/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-lit/sssc12-pthread.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:30:14,554 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:30:14,621 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 11:30:14,644 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:30:14,645 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:30:14,645 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:30:14,645 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:30:14,646 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:30:14,646 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:30:14,649 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:30:14,650 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:30:14,650 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:30:14,650 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:30:14,651 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:30:14,651 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:30:14,651 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:30:14,651 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:30:14,652 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:30:14,652 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:30:14,652 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:30:14,652 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:30:14,653 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:30:14,653 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:30:14,653 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:30:14,653 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:30:14,654 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:30:14,655 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:30:14,655 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:30:14,655 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:30:14,655 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:30:14,656 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:30:14,656 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:30:14,656 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:30:14,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:30:14,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:30:14,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:30:14,869 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:30:14,870 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:30:14,870 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-lit/sssc12-pthread.i [2023-11-17 11:30:15,960 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:30:16,173 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:30:16,177 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-lit/sssc12-pthread.i [2023-11-17 11:30:16,196 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8a617e3b/720127bcf47f4763b785bd0648347bce/FLAG8d50905bd [2023-11-17 11:30:16,209 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8a617e3b/720127bcf47f4763b785bd0648347bce [2023-11-17 11:30:16,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:30:16,212 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:30:16,214 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:30:16,214 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:30:16,217 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:30:16,218 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:30:16" (1/1) ... [2023-11-17 11:30:16,219 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fc05073 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:30:16, skipping insertion in model container [2023-11-17 11:30:16,219 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:30:16" (1/1) ... [2023-11-17 11:30:16,270 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:30:16,515 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-17 11:30:16,577 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-lit/sssc12-pthread.i[47777,47790] [2023-11-17 11:30:16,597 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:30:16,606 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:30:16,632 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-17 11:30:16,638 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-lit/sssc12-pthread.i[47777,47790] [2023-11-17 11:30:16,651 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:30:16,693 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:30:16,699 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:30:16,699 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:30:16 WrapperNode [2023-11-17 11:30:16,699 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:30:16,700 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:30:16,700 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:30:16,700 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:30:16,705 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:30:16" (1/1) ... [2023-11-17 11:30:16,728 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:30:16" (1/1) ... [2023-11-17 11:30:16,747 INFO L138 Inliner]: procedures = 274, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 77 [2023-11-17 11:30:16,748 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:30:16,748 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:30:16,748 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:30:16,748 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:30:16,755 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:30:16" (1/1) ... [2023-11-17 11:30:16,755 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:30:16" (1/1) ... [2023-11-17 11:30:16,767 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:30:16" (1/1) ... [2023-11-17 11:30:16,768 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:30:16" (1/1) ... [2023-11-17 11:30:16,771 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:30:16" (1/1) ... [2023-11-17 11:30:16,773 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:30:16" (1/1) ... [2023-11-17 11:30:16,774 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:30:16" (1/1) ... [2023-11-17 11:30:16,775 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:30:16" (1/1) ... [2023-11-17 11:30:16,784 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:30:16,785 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:30:16,785 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:30:16,785 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:30:16,786 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:30:16" (1/1) ... [2023-11-17 11:30:16,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:30:16,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:30:16,850 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 11:30:16,873 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2023-11-17 11:30:16,873 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2023-11-17 11:30:16,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:30:16,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:30:16,873 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 11:30:16,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:30:16,874 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 11:30:16,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 11:30:16,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:30:16,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:30:16,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:30:16,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:30:16,875 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 11:30:16,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 11:30:16,965 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:30:16,967 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:30:17,192 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:30:17,354 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:30:17,354 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 