-08-24 14:30:27,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 61 transitions, 531 flow. Second operand has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 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) [2023-08-24 14:30:27,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:30:27,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 188 [2023-08-24 14:30:27,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:30:28,157 INFO L124 PetriNetUnfolderBase]: 474/831 cut-off events. [2023-08-24 14:30:28,158 INFO L125 PetriNetUnfolderBase]: For 5137/5137 co-relation queries the response was YES. [2023-08-24 14:30:28,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4396 conditions, 831 events. 474/831 cut-off events. For 5137/5137 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3449 event pairs, 39 based on Foata normal form. 20/851 useless extension candidates. Maximal degree in co-relation 3360. Up to 299 conditions per place. [2023-08-24 14:30:28,163 INFO L140 encePairwiseOnDemand]: 179/188 looper letters, 101 selfloop transitions, 63 changer transitions 0/164 dead transitions. [2023-08-24 14:30:28,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 164 transitions, 1652 flow [2023-08-24 14:30:28,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 14:30:28,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 14:30:28,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 850 transitions. [2023-08-24 14:30:28,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023640661938534 [2023-08-24 14:30:28,166 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 850 transitions. [2023-08-24 14:30:28,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 850 transitions. [2023-08-24 14:30:28,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:30:28,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 850 transitions. [2023-08-24 14:30:28,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 94.44444444444444) internal successors, (850), 9 states have internal predecessors, (850), 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) [2023-08-24 14:30:28,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 188.0) internal successors, (1880), 10 states have internal predecessors, (1880), 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) [2023-08-24 14:30:28,170 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 188.0) internal successors, (1880), 10 states have internal predecessors, (1880), 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) [2023-08-24 14:30:28,170 INFO L175 Difference]: Start difference. First operand has 55 places, 61 transitions, 531 flow. Second operand 9 states and 850 transitions. [2023-08-24 14:30:28,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 164 transitions, 1652 flow [2023-08-24 14:30:28,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 164 transitions, 1642 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-08-24 14:30:28,180 INFO L231 Difference]: Finished difference. Result has 71 places, 103 transitions, 1281 flow [2023-08-24 14:30:28,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1281, PETRI_PLACES=71, PETRI_TRANSITIONS=103} [2023-08-24 14:30:28,181 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 41 predicate places. [2023-08-24 14:30:28,181 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 103 transitions, 1281 flow [2023-08-24 14:30:28,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 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) [2023-08-24 14:30:28,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:30:28,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:30:28,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 14:30:28,182 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:30:28,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:30:28,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1087150805, now seen corresponding path program 3 times [2023-08-24 14:30:28,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:30:28,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369741458] [2023-08-24 14:30:28,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:30:28,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:30:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:30:28,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:28,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:30:28,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369741458] [2023-08-24 14:30:28,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369741458] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:30:28,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:30:28,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 14:30:28,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484695831] [2023-08-24 14:30:28,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:30:28,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 14:30:28,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:30:28,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 14:30:28,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 14:30:28,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 188 [2023-08-24 14:30:28,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 103 transitions, 1281 flow. Second operand has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 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) [2023-08-24 14:30:28,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:30:28,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 188 [2023-08-24 14:30:28,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:30:28,496 INFO L124 PetriNetUnfolderBase]: 553/944 cut-off events. [2023-08-24 14:30:28,496 INFO L125 PetriNetUnfolderBase]: For 10424/10424 co-relation queries the response was YES. [2023-08-24 14:30:28,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6176 conditions, 944 events. 553/944 cut-off events. For 10424/10424 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3956 event pairs, 4 based on Foata normal form. 36/980 useless extension candidates. Maximal degree in co-relation 5161. Up to 458 conditions per place. [2023-08-24 14:30:28,502 INFO L140 encePairwiseOnDemand]: 179/188 looper letters, 100 selfloop transitions, 42 changer transitions 40/182 dead transitions. [2023-08-24 14:30:28,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 182 transitions, 2517 flow [2023-08-24 14:30:28,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 14:30:28,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 14:30:28,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 826 transitions. [2023-08-24 14:30:28,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48817966903073284 [2023-08-24 14:30:28,504 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 826 transitions. [2023-08-24 14:30:28,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 826 transitions. [2023-08-24 14:30:28,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:30:28,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 826 transitions. [2023-08-24 14:30:28,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 91.77777777777777) internal successors, (826), 9 states have internal predecessors, (826), 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) [2023-08-24 14:30:28,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 188.0) internal successors, (1880), 10 states have internal predecessors, (1880), 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) [2023-08-24 14:30:28,508 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 188.0) internal successors, (1880), 10 states have internal predecessors, (1880), 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) [2023-08-24 14:30:28,508 INFO L175 Difference]: Start difference. First operand has 71 places, 103 transitions, 1281 flow. Second operand 9 states and 826 transitions. [2023-08-24 14:30:28,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 182 transitions, 2517 flow [2023-08-24 14:30:28,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 182 transitions, 2377 flow, removed 70 selfloop flow, removed 0 redundant places. [2023-08-24 14:30:28,528 INFO L231 Difference]: Finished difference. Result has 85 places, 107 transitions, 1453 flow [2023-08-24 14:30:28,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1453, PETRI_PLACES=85, PETRI_TRANSITIONS=107} [2023-08-24 14:30:28,528 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 55 predicate places. [2023-08-24 14:30:28,529 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 107 transitions, 1453 flow [2023-08-24 14:30:28,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 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) [2023-08-24 14:30:28,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:30:28,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:30:28,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 14:30:28,529 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:30:28,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:30:28,530 INFO L85 PathProgramCache]: Analyzing trace with hash 297645157, now seen corresponding path program 4 times [2023-08-24 14:30:28,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:30:28,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734271317] [2023-08-24 14:30:28,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:30:28,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:30:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:30:28,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:28,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:30:28,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734271317] [2023-08-24 14:30:28,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734271317] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:30:28,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:30:28,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 14:30:28,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555780005] [2023-08-24 14:30:28,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:30:28,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 14:30:28,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:30:28,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 14:30:28,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-24 14:30:28,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 188 [2023-08-24 14:30:28,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 107 transitions, 1453 flow. Second operand has 6 states, 6 states have (on average 84.33333333333333) internal successors, (506), 6 states have internal predecessors, (506), 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) [2023-08-24 14:30:28,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:30:28,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 188 [2023-08-24 14:30:28,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:30:28,886 INFO L124 PetriNetUnfolderBase]: 634/1123 cut-off events. [2023-08-24 14:30:28,886 INFO L125 PetriNetUnfolderBase]: For 14486/14486 co-relation queries the response was YES. [2023-08-24 14:30:28,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7631 conditions, 1123 events. 634/1123 cut-off events. For 14486/14486 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5278 event pairs, 28 based on Foata normal form. 32/1155 useless extension candidates. Maximal degree in co-relation 6152. Up to 660 conditions per place. [2023-08-24 14:30:28,893 INFO L140 encePairwiseOnDemand]: 181/188 looper letters, 116 selfloop transitions, 15 changer transitions 95/226 dead transitions. [2023-08-24 14:30:28,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 226 transitions, 3454 flow [2023-08-24 14:30:28,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 14:30:28,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 14:30:28,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 723 transitions. [2023-08-24 14:30:28,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.480718085106383 [2023-08-24 14:30:28,895 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 723 transitions. [2023-08-24 14:30:28,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 723 transitions. [2023-08-24 14:30:28,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:30:28,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 723 transitions. [2023-08-24 14:30:28,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 90.375) internal successors, (723), 8 states have internal predecessors, (723), 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) [2023-08-24 14:30:28,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 188.0) internal successors, (1692), 9 states have internal predecessors, (1692), 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) [2023-08-24 14:30:28,898 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 188.0) internal successors, (1692), 9 states have internal predecessors, (1692), 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) [2023-08-24 14:30:28,898 INFO L175 Difference]: Start difference. First operand has 85 places, 107 transitions, 1453 flow. Second operand 8 states and 723 transitions. [2023-08-24 14:30:28,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 226 transitions, 3454 flow [2023-08-24 14:30:28,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 226 transitions, 3310 flow, removed 41 selfloop flow, removed 5 redundant places. [2023-08-24 14:30:28,922 INFO L231 Difference]: Finished difference. Result has 92 places, 115 transitions, 1633 flow [2023-08-24 14:30:28,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1633, PETRI_PLACES=92, PETRI_TRANSITIONS=115} [2023-08-24 14:30:28,923 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 62 predicate places. [2023-08-24 14:30:28,923 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 115 transitions, 1633 flow [2023-08-24 14:30:28,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 84.33333333333333) internal successors, (506), 6 states have internal predecessors, (506), 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) [2023-08-24 14:30:28,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:30:28,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:30:28,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 14:30:28,923 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:30:28,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:30:28,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1132828558, now seen corresponding path program 1 times [2023-08-24 14:30:28,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:30:28,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568725244] [2023-08-24 14:30:28,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:30:28,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:30:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:30:29,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:29,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:30:29,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568725244] [2023-08-24 14:30:29,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568725244] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:30:29,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615454928] [2023-08-24 14:30:29,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:30:29,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:30:29,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:30:29,047 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) [2023-08-24 14:30:29,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 14:30:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:30:29,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-24 14:30:29,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:30:29,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:29,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:30:29,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:29,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615454928] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:30:29,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:30:29,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-24 14:30:29,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698044142] [2023-08-24 14:30:29,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:30:29,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 14:30:29,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:30:29,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 14:30:29,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-08-24 14:30:29,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 188 [2023-08-24 14:30:29,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 115 transitions, 1633 flow. Second operand has 13 states, 13 states have (on average 84.53846153846153) internal successors, (1099), 13 states have internal predecessors, (1099), 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) [2023-08-24 14:30:29,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:30:29,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 188 [2023-08-24 14:30:29,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:30:29,798 INFO L124 PetriNetUnfolderBase]: 878/1523 cut-off events. [2023-08-24 14:30:29,798 INFO L125 PetriNetUnfolderBase]: For 20810/20810 co-relation queries the response was YES. [2023-08-24 14:30:29,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10865 conditions, 1523 events. 