11:30:17,355 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:30:17 BoogieIcfgContainer [2023-11-17 11:30:17,355 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:30:17,368 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:30:17,368 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:30:17,371 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:30:17,371 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:30:16" (1/3) ... [2023-11-17 11:30:17,371 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4025a58b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:30:17, skipping insertion in model container [2023-11-17 11:30:17,371 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:30:16" (2/3) ... [2023-11-17 11:30:17,371 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4025a58b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:30:17, skipping insertion in model container [2023-11-17 11:30:17,372 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:30:17" (3/3) ... [2023-11-17 11:30:17,372 INFO L112 eAbstractionObserver]: Analyzing ICFG sssc12-pthread.i [2023-11-17 11:30:17,384 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:30:17,385 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:30:17,385 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:30:17,404 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:30:17,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 19 places, 18 transitions, 40 flow [2023-11-17 11:30:17,439 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2023-11-17 11:30:17,440 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:30:17,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 20 events. 2/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2023-11-17 11:30:17,442 INFO L82 GeneralOperation]: Start removeDead. Operand has 19 places, 18 transitions, 40 flow [2023-11-17 11:30:17,444 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 19 places, 18 transitions, 40 flow [2023-11-17 11:30:17,447 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:30:17,454 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 19 places, 18 transitions, 40 flow [2023-11-17 11:30:17,456 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 19 places, 18 transitions, 40 flow [2023-11-17 11:30:17,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 19 places, 18 transitions, 40 flow [2023-11-17 11:30:17,461 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2023-11-17 11:30:17,461 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:30:17,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 20 events. 2/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2023-11-17 11:30:17,461 INFO L119 LiptonReduction]: Number of co-enabled transitions 96 [2023-11-17 11:30:17,830 INFO L134 LiptonReduction]: Checked pairs total: 130 [2023-11-17 11:30:17,830 INFO L136 LiptonReduction]: Total number of compositions: 11 [2023-11-17 11:30:17,850 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:30:17,872 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@742a9141, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:30:17,872 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 11:30:17,877 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:30:17,877 INFO L124 PetriNetUnfolderBase]: 1/10 cut-off events. [2023-11-17 11:30:17,877 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:30:17,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:30:17,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 11:30:17,878 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 11:30:17,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:30:17,882 INFO L85 PathProgramCache]: Analyzing trace with hash 216379326, now seen corresponding path program 1 times [2023-11-17 11:30:17,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:30:17,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023446806] [2023-11-17 11:30:17,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:30:17,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:30:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:30:18,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:30:18,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:30:18,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023446806] [2023-11-17 11:30:18,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023446806] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:30:18,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:30:18,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:30:18,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429262615] [2023-11-17 11:30:18,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:30:18,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 11:30:18,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:30:18,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 11:30:18,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 11:30:18,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-17 11:30:18,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 10 transitions, 24 flow. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:18,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:30:18,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-17 11:30:18,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:30:18,300 INFO L124 PetriNetUnfolderBase]: 13/34 cut-off events. [2023-11-17 11:30:18,300 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:30:18,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 34 events. 13/34 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 70 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 60. Up to 19 conditions per place. [2023-11-17 11:30:18,302 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 11 selfloop transitions, 3 changer transitions 0/15 dead transitions. [2023-11-17 11:30:18,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 14 places, 15 transitions, 62 flow [2023-11-17 11:30:18,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:30:18,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:30:18,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 38 transitions. [2023-11-17 11:30:18,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3275862068965517 [2023-11-17 11:30:18,314 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 38 transitions. [2023-11-17 11:30:18,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 38 transitions. [2023-11-17 11:30:18,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:30:18,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 38 transitions. [2023-11-17 11:30:18,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:18,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:18,319 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:18,321 INFO L175 Difference]: Start difference. First operand has 12 places, 10 transitions, 24 flow. Second operand 4 states and 38 transitions. [2023-11-17 11:30:18,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 14 places, 15 transitions, 62 flow [2023-11-17 11:30:18,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 15 transitions, 62 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:30:18,323 INFO L231 Difference]: Finished difference. Result has 15 places, 10 transitions, 36 flow [2023-11-17 11:30:18,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=22, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=36, PETRI_PLACES=15, PETRI_TRANSITIONS=10} [2023-11-17 11:30:18,327 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, 3 predicate places. [2023-11-17 11:30:18,327 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 10 transitions, 36 flow [2023-11-17 11:30:18,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:18,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:30:18,327 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 11:30:18,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:30:18,328 