878/1523 cut-off events. For 20810/20810 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7442 event pairs, 15 based on Foata normal form. 52/1575 useless extension candidates. Maximal degree in co-relation 10203. Up to 461 conditions per place. [2023-08-24 14:30:29,809 INFO L140 encePairwiseOnDemand]: 181/188 looper letters, 130 selfloop transitions, 58 changer transitions 154/342 dead transitions. [2023-08-24 14:30:29,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 342 transitions, 5261 flow [2023-08-24 14:30:29,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 14:30:29,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 14:30:29,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1519 transitions. [2023-08-24 14:30:29,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47528160200250313 [2023-08-24 14:30:29,812 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1519 transitions. [2023-08-24 14:30:29,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1519 transitions. [2023-08-24 14:30:29,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:30:29,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1519 transitions. [2023-08-24 14:30:29,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 89.3529411764706) internal successors, (1519), 17 states have internal predecessors, (1519), 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) [2023-08-24 14:30:29,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 188.0) internal successors, (3384), 18 states have internal predecessors, (3384), 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) [2023-08-24 14:30:29,818 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 188.0) internal successors, (3384), 18 states have internal predecessors, (3384), 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) [2023-08-24 14:30:29,818 INFO L175 Difference]: Start difference. First operand has 92 places, 115 transitions, 1633 flow. Second operand 17 states and 1519 transitions. [2023-08-24 14:30:29,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 342 transitions, 5261 flow [2023-08-24 14:30:29,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 342 transitions, 4929 flow, removed 106 selfloop flow, removed 6 redundant places. [2023-08-24 14:30:29,859 INFO L231 Difference]: Finished difference. Result has 105 places, 133 transitions, 2024 flow [2023-08-24 14:30:29,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2024, PETRI_PLACES=105, PETRI_TRANSITIONS=133} [2023-08-24 14:30:29,859 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 75 predicate places. [2023-08-24 14:30:29,859 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 133 transitions, 2024 flow [2023-08-24 14:30:29,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 84.53846153846153) internal successors, (1099), 13 states have internal predecessors, (1099), 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) [2023-08-24 14:30:29,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:30:29,860 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:30:29,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 14:30:30,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-24 14:30:30,068 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:30:30,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:30:30,068 INFO L85 PathProgramCache]: Analyzing trace with hash 431220275, now seen corresponding path program 5 times [2023-08-24 14:30:30,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:30:30,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841738405] [2023-08-24 14:30:30,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:30:30,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:30:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:30:30,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:30,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:30:30,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841738405] [2023-08-24 14:30:30,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841738405] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:30:30,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685003010] [2023-08-24 14:30:30,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 14:30:30,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:30:30,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:30:30,232 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) [2023-08-24 14:30:30,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 14:30:30,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 14:30:30,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:30:30,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 14:30:30,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:30:30,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:30,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:30:30,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:30,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685003010] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:30:30,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:30:30,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-24 14:30:30,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213254169] [2023-08-24 14:30:30,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:30:30,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 14:30:30,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:30:30,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 14:30:30,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-08-24 14:30:30,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 188 [2023-08-24 14:30:30,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 133 transitions, 2024 flow. Second operand has 14 states, 14 states have (on average 84.14285714285714) internal successors, (1178), 14 states have internal predecessors, (1178), 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) [2023-08-24 14:30:30,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:30:30,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 188 [2023-08-24 14:30:30,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:30:31,678 INFO L124 PetriNetUnfolderBase]: 1744/3011 cut-off events. [2023-08-24 14:30:31,678 INFO L125 PetriNetUnfolderBase]: For 56955/56955 co-relation queries the response was YES. [2023-08-24 14:30:31,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23006 conditions, 3011 events. 1744/3011 cut-off events. For 56955/56955 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 16663 event pairs, 17 based on Foata normal form. 80/3091 useless extension candidates. Maximal degree in co-relation 21433. Up to 981 conditions per place. [2023-08-24 14:30:31,709 INFO L140 encePairwiseOnDemand]: 181/188 looper letters, 220 selfloop transitions, 152 changer transitions 269/641 dead transitions. [2023-08-24 14:30:31,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 641 transitions, 10435 flow [2023-08-24 14:30:31,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-24 14:30:31,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-24 14:30:31,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3117 transitions. [2023-08-24 14:30:31,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4737082066869301 [2023-08-24 14:30:31,716 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3117 transitions. [2023-08-24 14:30:31,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3117 transitions. [2023-08-24 14:30:31,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:30:31,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3117 transitions. [2023-08-24 14:30:31,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 89.05714285714286) internal successors, (3117), 35 states have internal predecessors, (3117), 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) [2023-08-24 14:30:31,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 188.0) internal successors, (6768), 36 states have internal predecessors, (6768), 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) [2023-08-24 14:30:31,731 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 188.0) internal successors, (6768), 36 states have internal predecessors, (6768), 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) [2023-08-24 14:30:31,731 INFO L175 Difference]: Start difference. First operand has 105 places, 133 transitions, 2024 flow. Second operand 35 states and 3117 transitions. [2023-08-24 14:30:31,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 641 transitions, 10435 flow [2023-08-24 14:30:31,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 641 transitions, 9429 flow, removed 351 selfloop flow, removed 11 redundant places. [2023-08-24 14:30:31,960 INFO L231 Difference]: Finished difference. Result has 137 places, 237 transitions, 4102 flow [2023-08-24 14:30:31,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=1709, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=4102, PETRI_PLACES=137, PETRI_TRANSITIONS=237} [2023-08-24 14:30:31,961 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 107 predicate places. [2023-08-24 14:30:31,961 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 237 transitions, 4102 flow [2023-08-24 14:30:31,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 84.14285714285714) internal successors, (1178), 14 states have internal predecessors, (1178), 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) [2023-08-24 14:30:31,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:30:31,962 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:30:31,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-24 14:30:32,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-24 14:30:32,188 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:30:32,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:30:32,189 INFO L85 PathProgramCache]: Analyzing trace with hash 217822774, now seen corresponding path program 1 times [2023-08-24 14:30:32,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:30:32,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763860036] [2023-08-24 14:30:32,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:30:32,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:30:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:30:32,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:32,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:30:32,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763860036] [2023-08-24 14:30:32,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763860036] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:30:32,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649821325] [2023-08-24 14:30:32,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:30:32,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:30:32,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:30:32,450 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) [2023-08-24 14:30:32,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 14:30:32,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:30:32,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 14:30:32,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:30:32,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:32,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:30:33,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:33,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649821325] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:30:33,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:30:33,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-24 14:30:33,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547996359] [2023-08-24 14:30:33,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:30:33,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 14:30:33,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:30:33,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 14:30:33,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-08-24 14:30:33,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-08-24 14:30:33,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 237 transitions, 4102 flow. Second operand has 19 states, 19 states have (on average 81.94736842105263) internal successors, (1557), 19 states have internal predecessors, (1557), 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) [2023-08-24 14:30:33,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:30:33,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-08-24 14:30:33,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:30:34,663 INFO L124 PetriNetUnfolderBase]: 2044/3463 cut-off events. [2023-08-24 14:30:34,663 INFO L125 PetriNetUnfolderBase]: For 63960/63960 co-relation queries the response was YES. [2023-08-24 14:30:34,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26464 conditions, 3463 events. 2044/3463 cut-off events. For 63960/63960 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 19348 event pairs, 25 based on Foata normal form. 92/3555 useless extension candidates. Maximal degree in co-relation 26198. Up to 1199 conditions per place. [2023-08-24 14:30:34,689 INFO L140 encePairwiseOnDemand]: 181/188 looper letters, 261 selfloop transitions, 201 changer transitions 246/708 dead transitions. [2023-08-24 14:30:34,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 708 transitions, 11525 flow [2023-08-24 14:30:34,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-24 14:30:34,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-24 14:30:34,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3393 transitions. [2023-08-24 14:30:34,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627659574468085 [2023-08-24 14:30:34,693 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3393 transitions. [2023-08-24 14:30:34,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3393 transitions. [2023-08-24 14:30:34,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:30:34,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3393 transitions. [2023-08-24 14:30:34,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 87.0) internal successors, (3393), 39 states have internal predecessors, (3393), 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) [2023-08-24 14:30:34,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 188.0) internal successors, (7520), 40 states have internal predecessors, (7520), 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) [2023-08-24 14:30:34,706 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 188.0) internal successors, (7520), 40 states have internal predecessors, (7520), 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) [2023-08-24 14:30:34,706 INFO L175 Difference]: Start difference. First operand has 137 places, 237 transitions, 4102 flow. Second operand 39 states and 3393 transitions. [2023-08-24 14:30:34,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 708 transitions, 11525 flow [2023-08-24 14:30:34,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 708 transitions, 9676 flow, removed 902 selfloop flow, removed 20 redundant places. [2023-08-24 14:30:34,900 INFO L231 Difference]: Finished difference. Result has 151 places, 280 transitions, 4322 flow [2023-08-24 14:30:34,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=3117, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=4322, PETRI_PLACES=151, PETRI_TRANSITIONS=280} [2023-08-24 14:30:34,900 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 121 predicate places. [2023-08-24 14:30:34,900 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 280 transitions, 4322 flow [2023-08-24 14:30:34,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 81.94736842105263) internal successors, (1557), 19 states have internal predecessors, (1557), 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) [2023-08-24 14:30:34,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:30:34,913 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:30:34,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 14:30:35,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:30:35,118 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:30:35,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:30:35,118 INFO L85 PathProgramCache]: Analyzing trace with hash 428695786, now seen corresponding path program 2 times [2023-08-24 14:30:35,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:30:35,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116831802] [2023-08-24 14:30:35,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:30:35,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:30:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:30:35,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:35,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:30:35,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116831802] [2023-08-24 14:30:35,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116831802] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:30:35,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647577154] [2023-08-24 14:30:35,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 14:30:35,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:30:35,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:30:35,344 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) [2023-08-24 14:30:35,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 14:30:35,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 14:30:35,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:30:35,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 14:30:35,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:30:35,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:35,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:30:35,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:35,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647577154] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:30:35,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:30:35,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-24 14:30:35,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650823480] [2023-08-24 14:30:35,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:30:35,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 14:30:35,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:30:35,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 14:30:35,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-08-24 14:30:35,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 188 [2023-08-24 14:30:35,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 280 transitions, 4322 flow. Second operand has 19 states, 19 states have (on average 80.36842105263158) internal successors, (1527), 19 states have internal predecessors, (1527), 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) [2023-08-24 14:30:35,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:30:35,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 188 [2023-08-24 14:30:35,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:30:37,980 INFO L124 PetriNetUnfolderBase]: 2937/4882 cut-off events. [2023-08-24 14:30:37,981 INFO L125 PetriNetUnfolderBase]: For 65134/65134 co-relation queries the response was YES. [2023-08-24 14:30:38,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35512 conditions, 4882 events. 2937/4882 cut-off events. For 65134/65134 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 27716 event pairs, 35 based on Foata normal form. 228/5110 useless extension candidates. Maximal degree in co-relation 34834. Up to 1785 conditions per place. [2023-08-24 14:30:38,018 INFO L140 encePairwiseOnDemand]: 179/188 looper letters, 292 selfloop transitions, 260 changer transitions 304/856 dead transitions. [2023-08-24 14:30:38,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 856 transitions, 14574 flow [2023-08-24 14:30:38,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-24 14:30:38,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-24 14:30:38,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 4260 transitions. [2023-08-24 14:30:38,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44430538172715894 [2023-08-24 14:30:38,038 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 4260 transitions. [2023-08-24 14:30:38,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 4260 transitions. [2023-08-24 14:30:38,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:30:38,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 4260 transitions. [2023-08-24 14:30:38,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 83.52941176470588) internal successors, (4260), 51 states have internal predecessors, (4260), 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) [2023-08-24 14:30:38,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 188.0) internal successors, (9776), 52 states have internal predecessors, (9776), 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) [2023-08-24 14:30:38,050 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 188.0) internal successors, (9776), 52 states have internal predecessors, (9776), 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) [2023-08-24 14:30:38,050 INFO L175 Difference]: Start difference. First operand has 151 places, 280 transitions, 4322 flow. Second operand 51 states and 4260 transitions. [2023-08-24 14:30:38,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 856 transitions, 14574 flow [2023-08-24 14:30:38,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 856 transitions, 13348 flow, removed 510 selfloop flow, removed 23 redundant places. [2023-08-24 14:30:38,425 INFO L231 Difference]: Finished difference. Result has 195 places, 393 transitions, 6820 flow [2023-08-24 14:30:38,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=3864, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=6820, PETRI_PLACES=195, PETRI_TRANSITIONS=393} [2023-08-24 14:30:38,426 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 165 predicate places. [2023-08-24 14:30:38,426 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 393 transitions, 6820 flow [2023-08-24 14:30:38,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 80.36842105263158) internal successors, (1527), 19 states have internal predecessors, (1527), 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) [2023-08-24 14:30:38,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:30:38,427 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:30:38,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 14:30:38,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:30:38,631 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:30:38,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:30:38,632 INFO L85 PathProgramCache]: Analyzing trace with hash 364047418, now seen corresponding path program 2 times [2023-08-24 14:30:38,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:30:38,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20283008] [2023-08-24 14:30:38,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:30:38,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:30:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:30:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:38,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:30:38,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20283008] [2023-08-24 14:30:38,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20283008] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:30:38,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381725002] [2023-08-24 14:30:38,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 14:30:38,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:30:38,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:30:38,914 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) [2023-08-24 14:30:38,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 14:30:38,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 14:30:38,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:30:38,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 14:30:38,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:30:39,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:39,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:30:39,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:39,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381725002] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:30:39,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:30:39,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-24 14:30:39,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729063655] [2023-08-24 14:30:39,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:30:39,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 14:30:39,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:30:39,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 14:30:39,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-08-24 14:30:39,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-08-24 14:30:39,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 393 transitions, 6820 flow. Second operand has 18 states, 18 states have (on average 82.11111111111111) internal successors, (1478), 18 states have internal predecessors, (1478), 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) [2023-08-24 14:30:39,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:30:39,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-08-24 14:30:39,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:30:41,815 INFO L124 PetriNetUnfolderBase]: 3449/5714 cut-off events. [2023-08-24 14:30:41,815 INFO L125 PetriNetUnfolderBase]: For 115151/115151 co-relation queries the response was YES. [2023-08-24 14:30:41,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45201 conditions, 5714 events. 3449/5714 cut-off events. For 115151/115151 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 33054 event pairs, 55 based on Foata normal form. 168/5882 useless extension candidates. Maximal degree in co-relation 43653. Up to 2125 conditions per place. [2023-08-24 14:30:41,859 INFO L140 encePairwiseOnDemand]: 178/188 looper letters, 401 selfloop transitions, 237 changer transitions 262/900 dead transitions. [2023-08-24 14:30:41,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 900 transitions, 17106 flow [2023-08-24 14:30:41,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-24 14:30:41,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-24 14:30:41,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4196 transitions. [2023-08-24 14:30:41,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45549283543204516 [2023-08-24 14:30:41,863 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4196 transitions. [2023-08-24 14:30:41,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4196 transitions. [2023-08-24 14:30:41,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:30:41,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4196 transitions. [2023-08-24 14:30:41,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 85.63265306122449) internal successors, (4196), 49 states have internal predecessors, (4196), 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) [2023-08-24 14:30:41,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 188.0) internal successors, (9400), 50 states have internal predecessors, (9400), 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) [2023-08-24 14:30:41,874 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 188.0) internal successors, (9400), 50 states have internal predecessors, (9400), 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) [2023-08-24 14:30:41,874 INFO L175 Difference]: Start difference. First operand has 195 places, 393 transitions, 6820 flow. Second operand 49 states and 4196 transitions. [2023-08-24 14:30:41,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 900 transitions, 17106 flow [2023-08-24 14:30:42,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 900 transitions, 15573 flow, removed 748 selfloop flow, removed 27 redundant places. [2023-08-24 14:30:42,313 INFO L231 Difference]: Finished difference. Result has 217 places, 492 transitions, 8865 flow [2023-08-24 14:30:42,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=6085, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=8865, PETRI_PLACES=217, PETRI_TRANSITIONS=492} [2023-08-24 14:30:42,314 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 187 predicate places. [2023-08-24 14:30:42,314 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 492 transitions, 8865 flow [2023-08-24 14:30:42,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 82.11111111111111) internal successors, (1478), 18 states have internal predecessors, (1478), 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) [2023-08-24 14:30:42,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:30:42,315 INFO L208 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] [2023-08-24 14:30:42,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-24 14:30:42,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-24 14:30:42,519 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:30:42,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:30:42,519 INFO L85 PathProgramCache]: Analyzing trace with hash -262985897, now seen corresponding path program 3 times [2023-08-24 14:30:42,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:30:42,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434642910] [2023-08-24 14:30:42,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:30:42,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:30:42,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:30:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:42,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:30:42,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434642910] [2023-08-24 14:30:42,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434642910] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:30:42,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742377544] [2023-08-24 14:30:42,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 14:30:42,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:30:42,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:30:42,782 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 14:30:42,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-24 14:30:42,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-24 14:30:42,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:30:42,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 14:30:42,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:30:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:43,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:30:43,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:43,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742377544] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:30:43,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:30:43,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-24 14:30:43,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606872243] [2023-08-24 14:30:43,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:30:43,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 14:30:43,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:30:43,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 14:30:43,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2023-08-24 14:30:43,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 188 [2023-08-24 14:30:43,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 492 transitions, 8865 flow. Second operand has 21 states, 21 states have (on average 80.14285714285714) internal successors, (1683), 21 states have internal predecessors, (1683), 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) [2023-08-24 14:30:43,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:30:43,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 188 [2023-08-24 14:30:43,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:30:47,960 INFO L124 PetriNetUnfolderBase]: 4709/7820 cut-off events. [2023-08-24 14:30:47,960 INFO L125 PetriNetUnfolderBase]: For 202288/202288 co-relation queries the response was YES. [2023-08-24 14:30:48,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65319 conditions, 7820 events. 4709/7820 cut-off events. For 202288/202288 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 48068 event pairs, 85 based on Foata normal form. 238/8058 useless extension candidates. Maximal degree in co-relation 63306. Up to 2769 conditions per place. [2023-08-24 14:30:48,029 INFO L140 encePairwiseOnDemand]: 179/188 looper letters, 552 selfloop transitions, 378 changer transitions 317/1247 dead transitions. [2023-08-24 14:30:48,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 1247 transitions, 25047 flow [2023-08-24 14:30:48,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-08-24 14:30:48,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-08-24 14:30:48,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 5686 transitions. [2023-08-24 14:30:48,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4447747183979975 [2023-08-24 14:30:48,039 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 5686 transitions. [2023-08-24 14:30:48,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 5686 transitions. [2023-08-24 14:30:48,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:30:48,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 5686 transitions. [2023-08-24 14:30:48,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 83.61764705882354) internal successors, (5686), 68 states have internal predecessors, (5686), 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) [2023-08-24 14:30:48,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 188.0) internal successors, (12972), 69 states have internal predecessors, (12972), 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) [2023-08-24 14:30:48,063 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 188.0) internal successors, (12972), 69 states have internal predecessors, (12972), 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) [2023-08-24 14:30:48,063 INFO L175 Difference]: Start difference. First operand has 217 places, 492 transitions, 8865 flow. Second operand 68 states and 5686 transitions. [2023-08-24 14:30:48,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 1247 transitions, 25047 flow [2023-08-24 14:30:48,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 1247 transitions, 22460 flow, removed 1263 selfloop flow, removed 33 redundant places. [2023-08-24 14:30:48,930 INFO L231 Difference]: Finished difference. Result has 261 places, 666 transitions, 12643 flow [2023-08-24 14:30:48,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=7862, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=12643, PETRI_PLACES=261, PETRI_TRANSITIONS=666} [2023-08-24 14:30:48,930 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 231 predicate places. [2023-08-24 14:30:48,930 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 666 transitions, 12643 flow [2023-08-24 14:30:48,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 80.14285714285714) internal successors, (1683), 21 states have internal predecessors, (1683), 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) [2023-08-24 14:30:48,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:30:48,931 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:30:48,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-24 14:30:49,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-24 14:30:49,136 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:30:49,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:30:49,136 INFO L85 PathProgramCache]: Analyzing trace with hash 294394637, now seen corresponding path program 6 times [2023-08-24 14:30:49,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:30:49,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835831016] [2023-08-24 14:30:49,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:30:49,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:30:49,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:30:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:49,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:30:49,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835831016] [2023-08-24 14:30:49,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835831016] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:30:49,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941687368] [2023-08-24 14:30:49,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 14:30:49,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:30:49,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:30:49,669 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 14:30:49,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-24 14:30:49,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-08-24 14:30:49,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:30:49,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-24 14:30:49,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:30:50,061 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:50,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:30:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:50,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941687368] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:30:50,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:30:50,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-24 14:30:50,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606720660] [2023-08-24 14:30:50,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:30:50,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 14:30:50,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:30:50,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 14:30:50,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2023-08-24 14:30:50,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-08-24 14:30:50,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 666 transitions, 12643 flow. Second operand has 24 states, 24 states have (on average 81.66666666666667) internal successors, (1960), 24 states have internal predecessors, (1960), 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) [2023-08-24 14:30:50,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:30:50,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-08-24 14:30:50,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:30:55,847 INFO L124 PetriNetUnfolderBase]: 6533/10956 cut-off events. [2023-08-24 14:30:55,848 INFO L125 PetriNetUnfolderBase]: For 362833/362833 co-relation queries the response was YES. [2023-08-24 14:30:55,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95886 conditions, 10956 events. 