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 11:30:18,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:30:18,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1882215818, now seen corresponding path program 1 times [2023-11-17 11:30:18,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:30:18,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874651869] [2023-11-17 11:30:18,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:30:18,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:30:18,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:30:18,344 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:30:18,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:30:18,362 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:30:18,363 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:30:18,364 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 11:30:18,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 11:30:18,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 11:30:18,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:30:18,366 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:30:18,367 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:30:18,367 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:30:18,388 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:30:18,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 31 transitions, 72 flow [2023-11-17 11:30:18,400 INFO L124 PetriNetUnfolderBase]: 4/36 cut-off events. [2023-11-17 11:30:18,400 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:30:18,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 36 events. 4/36 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 62 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 27. Up to 3 conditions per place. [2023-11-17 11:30:18,401 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 31 transitions, 72 flow [2023-11-17 11:30:18,401 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 31 transitions, 72 flow [2023-11-17 11:30:18,401 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:30:18,401 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 32 places, 31 transitions, 72 flow [2023-11-17 11:30:18,402 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 32 places, 31 transitions, 72 flow [2023-11-17 11:30:18,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 31 transitions, 72 flow [2023-11-17 11:30:18,406 INFO L124 PetriNetUnfolderBase]: 4/36 cut-off events. [2023-11-17 11:30:18,406 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:30:18,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 36 events. 4/36 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 62 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 27. Up to 3 conditions per place. [2023-11-17 11:30:18,407 INFO L119 LiptonReduction]: Number of co-enabled transitions 504 [2023-11-17 11:30:18,741 INFO L134 LiptonReduction]: Checked pairs total: 1078 [2023-11-17 11:30:18,741 INFO L136 LiptonReduction]: Total number of compositions: 20 [2023-11-17 11:30:18,743 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:30:18,743 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@742a9141, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:30:18,744 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 11:30:18,746 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:30:18,746 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2023-11-17 11:30:18,746 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:30:18,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:30:18,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:30:18,747 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:30:18,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:30:18,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1656496685, now seen corresponding path program 1 times [2023-11-17 11:30:18,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:30:18,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148146552] [2023-11-17 11:30:18,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:30:18,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:30:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:30:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:30:18,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:30:18,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148146552] [2023-11-17 11:30:18,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148146552] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:30:18,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:30:18,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:30:18,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923504188] [2023-11-17 11:30:18,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:30:18,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:30:18,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:30:18,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:30:18,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:30:18,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 51 [2023-11-17 11:30:18,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:18,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:30:18,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 51 [2023-11-17 11:30:18,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:30:18,989 INFO L124 PetriNetUnfolderBase]: 305/500 cut-off events. [2023-11-17 11:30:18,990 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-11-17 11:30:18,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1029 conditions, 500 events. 305/500 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1842 event pairs, 62 based on Foata normal form. 0/377 useless extension candidates. Maximal degree in co-relation 896. Up to 295 conditions per place. [2023-11-17 11:30:18,993 INFO L140 encePairwiseOnDemand]: 44/51 looper letters, 35 selfloop transitions, 7 changer transitions 0/43 dead transitions. [2023-11-17 11:30:18,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 43 transitions, 195 flow [2023-11-17 11:30:18,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 11:30:18,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 11:30:18,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2023-11-17 11:30:18,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3607843137254902 [2023-11-17 11:30:18,995 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 92 transitions. [2023-11-17 11:30:18,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 92 transitions. [2023-11-17 11:30:18,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:30:18,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 92 transitions. [2023-11-17 11:30:18,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:18,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:18,996 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:18,997 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 48 flow. Second operand 5 states and 92 transitions. [2023-11-17 11:30:18,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 43 transitions, 195 flow [2023-11-17 11:30:18,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 43 transitions, 195 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:30:18,998 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 94 flow [2023-11-17 11:30:18,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=94, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2023-11-17 11:30:18,998 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 6 predicate places. [2023-11-17 11:30:18,998 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 94 flow [2023-11-17 11:30:18,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:18,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:30:18,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:30:18,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:30:18,999 