6533/10956 cut-off events. For 362833/362833 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 72313 event pairs, 135 based on Foata normal form. 318/11274 useless extension candidates. Maximal degree in co-relation 93233. Up to 4021 conditions per place. [2023-08-24 14:30:55,992 INFO L140 encePairwiseOnDemand]: 178/188 looper letters, 657 selfloop transitions, 505 changer transitions 459/1621 dead transitions. [2023-08-24 14:30:55,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 1621 transitions, 34945 flow [2023-08-24 14:30:56,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-08-24 14:30:56,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-08-24 14:30:56,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 6424 transitions. [2023-08-24 14:30:56,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45560283687943265 [2023-08-24 14:30:56,004 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 6424 transitions. [2023-08-24 14:30:56,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 6424 transitions. [2023-08-24 14:30:56,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:30:56,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 6424 transitions. [2023-08-24 14:30:56,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 85.65333333333334) internal successors, (6424), 75 states have internal predecessors, (6424), 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) [2023-08-24 14:30:56,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 188.0) internal successors, (14288), 76 states have internal predecessors, (14288), 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) [2023-08-24 14:30:56,036 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 188.0) internal successors, (14288), 76 states have internal predecessors, (14288), 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) [2023-08-24 14:30:56,037 INFO L175 Difference]: Start difference. First operand has 261 places, 666 transitions, 12643 flow. Second operand 75 states and 6424 transitions. [2023-08-24 14:30:56,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 1621 transitions, 34945 flow [2023-08-24 14:30:58,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 1621 transitions, 30895 flow, removed 1714 selfloop flow, removed 38 redundant places. [2023-08-24 14:30:58,045 INFO L231 Difference]: Finished difference. Result has 310 places, 925 transitions, 18004 flow [2023-08-24 14:30:58,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=11216, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=18004, PETRI_PLACES=310, PETRI_TRANSITIONS=925} [2023-08-24 14:30:58,046 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 280 predicate places. [2023-08-24 14:30:58,046 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 925 transitions, 18004 flow [2023-08-24 14:30:58,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 81.66666666666667) internal successors, (1960), 24 states have internal predecessors, (1960), 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) [2023-08-24 14:30:58,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:30:58,046 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:30:58,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-24 14:30:58,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:30:58,253 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:30:58,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:30:58,253 INFO L85 PathProgramCache]: Analyzing trace with hash 909572713, now seen corresponding path program 4 times [2023-08-24 14:30:58,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:30:58,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338608535] [2023-08-24 14:30:58,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:30:58,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:30:58,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:30:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:58,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:30:58,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338608535] [2023-08-24 14:30:58,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338608535] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:30:58,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845416347] [2023-08-24 14:30:58,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 14:30:58,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:30:58,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:30:58,758 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 14:30:58,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-24 14:30:58,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 14:30:58,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:30:58,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-24 14:30:58,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:30:59,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:30:59,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:31:00,064 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:31:00,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845416347] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:31:00,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:31:00,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-24 14:31:00,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211857451] [2023-08-24 14:31:00,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:31:00,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 14:31:00,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:31:00,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 14:31:00,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2023-08-24 14:31:00,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-08-24 14:31:00,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 925 transitions, 18004 flow. Second operand has 25 states, 25 states have (on average 81.72) internal successors, (2043), 25 states have internal predecessors, (2043), 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) [2023-08-24 14:31:00,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:31:00,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-08-24 14:31:00,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:31:07,425 INFO L124 PetriNetUnfolderBase]: 8790/14851 cut-off events. [2023-08-24 14:31:07,426 INFO L125 PetriNetUnfolderBase]: For 619882/619882 co-relation queries the response was YES. [2023-08-24 14:31:07,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134251 conditions, 14851 events. 8790/14851 cut-off events. For 619882/619882 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 105208 event pairs, 131 based on Foata normal form. 260/15111 useless extension candidates. Maximal degree in co-relation 134090. Up to 5283 conditions per place. [2023-08-24 14:31:07,591 INFO L140 encePairwiseOnDemand]: 181/188 looper letters, 829 selfloop transitions, 786 changer transitions 571/2186 dead transitions. [2023-08-24 14:31:07,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 2186 transitions, 47169 flow [2023-08-24 14:31:07,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-08-24 14:31:07,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2023-08-24 14:31:07,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 6096 transitions. [2023-08-24 14:31:07,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46322188449848023 [2023-08-24 14:31:07,596 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 6096 transitions. [2023-08-24 14:31:07,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 6096 transitions. [2023-08-24 14:31:07,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:31:07,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 6096 transitions. [2023-08-24 14:31:07,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 87.08571428571429) internal successors, (6096), 70 states have internal predecessors, (6096), 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) [2023-08-24 14:31:07,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 188.0) internal successors, (13348), 71 states have internal predecessors, (13348), 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) [2023-08-24 14:31:07,610 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 188.0) internal successors, (13348), 71 states have internal predecessors, (13348), 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) [2023-08-24 14:31:07,610 INFO L175 Difference]: Start difference. First operand has 310 places, 925 transitions, 18004 flow. Second operand 70 states and 6096 transitions. [2023-08-24 14:31:07,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 2186 transitions, 47169 flow [2023-08-24 14:31:11,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 2186 transitions, 41040 flow, removed 3024 selfloop flow, removed 55 redundant places. [2023-08-24 14:31:11,827 INFO L231 Difference]: Finished difference. Result has 300 places, 1231 transitions, 25126 flow [2023-08-24 14:31:11,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=16243, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=925, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=470, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=25126, PETRI_PLACES=300, PETRI_TRANSITIONS=1231} [2023-08-24 14:31:11,828 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 270 predicate places. [2023-08-24 14:31:11,828 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 1231 transitions, 25126 flow [2023-08-24 14:31:11,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 81.72) internal successors, (2043), 25 states have internal predecessors, (2043), 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) [2023-08-24 14:31:11,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:31:11,829 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:31:11,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-24 14:31:12,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-24 14:31:12,035 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:31:12,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:31:12,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1511473646, now seen corresponding path program 5 times [2023-08-24 14:31:12,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:31:12,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112287795] [2023-08-24 14:31:12,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:31:12,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:31:12,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:31:12,408 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:31:12,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:31:12,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112287795] [2023-08-24 14:31:12,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112287795] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:31:12,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949799201] [2023-08-24 14:31:12,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 14:31:12,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:31:12,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:31:12,409 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 14:31:12,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-24 14:31:12,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-24 14:31:12,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:31:12,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-24 14:31:12,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:31:12,747 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:31:12,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:31:13,517 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:31:13,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949799201] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:31:13,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:31:13,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-24 14:31:13,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619084980] [2023-08-24 14:31:13,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:31:13,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 14:31:13,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:31:13,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 14:31:13,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2023-08-24 14:31:13,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-08-24 14:31:13,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 1231 transitions, 25126 flow. Second operand has 25 states, 25 states have (on average 81.8) internal successors, (2045), 25 states have internal predecessors, (2045), 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) [2023-08-24 14:31:13,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:31:13,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-08-24 14:31:13,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:31:21,279 INFO L124 PetriNetUnfolderBase]: 11456/19309 cut-off events. [2023-08-24 14:31:21,279 INFO L125 PetriNetUnfolderBase]: For 549023/549023 co-relation queries the response was YES. [2023-08-24 14:31:21,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162847 conditions, 19309 events. 11456/19309 cut-off events. For 549023/549023 co-relation queries the response was YES. Maximal size of possible extension queue 743. Compared 141068 event pairs, 147 based on Foata normal form. 418/19727 useless extension candidates. Maximal degree in co-relation 162230. Up to 6869 conditions per place. [2023-08-24 14:31:21,461 INFO L140 encePairwiseOnDemand]: 181/188 looper letters, 858 selfloop transitions, 935 changer transitions 959/2752 dead transitions. [2023-08-24 14:31:21,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 2752 transitions, 58059 flow [2023-08-24 14:31:21,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-08-24 14:31:21,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-08-24 14:31:21,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 6609 transitions. [2023-08-24 14:31:21,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46255599104143336 [2023-08-24 14:31:21,466 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 6609 transitions. [2023-08-24 14:31:21,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 6609 transitions. [2023-08-24 14:31:21,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:31:21,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 6609 transitions. [2023-08-24 14:31:21,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 86.96052631578948) internal successors, (6609), 76 states have internal predecessors, (6609), 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) [2023-08-24 14:31:21,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 188.0) internal successors, (14476), 77 states have internal predecessors, (14476), 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) [2023-08-24 14:31:21,479 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 188.0) internal successors, (14476), 77 states have internal predecessors, (14476), 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) [2023-08-24 14:31:21,479 INFO L175 Difference]: Start difference. First operand has 300 places, 1231 transitions, 25126 flow. Second operand 76 states and 6609 transitions. [2023-08-24 14:31:21,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 2752 transitions, 58059 flow [2023-08-24 14:31:26,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 2752 transitions, 52393 flow, removed 2189 selfloop flow, removed 40 redundant places. [2023-08-24 14:31:26,466 INFO L231 Difference]: Finished difference. Result has 339 places, 1421 transitions, 29704 flow [2023-08-24 14:31:26,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=22106, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=609, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=29704, PETRI_PLACES=339, PETRI_TRANSITIONS=1421} [2023-08-24 14:31:26,467 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 309 predicate places. [2023-08-24 14:31:26,467 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 1421 transitions, 29704 flow [2023-08-24 14:31:26,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 81.8) internal successors, (2045), 25 states have internal predecessors, (2045), 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) [2023-08-24 14:31:26,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:31:26,467 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:31:26,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-24 14:31:26,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-24 14:31:26,672 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:31:26,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:31:26,672 INFO L85 PathProgramCache]: Analyzing trace with hash -954193940, now seen corresponding path program 6 times [2023-08-24 14:31:26,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:31:26,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263385194] [2023-08-24 14:31:26,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:31:26,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:31:26,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:31:26,973 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:31:26,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:31:26,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263385194] [2023-08-24 14:31:26,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263385194] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:31:26,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811629081] [2023-08-24 14:31:26,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 14:31:26,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:31:26,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:31:26,974 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 14:31:26,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-24 14:31:27,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-24 14:31:27,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:31:27,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-24 14:31:27,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:31:27,293 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:31:27,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:31:28,180 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:31:28,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811629081] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:31:28,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:31:28,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-24 14:31:28,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090991218] [2023-08-24 14:31:28,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:31:28,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 14:31:28,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:31:28,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 14:31:28,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2023-08-24 14:31:28,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-08-24 14:31:28,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 1421 transitions, 29704 flow. Second operand has 25 states, 25 states have (on average 81.72) internal successors, (2043), 25 states have internal predecessors, (2043), 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) [2023-08-24 14:31:28,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:31:28,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-08-24 14:31:28,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:31:38,150 INFO L124 PetriNetUnfolderBase]: 13192/21843 cut-off events. [2023-08-24 14:31:38,150 INFO L125 PetriNetUnfolderBase]: For 522615/522615 co-relation queries the response was YES. [2023-08-24 14:31:38,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189438 conditions, 21843 events. 13192/21843 cut-off events. For 522615/522615 co-relation queries the response was YES. Maximal size of possible extension queue 894. Compared 159203 event pairs, 199 based on Foata normal form. 566/22409 useless extension candidates. Maximal degree in co-relation 189143. Up to 8033 conditions per place. [2023-08-24 14:31:38,655 INFO L140 encePairwiseOnDemand]: 181/188 looper letters, 1189 selfloop transitions, 899 changer transitions 737/2825 dead transitions. [2023-08-24 14:31:38,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 2825 transitions, 63593 flow [2023-08-24 14:31:38,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-08-24 14:31:38,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2023-08-24 14:31:38,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 6898 transitions. [2023-08-24 14:31:38,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4586436170212766 [2023-08-24 14:31:38,660 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 6898 transitions. [2023-08-24 14:31:38,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 6898 transitions. [2023-08-24 14:31:38,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:31:38,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 6898 transitions. [2023-08-24 14:31:38,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 86.225) internal successors, (6898), 80 states have internal predecessors, (6898), 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) [2023-08-24 14:31:38,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 188.0) internal successors, (15228), 81 states have internal predecessors, (15228), 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) [2023-08-24 14:31:38,676 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 188.0) internal successors, (15228), 81 states have internal predecessors, (15228), 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) [2023-08-24 14:31:38,676 INFO L175 Difference]: Start difference. First operand has 339 places, 1421 transitions, 29704 flow. Second operand 80 states and 6898 transitions. [2023-08-24 14:31:38,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 2825 transitions, 63593 flow [2023-08-24 14:31:44,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 2825 transitions, 59018 flow, removed 1968 selfloop flow, removed 41 redundant places. [2023-08-24 14:31:44,531 INFO L231 Difference]: Finished difference. Result has 367 places, 1709 transitions, 36444 flow [2023-08-24 14:31:44,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=26900, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=600, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=769, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=36444, PETRI_PLACES=367, PETRI_TRANSITIONS=1709} [2023-08-24 14:31:44,532 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 337 predicate places. [2023-08-24 14:31:44,532 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 1709 transitions, 36444 flow [2023-08-24 14:31:44,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 81.72) internal successors, (2043), 25 states have internal predecessors, (2043), 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) [2023-08-24 14:31:44,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:31:44,533 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:31:44,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-24 14:31:44,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:31:44,738 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:31:44,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:31:44,739 INFO L85 PathProgramCache]: Analyzing trace with hash 619708313, now seen corresponding path program 7 times [2023-08-24 14:31:44,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:31:44,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356698251] [2023-08-24 14:31:44,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:31:44,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:31:44,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:31:45,099 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:31:45,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:31:45,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356698251] [2023-08-24 14:31:45,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356698251] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:31:45,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339842445] [2023-08-24 14:31:45,100 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 14:31:45,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:31:45,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:31:45,101 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 14:31:45,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-24 14:31:45,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:31:45,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-24 14:31:45,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:31:45,392 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:31:45,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:31:46,250 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:31:46,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339842445] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:31:46,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:31:46,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-24 14:31:46,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506611346] [2023-08-24 14:31:46,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:31:46,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 14:31:46,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:31:46,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 14:31:46,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2023-08-24 14:31:46,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-08-24 14:31:46,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 1709 transitions, 36444 flow. Second operand has 25 states, 25 states have (on average 81.72) internal successors, (2043), 25 states have internal predecessors, (2043), 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) [2023-08-24 14:31:46,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:31:46,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-08-24 14:31:46,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:31:57,369 INFO L124 PetriNetUnfolderBase]: 14292/23707 cut-off events. [2023-08-24 14:31:57,370 INFO L125 PetriNetUnfolderBase]: For 536699/536699 co-relation queries the response was YES. [2023-08-24 14:31:57,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204302 conditions, 23707 events. 14292/23707 cut-off events. For 536699/536699 co-relation queries the response was YES. Maximal size of possible extension queue 873. Compared 174520 event pairs, 259 based on Foata normal form. 204/23911 useless extension candidates. Maximal degree in co-relation 204049. Up to 10509 conditions per place. [2023-08-24 14:31:57,610 INFO L140 encePairwiseOnDemand]: 181/188 looper letters, 1482 selfloop transitions, 928 changer transitions 255/2665 dead transitions. [2023-08-24 14:31:57,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 2665 transitions, 62123 flow [2023-08-24 14:31:57,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-08-24 14:31:57,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-08-24 14:31:57,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 4930 transitions. [2023-08-24 14:31:57,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4600597237775289 [2023-08-24 14:31:57,614 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 4930 transitions. [2023-08-24 14:31:57,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 4930 transitions. [2023-08-24 14:31:57,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:31:57,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 4930 transitions. [2023-08-24 14:31:57,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 86.49122807017544) internal successors, (4930), 57 states have internal predecessors, (4930), 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) [2023-08-24 14:31:57,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 188.0) internal successors, (10904), 58 states have internal predecessors, (10904), 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) [2023-08-24 14:31:57,623 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 188.0) internal successors, (10904), 58 states have internal predecessors, (10904), 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) [2023-08-24 14:31:57,623 INFO L175 Difference]: Start difference. First operand has 367 places, 1709 transitions, 36444 flow. Second operand 57 states and 4930 transitions. [2023-08-24 14:31:57,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 2665 transitions, 62123 flow [2023-08-24 14:32:07,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 2665 transitions, 56089 flow, removed 2554 selfloop flow, removed 42 redundant places. [2023-08-24 14:32:07,347 INFO L231 Difference]: Finished difference. Result has 368 places, 2116 transitions, 45128 flow [2023-08-24 14:32:07,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=32815, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=570, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1095, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=45128, PETRI_PLACES=368, PETRI_TRANSITIONS=2116} [2023-08-24 14:32:07,348 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 338 predicate places. [2023-08-24 14:32:07,348 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 2116 transitions, 45128 flow [2023-08-24 14:32:07,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 81.72) internal successors, (2043), 25 states have internal predecessors, (2043), 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) [2023-08-24 14:32:07,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:32:07,349 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:32:07,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-24 14:32:07,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:32:07,553 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:32:07,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:32:07,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1135902489, now seen corresponding path program 8 times [2023-08-24 14:32:07,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:32:07,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346020973] [2023-08-24 14:32:07,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:32:07,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:32:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:32:07,911 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:32:07,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:32:07,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346020973] [2023-08-24 14:32:07,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346020973] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:32:07,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367158400] [2023-08-24 14:32:07,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 14:32:07,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:32:07,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:32:07,912 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 14:32:07,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-24 14:32:07,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 14:32:07,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:32:08,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-24 14:32:08,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:32:08,252 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:32:08,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:32:09,069 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:32:09,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367158400] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:32:09,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:32:09,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-24 14:32:09,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015919365] [2023-08-24 14:32:09,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:32:09,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 14:32:09,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:32:09,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 14:32:09,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2023-08-24 14:32:09,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 188 [2023-08-24 14:32:09,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 2116 transitions, 45128 flow. Second operand has 25 states, 25 states have (on average 79.88) internal successors, (1997), 25 states have internal predecessors, (1997), 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) [2023-08-24 14:32:09,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:32:09,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 188 [2023-08-24 14:32:09,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:32:22,720 INFO L124 PetriNetUnfolderBase]: 15612/25787 cut-off events. [2023-08-24 14:32:22,720 INFO L125 PetriNetUnfolderBase]: For 491025/491025 co-relation queries the response was YES. [2023-08-24 14:32:22,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213455 conditions, 25787 events. 15612/25787 cut-off events. For 491025/491025 co-relation queries the response was YES. Maximal size of possible extension queue 945. Compared 190487 event pairs, 283 based on Foata normal form. 306/26093 useless extension candidates. Maximal degree in co-relation 213295. Up to 12836 conditions per place. [2023-08-24 14:32:23,009 INFO L140 encePairwiseOnDemand]: 179/188 looper letters, 1765 selfloop transitions, 831 changer transitions 378/2974 dead transitions. [2023-08-24 14:32:23,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 2974 transitions, 67047 flow [2023-08-24 14:32:23,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-08-24 14:32:23,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2023-08-24 14:32:23,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 6615 transitions. [2023-08-24 14:32:23,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4453945596552653 [2023-08-24 14:32:23,016 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 6615 transitions. [2023-08-24 14:32:23,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 6615 transitions. [2023-08-24 14:32:23,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:32:23,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 6615 transitions. [2023-08-24 14:32:23,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 83.73417721518987) internal successors, (6615), 79 states have internal predecessors, (6615), 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) [2023-08-24 14:32:23,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 188.0) internal successors, (15040), 80 states have internal predecessors, (15040), 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) [2023-08-24 14:32:23,036 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 188.0) internal successors, (15040), 80 states have internal predecessors, (15040), 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) [2023-08-24 14:32:23,036 INFO L175 Difference]: Start difference. First operand has 368 places, 2116 transitions, 45128 flow. Second operand 79 states and 6615 transitions. [2023-08-24 14:32:23,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 2974 transitions, 67047 flow [2023-08-24 14:32:29,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 2974 transitions, 63528 flow, removed 1364 selfloop flow, removed 32 redundant places. [2023-08-24 14:32:29,607 INFO L231 Difference]: Finished difference. Result has 439 places, 2281 transitions, 49266 flow [2023-08-24 14:32:29,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=42457, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=609, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=49266, PETRI_PLACES=439, PETRI_TRANSITIONS=2281} [2023-08-24 14:32:29,609 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 409 predicate places. [2023-08-24 14:32:29,609 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 2281 transitions, 49266 flow [2023-08-24 14:32:29,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 79.88) internal successors, (1997), 25 states have internal predecessors, (1997), 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) [2023-08-24 14:32:29,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:32:29,609 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:32:29,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-24 14:32:29,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-24 14:32:29,813 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:32:29,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:32:29,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1451640993, now seen corresponding path program 9 times [2023-08-24 14:32:29,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:32:29,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068768661] [2023-08-24 14:32:29,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:32:29,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:32:29,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:32:30,168 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:32:30,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:32:30,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068768661] [2023-08-24 14:32:30,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068768661] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:32:30,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986781283] [2023-08-24 14:32:30,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 14:32:30,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:32:30,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:32:30,170 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 14:32:30,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-24 14:32:30,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-24 14:32:30,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:32:30,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-24 14:32:30,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:32:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:32:30,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:32:31,326 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:32:31,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986781283] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:32:31,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:32:31,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-24 14:32:31,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386515446] [2023-08-24 14:32:31,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:32:31,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 14:32:31,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:32:31,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 14:32:31,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-08-24 14:32:31,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 188 [2023-08-24 14:32:31,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 2281 transitions, 49266 flow. Second operand has 24 states, 24 states have (on average 79.79166666666667) internal successors, (1915), 24 states have internal predecessors, (1915), 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) [2023-08-24 14:32:31,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:32:31,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 188 [2023-08-24 14:32:31,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:32:48,427 INFO L124 PetriNetUnfolderBase]: 18332/30449 cut-off events. [2023-08-24 14:32:48,427 INFO L125 PetriNetUnfolderBase]: For 936424/936424 co-relation queries the response was YES. [2023-08-24 14:32:48,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274966 conditions, 30449 events. 