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:30:18,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:30:18,999 INFO L85 PathProgramCache]: Analyzing trace with hash -188209936, now seen corresponding path program 1 times [2023-11-17 11:30:18,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:30:19,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132153105] [2023-11-17 11:30:19,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:30:19,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:30:19,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:30:19,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:30:19,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:30:19,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132153105] [2023-11-17 11:30:19,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132153105] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:30:19,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861297829] [2023-11-17 11:30:19,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:30:19,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:30:19,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:30:19,123 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:30:19,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 11:30:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:30:19,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 11:30:19,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:30:19,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:30:19,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:30:19,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:30:19,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861297829] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:30:19,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:30:19,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-11-17 11:30:19,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967804407] [2023-11-17 11:30:19,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:30:19,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 11:30:19,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:30:19,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 11:30:19,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-17 11:30:19,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 51 [2023-11-17 11:30:19,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 94 flow. Second operand has 13 states, 13 states have (on average 10.846153846153847) internal successors, (141), 13 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:19,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:30:19,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 51 [2023-11-17 11:30:19,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:30:19,819 INFO L124 PetriNetUnfolderBase]: 398/650 cut-off events. [2023-11-17 11:30:19,819 INFO L125 PetriNetUnfolderBase]: For 141/141 co-relation queries the response was YES. [2023-11-17 11:30:19,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1583 conditions, 650 events. 398/650 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2593 event pairs, 14 based on Foata normal form. 0/554 useless extension candidates. Maximal degree in co-relation 1406. Up to 129 conditions per place. [2023-11-17 11:30:19,823 INFO L140 encePairwiseOnDemand]: 44/51 looper letters, 69 selfloop transitions, 13 changer transitions 0/83 dead transitions. [2023-11-17 11:30:19,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 83 transitions, 417 flow [2023-11-17 11:30:19,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 11:30:19,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 11:30:19,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2023-11-17 11:30:19,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3244206773618538 [2023-11-17 11:30:19,825 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 182 transitions. [2023-11-17 11:30:19,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 182 transitions. [2023-11-17 11:30:19,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:30:19,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 182 transitions. [2023-11-17 11:30:19,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 16.545454545454547) internal successors, (182), 11 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:19,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 51.0) internal successors, (612), 12 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:19,828 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 51.0) internal successors, (612), 12 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:19,828 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 94 flow. Second operand 11 states and 182 transitions. [2023-11-17 11:30:19,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 83 transitions, 417 flow [2023-11-17 11:30:19,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 83 transitions, 417 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:30:19,830 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 153 flow [2023-11-17 11:30:19,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=153, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2023-11-17 11:30:19,831 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 20 predicate places. [2023-11-17 11:30:19,831 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 153 flow [2023-11-17 11:30:19,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.846153846153847) internal successors, (141), 13 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:19,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:30:19,831 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-17 11:30:19,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 11:30:20,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:30:20,038 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:30:20,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:30:20,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1210195669, now seen corresponding path program 1 times [2023-11-17 11:30:20,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:30:20,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871074792] [2023-11-17 11:30:20,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:30:20,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:30:20,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:30:20,048 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:30:20,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:30:20,055 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:30:20,055 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:30:20,055 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 11:30:20,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 11:30:20,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 11:30:20,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 11:30:20,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:30:20,056 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:30:20,056 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:30:20,056 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:30:20,068 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:30:20,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 44 transitions, 106 flow [2023-11-17 11:30:20,073 INFO L124 PetriNetUnfolderBase]: 6/52 cut-off events. [2023-11-17 11:30:20,073 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:30:20,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 52 events. 6/52 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 112 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 43. Up to 4 conditions per place. [2023-11-17 11:30:20,074 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 44 transitions, 106 flow [2023-11-17 11:30:20,074 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 44 transitions, 106 flow [2023-11-17 11:30:20,074 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:30:