18332/30449 cut-off events. For 936424/936424 co-relation queries the response was YES. Maximal size of possible extension queue 1062. Compared 231634 event pairs, 307 based on Foata normal form. 426/30875 useless extension candidates. Maximal degree in co-relation 274804. Up to 10841 conditions per place. [2023-08-24 14:32:48,940 INFO L140 encePairwiseOnDemand]: 179/188 looper letters, 1610 selfloop transitions, 1459 changer transitions 526/3595 dead transitions. [2023-08-24 14:32:48,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 3595 transitions, 84102 flow [2023-08-24 14:32:48,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-08-24 14:32:48,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2023-08-24 14:32:48,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 7635 transitions. [2023-08-24 14:32:48,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446282440963292 [2023-08-24 14:32:48,944 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 7635 transitions. [2023-08-24 14:32:48,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 7635 transitions. [2023-08-24 14:32:48,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:32:48,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 7635 transitions. [2023-08-24 14:32:48,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 83.9010989010989) internal successors, (7635), 91 states have internal predecessors, (7635), 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) [2023-08-24 14:32:48,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 188.0) internal successors, (17296), 92 states have internal predecessors, (17296), 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) [2023-08-24 14:32:48,982 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 188.0) internal successors, (17296), 92 states have internal predecessors, (17296), 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) [2023-08-24 14:32:48,982 INFO L175 Difference]: Start difference. First operand has 439 places, 2281 transitions, 49266 flow. Second operand 91 states and 7635 transitions. [2023-08-24 14:32:48,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 3595 transitions, 84102 flow [2023-08-24 14:32:57,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 3595 transitions, 79716 flow, removed 1827 selfloop flow, removed 45 redundant places. [2023-08-24 14:32:57,727 INFO L231 Difference]: Finished difference. Result has 490 places, 2644 transitions, 61064 flow [2023-08-24 14:32:57,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=47021, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1096, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1063, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=61064, PETRI_PLACES=490, PETRI_TRANSITIONS=2644} [2023-08-24 14:32:57,730 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 460 predicate places. [2023-08-24 14:32:57,730 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 2644 transitions, 61064 flow [2023-08-24 14:32:57,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 79.79166666666667) internal successors, (1915), 24 states have internal predecessors, (1915), 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) [2023-08-24 14:32:57,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:32:57,730 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:32:57,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-24 14:32:57,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-24 14:32:57,944 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:32:57,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:32:57,944 INFO L85 PathProgramCache]: Analyzing trace with hash 803922319, now seen corresponding path program 10 times [2023-08-24 14:32:57,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:32:57,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908902785] [2023-08-24 14:32:57,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:32:57,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:32:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:32:58,302 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:32:58,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:32:58,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908902785] [2023-08-24 14:32:58,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908902785] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:32:58,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46716117] [2023-08-24 14:32:58,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 14:32:58,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:32:58,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:32:58,303 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 14:32:58,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-24 14:32:58,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 14:32:58,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:32:58,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-24 14:32:58,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:32:58,784 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:32:58,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:32:59,641 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:32:59,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46716117] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:32:59,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:32:59,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-08-24 14:32:59,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654730281] [2023-08-24 14:32:59,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:32:59,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 14:32:59,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:32:59,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 14:32:59,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2023-08-24 14:32:59,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-08-24 14:32:59,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 2644 transitions, 61064 flow. Second operand has 27 states, 27 states have (on average 81.74074074074075) internal successors, (2207), 27 states have internal predecessors, (2207), 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) [2023-08-24 14:32:59,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:32:59,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-08-24 14:32:59,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:33:22,351 INFO L124 PetriNetUnfolderBase]: 21565/36016 cut-off events. [2023-08-24 14:33:22,351 INFO L125 PetriNetUnfolderBase]: For 1495109/1495109 co-relation queries the response was YES. [2023-08-24 14:33:22,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349877 conditions, 36016 events. 21565/36016 cut-off events. For 1495109/1495109 co-relation queries the response was YES. Maximal size of possible extension queue 1268. Compared 283183 event pairs, 431 based on Foata normal form. 286/36302 useless extension candidates. Maximal degree in co-relation 347135. Up to 13170 conditions per place. [2023-08-24 14:33:23,022 INFO L140 encePairwiseOnDemand]: 181/188 looper letters, 2024 selfloop transitions, 1582 changer transitions 639/4245 dead transitions. [2023-08-24 14:33:23,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 4245 transitions, 105042 flow [2023-08-24 14:33:23,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-08-24 14:33:23,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2023-08-24 14:33:23,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 7341 transitions. [2023-08-24 14:33:23,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4648556231003039 [2023-08-24 14:33:23,027 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 7341 transitions. [2023-08-24 14:33:23,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 7341 transitions. [2023-08-24 14:33:23,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:33:23,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 7341 transitions. [2023-08-24 14:33:23,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 87.39285714285714) internal successors, (7341), 84 states have internal predecessors, (7341), 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) [2023-08-24 14:33:23,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 188.0) internal successors, (15980), 85 states have internal predecessors, (15980), 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) [2023-08-24 14:33:23,039 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 188.0) internal successors, (15980), 85 states have internal predecessors, (15980), 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) [2023-08-24 14:33:23,039 INFO L175 Difference]: Start difference. First operand has 490 places, 2644 transitions, 61064 flow. Second operand 84 states and 7341 transitions. [2023-08-24 14:33:23,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 4245 transitions, 105042 flow [2023-08-24 14:33:38,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 4245 transitions, 98641 flow, removed 3059 selfloop flow, removed 55 redundant places. [2023-08-24 14:33:38,837 INFO L231 Difference]: Finished difference. Result has 510 places, 3105 transitions, 75429 flow [2023-08-24 14:33:38,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=58329, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=75429, PETRI_PLACES=510, PETRI_TRANSITIONS=3105} [2023-08-24 14:33:38,840 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 480 predicate places. [2023-08-24 14:33:38,840 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 3105 transitions, 75429 flow [2023-08-24 14:33:38,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 81.74074074074075) internal successors, (2207), 27 states have internal predecessors, (2207), 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) [2023-08-24 14:33:38,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:33:38,840 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:33:38,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-24 14:33:39,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:33:39,045 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:33:39,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:33:39,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1442996798, now seen corresponding path program 11 times [2023-08-24 14:33:39,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:33:39,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056711494] [2023-08-24 14:33:39,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:33:39,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:33:39,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:33:39,549 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:33:39,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:33:39,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056711494] [2023-08-24 14:33:39,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056711494] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:33:39,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885242988] [2023-08-24 14:33:39,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 14:33:39,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:33:39,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:33:39,553 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 14:33:39,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-24 14:33:39,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-08-24 14:33:39,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:33:39,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-24 14:33:39,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:33:40,180 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:33:40,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:33:42,053 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:33:42,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885242988] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:33:42,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:33:42,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-24 14:33:42,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035372345] [2023-08-24 14:33:42,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:33:42,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 14:33:42,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:33:42,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 14:33:42,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2023-08-24 14:33:42,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-08-24 14:33:42,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 3105 transitions, 75429 flow. Second operand has 30 states, 30 states have (on average 81.46666666666667) internal successors, (2444), 30 states have internal predecessors, (2444), 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) [2023-08-24 14:33:42,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:33:42,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-08-24 14:33:42,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:34:15,173 INFO L124 PetriNetUnfolderBase]: 25724/42947 cut-off events. [2023-08-24 14:34:15,173 INFO L125 PetriNetUnfolderBase]: For 1608596/1608596 co-relation queries the response was YES. [2023-08-24 14:34:16,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411304 conditions, 42947 events. 25724/42947 cut-off events. For 1608596/1608596 co-relation queries the response was YES. Maximal size of possible extension queue 1520. Compared 346858 event pairs, 425 based on Foata normal form. 704/43651 useless extension candidates. Maximal degree in co-relation 410683. Up to 14747 conditions per place. [2023-08-24 14:34:16,618 INFO L140 encePairwiseOnDemand]: 181/188 looper letters, 2079 selfloop transitions, 1907 changer transitions 1292/5278 dead transitions. [2023-08-24 14:34:16,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 5278 transitions, 134202 flow [2023-08-24 14:34:16,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2023-08-24 14:34:16,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2023-08-24 14:34:16,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 9501 transitions. [2023-08-24 14:34:16,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46364434901424945 [2023-08-24 14:34:16,646 INFO L72 ComplementDD]: Start complementDD. Operand 109 states and 9501 transitions. [2023-08-24 14:34:16,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 109 states and 9501 transitions. [2023-08-24 14:34:16,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:34:16,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 109 states and 9501 transitions. [2023-08-24 14:34:16,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 110 states, 109 states have (on average 87.1651376146789) internal successors, (9501), 109 states have internal predecessors, (9501), 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) [2023-08-24 14:34:16,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 110 states, 110 states have (on average 188.0) internal successors, (20680), 110 states have internal predecessors, (20680), 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) [2023-08-24 14:34:16,661 INFO L81 ComplementDD]: Finished complementDD. Result has 110 states, 110 states have (on average 188.0) internal successors, (20680), 110 states have internal predecessors, (20680), 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) [2023-08-24 14:34:16,662 INFO L175 Difference]: Start difference. First operand has 510 places, 3105 transitions, 75429 flow. Second operand 109 states and 9501 transitions. [2023-08-24 14:34:16,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 5278 transitions, 134202 flow [2023-08-24 14:34:39,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 5278 transitions, 128740 flow, removed 2623 selfloop flow, removed 39 redundant places. [2023-08-24 14:34:39,606 INFO L231 Difference]: Finished difference. Result has 588 places, 3389 transitions, 87387 flow [2023-08-24 14:34:39,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=72479, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1399, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=109, PETRI_FLOW=87387, PETRI_PLACES=588, PETRI_TRANSITIONS=3389} [2023-08-24 14:34:39,608 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 558 predicate places. [2023-08-24 14:34:39,608 INFO L495 AbstractCegarLoop]: Abstraction has has 588 places, 3389 transitions, 87387 flow [2023-08-24 14:34:39,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 81.46666666666667) internal successors, (2444), 30 states have internal predecessors, (2444), 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) [2023-08-24 14:34:39,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:34:39,608 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:34:39,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-24 14:34:39,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:34:39,813 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:34:39,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:34:39,813 INFO L85 PathProgramCache]: Analyzing trace with hash -850836740, now seen corresponding path program 12 times [2023-08-24 14:34:39,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:34:39,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110848179] [2023-08-24 14:34:39,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:34:39,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:34:39,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:34:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:34:40,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:34:40,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110848179] [2023-08-24 14:34:40,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110848179] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:34:40,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682701222] [2023-08-24 14:34:40,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 14:34:40,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:34:40,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:34:40,350 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 14:34:40,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-24 14:34:40,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-08-24 14:34:40,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:34:40,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-24 14:34:40,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:34:40,930 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:34:40,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:34:42,118 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:34:42,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682701222] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:34:42,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:34:42,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2023-08-24 14:34:42,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322735426] [2023-08-24 14:34:42,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:34:42,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 14:34:42,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:34:42,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 14:34:42,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2023-08-24 14:34:42,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 188 [2023-08-24 14:34:42,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 588 places, 3389 transitions, 87387 flow. Second operand has 31 states, 31 states have (on average 79.70967741935483) internal successors, (2471), 31 states have internal predecessors, (2471), 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) [2023-08-24 14:34:42,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:34:42,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 188 [2023-08-24 14:34:42,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:35:17,469 INFO L124 PetriNetUnfolderBase]: 25906/43125 cut-off events. [2023-08-24 14:35:17,470 INFO L125 PetriNetUnfolderBase]: For 1633246/1633246 co-relation queries the response was YES. [2023-08-24 14:35:18,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421895 conditions, 43125 events. 25906/43125 cut-off events. For 1633246/1633246 co-relation queries the response was YES. Maximal size of possible extension queue 1462. Compared 344421 event pairs, 757 based on Foata normal form. 320/43445 useless extension candidates. Maximal degree in co-relation 421713. Up to 19042 conditions per place. [2023-08-24 14:35:18,467 INFO L140 encePairwiseOnDemand]: 179/188 looper letters, 2747 selfloop transitions, 1586 changer transitions 359/4692 dead transitions. [2023-08-24 14:35:18,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 4692 transitions, 126755 flow [2023-08-24 14:35:18,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-08-24 14:35:18,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2023-08-24 14:35:18,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 7332 transitions. [2023-08-24 14:35:18,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4482758620689655 [2023-08-24 14:35:18,471 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 7332 transitions. [2023-08-24 14:35:18,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 7332 transitions. [2023-08-24 14:35:18,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:35:18,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 7332 transitions. [2023-08-24 14:35:18,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 84.27586206896552) internal successors, (7332), 87 states have internal predecessors, (7332), 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) [2023-08-24 14:35:18,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 188.0) internal successors, (16544), 88 states have internal predecessors, (16544), 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) [2023-08-24 14:35:18,483 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 188.0) internal successors, (16544), 88 states have internal predecessors, (16544), 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) [2023-08-24 14:35:18,483 INFO L175 Difference]: Start difference. First operand has 588 places, 3389 transitions, 87387 flow. Second operand 87 states and 7332 transitions. [2023-08-24 14:35:18,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 4692 transitions, 126755 flow [2023-08-24 14:35:42,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 4692 transitions, 120932 flow, removed 2719 selfloop flow, removed 57 redundant places. [2023-08-24 14:35:42,435 INFO L231 Difference]: Finished difference. Result has 598 places, 3880 transitions, 101704 flow [2023-08-24 14:35:42,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=82880, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=101704, PETRI_PLACES=598, PETRI_TRANSITIONS=3880} [2023-08-24 14:35:42,438 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 568 predicate places. [2023-08-24 14:35:42,438 INFO L495 AbstractCegarLoop]: Abstraction has has 598 places, 3880 transitions, 101704 flow [2023-08-24 14:35:42,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 79.70967741935483) internal successors, (2471), 31 states have internal predecessors, (2471), 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) [2023-08-24 14:35:42,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:35:42,439 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:35:42,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-24 14:35:42,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-24 14:35:42,643 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:35:42,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:35:42,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1641845687, now seen corresponding path program 13 times [2023-08-24 14:35:42,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:35:42,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231849868] [2023-08-24 14:35:42,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:35:42,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:35:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:35:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:35:43,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:35:43,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231849868] [2023-08-24 14:35:43,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231849868] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:35:43,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935278428] [2023-08-24 14:35:43,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 14:35:43,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:35:43,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:35:43,213 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 14:35:43,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-24 14:35:43,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:35:43,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-24 14:35:43,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:35:43,901 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:35:43,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:35:45,687 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:35:45,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935278428] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:35:45,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:35:45,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-24 14:35:45,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685109189] [2023-08-24 14:35:45,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:35:45,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 14:35:45,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:35:45,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 14:35:45,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=693, Unknown=0, NotChecked=0, Total=870 [2023-08-24 14:35:45,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-08-24 14:35:45,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 598 places, 3880 transitions, 101704 flow. Second operand has 30 states, 30 states have (on average 81.4) internal successors, (2442), 30 states have internal predecessors, (2442), 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) [2023-08-24 14:35:45,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:35:45,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-08-24 14:35:45,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:36:39,655 INFO L124 PetriNetUnfolderBase]: 31663/52832 cut-off events. [2023-08-24 14:36:39,656 INFO L125 PetriNetUnfolderBase]: For 2350430/2350430 co-relation queries the response was YES. [2023-08-24 14:36:41,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544112 conditions, 52832 events. 31663/52832 cut-off events. For 2350430/2350430 co-relation queries the response was YES. Maximal size of possible extension queue 1651. Compared 435358 event pairs, 639 based on Foata normal form. 608/53440 useless extension candidates. Maximal degree in co-relation 543896. Up to 18433 conditions per place. [2023-08-24 14:36:41,281 INFO L140 encePairwiseOnDemand]: 181/188 looper letters, 2840 selfloop transitions, 2257 changer transitions 1178/6275 dead transitions. [2023-08-24 14:36:41,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 683 places, 6275 transitions, 172065 flow [2023-08-24 14:36:41,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2023-08-24 14:36:41,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2023-08-24 14:36:41,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 10280 transitions. [2023-08-24 14:36:41,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46339704291381173 [2023-08-24 14:36:41,301 INFO L72 ComplementDD]: Start complementDD. Operand 118 states and 10280 transitions. [2023-08-24 14:36:41,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 118 states and 10280 transitions. [2023-08-24 14:36:41,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:36:41,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 118 states and 10280 transitions. [2023-08-24 14:36:41,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 119 states, 118 states have (on average 87.11864406779661) internal successors, (10280), 118 states have internal predecessors, (10280), 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) [2023-08-24 14:36:41,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 119 states, 119 states have (on average 188.0) internal successors, (22372), 119 states have internal predecessors, (22372), 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) [2023-08-24 14:36:41,341 INFO L81 ComplementDD]: Finished complementDD. Result has 119 states, 119 states have (on average 188.0) internal successors, (22372), 119 states have internal predecessors, (22372), 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) [2023-08-24 14:36:41,341 INFO L175 Difference]: Start difference. First operand has 598 places, 3880 transitions, 101704 flow. Second operand 118 states and 10280 transitions. [2023-08-24 14:36:41,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 683 places, 6275 transitions, 172065 flow [2023-08-24 14:37:18,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 633 places, 6275 transitions, 164730 flow, removed 3538 selfloop flow, removed 50 redundant places. [2023-08-24 14:37:18,684 INFO L231 Difference]: Finished difference. Result has 669 places, 4446 transitions, 122252 flow [2023-08-24 14:37:18,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=97599, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3880, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1605, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=118, PETRI_FLOW=122252, PETRI_PLACES=669, PETRI_TRANSITIONS=4446} [2023-08-24 14:37:18,687 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 639 predicate places. [2023-08-24 14:37:18,687 INFO L495 AbstractCegarLoop]: Abstraction has has 669 places, 4446 transitions, 122252 flow [2023-08-24 14:37:18,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 81.4) internal successors, (2442), 30 states have internal predecessors, (2442), 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) [2023-08-24 14:37:18,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:37:18,688 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:37:18,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-24 14:37:18,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-24 14:37:18,892 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:37:18,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:37:18,892 INFO L85 PathProgramCache]: Analyzing trace with hash -653362622, now seen corresponding path program 14 times [2023-08-24 14:37:18,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:37:18,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749321215] [2023-08-24 14:37:18,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:37:18,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:37:18,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:37:19,579 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:37:19,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:37:19,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749321215] [2023-08-24 14:37:19,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749321215] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:37:19,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955287664] [2023-08-24 14:37:19,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 14:37:19,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:37:19,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:37:19,598 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 14:37:19,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-24 14:37:19,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 14:37:19,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:37:19,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-24 14:37:19,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:37:20,185 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:37:20,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:37:22,128 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:37:22,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955287664] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:37:22,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:37:22,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-24 14:37:22,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687573869] [2023-08-24 14:37:22,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:37:22,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 14:37:22,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:37:22,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 14:37:22,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2023-08-24 14:37:22,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 188 [2023-08-24 14:37:22,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 669 places, 4446 transitions, 122252 flow. Second operand has 30 states, 30 states have (on average 79.53333333333333) internal successors, (2386), 30 states have internal predecessors, (2386), 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) [2023-08-24 14:37:22,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:37:22,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 188 [2023-08-24 14:37:22,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:38:34,926 INFO L124 PetriNetUnfolderBase]: 34552/57341 cut-off events. [2023-08-24 14:38:34,926 INFO L125 PetriNetUnfolderBase]: For 2630139/2630139 co-relation queries the response was YES. [2023-08-24 14:38:36,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 597927 conditions, 57341 events. 34552/57341 cut-off events. For 2630139/2630139 co-relation queries the response was YES. Maximal size of possible extension queue 1917. Compared 474866 event pairs, 773 based on Foata normal form. 752/58093 useless extension candidates. Maximal degree in co-relation 597551. Up to 23525 conditions per place. [2023-08-24 14:38:36,784 INFO L140 encePairwiseOnDemand]: 179/188 looper letters, 3528 selfloop transitions, 2106 changer transitions 914/6548 dead transitions. [2023-08-24 14:38:36,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 780 places, 6548 transitions, 189297 flow [2023-08-24 14:38:36,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2023-08-24 14:38:36,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2023-08-24 14:38:36,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 13259 transitions. [2023-08-24 14:38:36,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4435634952495651 [2023-08-24 14:38:36,791 INFO L72 ComplementDD]: Start complementDD. Operand 159 states and 13259 transitions. [2023-08-24 14:38:36,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 159 states and 13259 transitions. [2023-08-24 14:38:36,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:38:36,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 159 states and 13259 transitions. [2023-08-24 14:38:36,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 160 states, 159 states have (on average 83.38993710691824) internal successors, (13259), 159 states have internal predecessors, (13259), 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) [2023-08-24 14:38:36,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 160 states, 160 states have (on average 188.0) internal successors, (30080), 160 states have internal predecessors, (30080), 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) [2023-08-24 14:38:36,812 INFO L81 ComplementDD]: Finished complementDD. Result has 160 states, 160 states have (on average 188.0) internal successors, (30080), 160 states have internal predecessors, (30080), 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) [2023-08-24 14:38:36,812 INFO L175 Difference]: Start difference. First operand has 669 places, 4446 transitions, 122252 flow. Second operand 159 states and 13259 transitions. [2023-08-24 14:38:36,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 780 places, 6548 transitions, 189297 flow [2023-08-24 14:39:22,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 724 places, 6548 transitions, 182189 flow, removed 3384 selfloop flow, removed 56 redundant places. [2023-08-24 14:39:22,580 INFO L231 Difference]: Finished difference. Result has 816 places, 4982 transitions, 142347 flow [2023-08-24 14:39:22,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=116572, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1552, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2708, PETRI_DIFFERENCE_SUBTRAHEND_STATES=159, PETRI_FLOW=142347, PETRI_PLACES=816, PETRI_TRANSITIONS=4982} [2023-08-24 14:39:22,583 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 786 predicate places. [2023-08-24 14:39:22,583 INFO L495 AbstractCegarLoop]: Abstraction has has 816 places, 4982 transitions, 142347 flow [2023-08-24 14:39:22,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 79.53333333333333) internal successors, (2386), 30 states have internal predecessors, (2386), 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) [2023-08-24 14:39:22,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:39:22,584 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:39:22,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-24 14:39:22,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-24 14:39:22,788 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:39:22,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:39:22,788 INFO L85 PathProgramCache]: Analyzing trace with hash -2051356534, now seen corresponding path program 15 times [2023-08-24 14:39:22,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:39:22,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676793161] [2023-08-24 14:39:22,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:39:22,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:39:22,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:39:23,259 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:39:23,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:39:23,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676793161] [2023-08-24 14:39:23,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676793161] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:39:23,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224825223] [2023-08-24 14:39:23,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 14:39:23,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:39:23,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:39:23,261 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 14:39:23,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-24 14:39:23,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-08-24 14:39:23,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:39:23,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-24 14:39:23,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:39:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:39:23,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:39:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:39:25,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224825223] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:39:25,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:39:25,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2023-08-24 14:39:25,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619259785] [2023-08-24 14:39:25,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:39:25,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 14:39:25,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:39:25,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 14:39:25,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2023-08-24 14:39:25,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 188 [2023-08-24 14:39:25,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 816 places, 4982 transitions, 142347 flow. Second operand has 31 states, 31 states have (on average 79.70967741935483) internal successors, (2471), 31 states have internal predecessors, (2471), 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) [2023-08-24 14:39:25,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:39:25,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 188 [2023-08-24 14:39:25,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:40:33,628 INFO L124 PetriNetUnfolderBase]: 36237/60148 cut-off events. [2023-08-24 14:40:33,628 INFO L125 PetriNetUnfolderBase]: For 5076464/5076464 co-relation queries the response was YES. [2023-08-24 14:40:36,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709269 conditions, 60148 events. 36237/60148 cut-off events. For 5076464/5076464 co-relation queries the response was YES. Maximal size of possible extension queue 2100. Compared 502544 event pairs, 763 based on Foata normal form. 472/60620 useless extension candidates. Maximal degree in co-relation 708808. Up to 32002 conditions per place. [2023-08-24 14:40:36,992 INFO L140 encePairwiseOnDemand]: 179/188 looper letters, 4107 selfloop transitions, 1706 changer transitions 577/6390 dead transitions. [2023-08-24 14:40:36,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 854 places, 6390 transitions, 197613 flow [2023-08-24 14:40:36,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2023-08-24 14:40:36,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2023-08-24 14:40:36,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 9955 transitions. [2023-08-24 14:40:36,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4449758626854997 [2023-08-24 14:40:36,997 INFO L72 ComplementDD]: Start complementDD. Operand 119 states and 9955 transitions. [2023-08-24 14:40:36,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 119 states and 9955 transitions. [2023-08-24 14:40:36,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:40:36,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 119 states and 9955 transitions. [2023-08-24 14:40:37,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 120 states, 119 states have (on average 83.65546218487395) internal successors, (9955), 119 states have internal predecessors, (9955), 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) [2023-08-24 14:40:37,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 120 states, 120 states have (on average 188.0) internal successors, (22560), 120 states have internal predecessors, (22560), 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) [2023-08-24 14:40:37,013 INFO L81 ComplementDD]: Finished complementDD. Result has 120 states, 120 states have (on average 188.0) internal successors, (22560), 120 states have internal predecessors, (22560), 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) [2023-08-24 14:40:37,013 INFO L175 Difference]: Start difference. First operand has 816 places, 4982 transitions, 142347 flow. Second operand 119 states and 9955 transitions. [2023-08-24 14:40:37,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 854 places, 6390 transitions, 197613 flow [2023-08-24 14:42:08,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 761 places, 6390 transitions, 186065 flow, removed 5352 selfloop flow, removed 93 redundant places. [2023-08-24 14:42:08,200 INFO L231 Difference]: Finished difference. Result has 834 places, 5335 transitions, 153767 flow [2023-08-24 14:42:08,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=134831, PETRI_DIFFERENCE_MINUEND_PLACES=643, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4969, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1286, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=119, PETRI_FLOW=153767, PETRI_PLACES=834, PETRI_TRANSITIONS=5335} [2023-08-24 14:42:08,204 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 804 predicate places. [2023-08-24 14:42:08,204 INFO L495 AbstractCegarLoop]: Abstraction has has 834 places, 5335 transitions, 153767 flow [2023-08-24 14:42:08,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 79.70967741935483) internal successors, (2471), 31 states have internal predecessors, (2471), 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) [2023-08-24 14:42:08,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:42:08,204 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:42:08,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-24 14:42:08,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:42:08,409 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:42:08,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:42:08,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1194600417, now seen corresponding path program 16 times [2023-08-24 14:42:08,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:42:08,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199541544] [2023-08-24 14:42:08,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:42:08,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:42:08,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:42:08,970 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:42:08,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:42:08,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199541544] [2023-08-24 14:42:08,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199541544] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:42:08,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070767620] [2023-08-24 14:42:08,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 14:42:08,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:42:08,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:42:08,971 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 14:42:08,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-24 14:42:09,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 14:42:09,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:42:09,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-24 14:42:09,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:42:09,515 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:42:09,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:42:11,174 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:42:11,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070767620] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:42:11,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:42:11,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-24 14:42:11,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122840529] [2023-08-24 14:42:11,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:42:11,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 14:42:11,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:42:11,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 14:42:11,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=676, Unknown=0, NotChecked=0, Total=870 [2023-08-24 14:42:11,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-08-24 14:42:11,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 834 places, 5335 transitions, 153767 flow. Second operand has 30 states, 30 states have (on average 81.4) internal successors, (2442), 30 states have internal predecessors, (2442), 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) [2023-08-24 14:42:11,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:42:11,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-08-24 14:42:11,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:43:42,544 INFO L124 PetriNetUnfolderBase]: 40459/67276 cut-off events. [2023-08-24 14:43:42,544 INFO L125 PetriNetUnfolderBase]: For 6834551/6834551 co-relation queries the response was YES. [2023-08-24 14:43:45,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 842014 conditions, 67276 events. 40459/67276 cut-off events. For 6834551/6834551 co-relation queries the response was YES. Maximal size of possible extension queue 2355. Compared 571234 event pairs, 791 based on Foata normal form. 754/68030 useless extension candidates. Maximal degree in co-relation 839506. Up to 31001 conditions per place. [2023-08-24 14:43:46,115 INFO L140 encePairwiseOnDemand]: 181/188 looper letters, 4057 selfloop transitions, 2190 changer transitions 938/7185 dead transitions. [2023-08-24 14:43:46,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 862 places, 7185 transitions, 234088 flow [2023-08-24 14:43:46,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-08-24 14:43:46,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2023-08-24 14:43:46,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 8367 transitions. [2023-08-24 14:43:46,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458817723184909 [2023-08-24 14:43:46,119 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 8367 transitions. [2023-08-24 14:43:46,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 8367 transitions. [2023-08-24 14:43:46,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:43:46,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 8367 transitions. [2023-08-24 14:43:46,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 86.25773195876289) internal successors, (8367), 97 states have internal predecessors, (8367), 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) [2023-08-24 14:43:46,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 188.0) internal successors, (18424), 98 states have internal predecessors, (18424), 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) [2023-08-24 14:43:46,133 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 188.0) internal successors, (18424), 98 states have internal predecessors, (18424), 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) [2023-08-24 14:43:46,133 INFO L175 Difference]: Start difference. First operand has 834 places, 5335 transitions, 153767 flow. Second operand 97 states and 8367 transitions. [2023-08-24 14:43:46,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 862 places, 7185 transitions, 234088 flow Received shutdown request... [2023-08-24 14:43:59,205 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 14:43:59,206 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 14:43:59,436 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-24 14:43:59,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-24 14:43:59,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-24 14:43:59,641 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-08-24 14:43:59,643 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-24 14:43:59,643 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-24 14:43:59,643 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-24 14:43:59,643 INFO L445 BasicCegarLoop]: Path program histogram: [16, 6, 5, 2] [2023-08-24 14:43:59,645 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 14:43:59,645 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 14:43:59,647 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 02:43:59 BasicIcfg [2023-08-24 14:43:59,647 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 14:43:59,647 INFO L158 Benchmark]: Toolchain (without parser) took 817283.95ms. Allocated memory was 354.4MB in the beginning and 7.7GB in the end (delta: 7.4GB). Free memory was 330.2MB in the beginning and 1.9GB in the end (delta: -1.5GB). Peak memory consumption was 6.2GB. Max. memory is 16.0GB. [2023-08-24 14:43:59,647 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 354.4MB. Free memory is still 331.5MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 14:43:59,647 INFO L158 Benchmark]: CACSL2BoogieTranslator took 188.67ms. Allocated memory is still 354.4MB. Free memory was 329.6MB in the beginning and 318.2MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 14:43:59,647 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.38ms. Allocated memory is still 354.4MB. Free memory was 318.2MB in the beginning and 316.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 14:43:59,648 INFO L158 Benchmark]: Boogie Preprocessor took 14.73ms. Allocated memory is still 354.4MB. Free memory was 316.1MB in the beginning and 315.2MB in the end (delta: 887.1kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 14:43:59,648 INFO L158 Benchmark]: RCFGBuilder took 373.54ms. Allocated memory is still 354.4MB. Free memory was 315.2MB in the beginning and 295.1MB in the end (delta: 20.1MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-24 14:43:59,648 INFO L158 Benchmark]: TraceAbstraction took 816680.50ms. Allocated memory was 354.4MB in the beginning and 7.7GB in the end (delta: 7.4GB). Free memory was 294.2MB in the beginning and 1.9GB in the end (delta: -1.6GB). Peak memory consumption was 6.1GB. Max. memory is 16.0GB. [2023-08-24 14:43:59,649 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 354.4MB. Free memory is still 331.5MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 188.67ms. Allocated memory is still 354.4MB. Free memory was 329.6MB in the beginning and 318.2MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 22.38ms. Allocated memory is still 354.4MB. Free memory was 318.2MB in the beginning and 316.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 14.73ms. Allocated memory is still 354.4MB. Free memory was 316.1MB in the beginning and 315.2MB in the end (delta: 887.1kB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 373.54ms. Allocated memory is still 354.4MB. Free memory was 315.2MB in the beginning and 295.1MB in the end (delta: 20.1MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 816680.50ms. Allocated memory was 354.4MB in the beginning and 7.7GB in the end (delta: 7.4GB). Free memory was 294.2MB in the beginning and 1.9GB in the end (delta: -1.6GB). Peak memory consumption was 6.1GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.7s, 99 PlacesBefore, 30 PlacesAfterwards, 96 TransitionsBefore, 22 TransitionsAfterwards, 1370 CoEnabledTransitionPairs, 7 FixpointIterations, 39 TrivialSequentialCompositions, 28 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 4 ConcurrentYvCompositions, 5 ChoiceCompositions, 79 TotalNumberOfCompositions, 1979 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1535, independent: 1491, independent conditional: 0, independent unconditional: 1491, dependent: 44, dependent conditional: 0, dependent unconditional: 44, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 738, independent: 723, independent conditional: 0, independent unconditional: 723, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1535, independent: 768, independent conditional: 0, independent unconditional: 768, dependent: 29, dependent conditional: 0, dependent unconditional: 29, unknown: 738, unknown conditional: 0, unknown unconditional: 738] , Statistics on independence cache: Total cache size (in pairs): 55, Positive cache size: 52, Positive conditional cache size: 0, Positive unconditional cache size: 52, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 120]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 113]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 114]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 115]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 134 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 816.6s, OverallIterations: 29, TraceHistogramMax: 6, PathProgramHistogramMax: 16, EmptinessCheckTime: 0.0s, AutomataDifference: 774.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 13910 SdHoareTripleChecker+Valid, 18.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 13910 mSDsluCounter, 48 SdHoareTripleChecker+Invalid, 15.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 27 mSDsCounter, 906 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 35495 IncrementalHoareTripleChecker+Invalid, 36401 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 906 mSolverCounterUnsat, 21 mSDtfsCounter, 35495 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2741 GetRequests, 804 SyntacticMatches, 20 SemanticMatches, 1917 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74474 ImplicationChecksByTransitivity, 69.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=153767occurred in iteration=28, InterpolantAutomatonStates: 1525, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 32.3s InterpolantComputationTime, 1286 NumberOfCodeBlocks, 1286 NumberOfCodeBlocksAsserted, 99 NumberOfCheckSat, 1775 ConstructedInterpolants, 0 QuantifiedInterpolants, 36838 SizeOfPredicates, 528 NumberOfNonLiveVariables, 3396 ConjunctsInSsa, 299 ConjunctsInUnsatCore, 69 InterpolantComputations, 9 PerfectInterpolantSequences, 164/991 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown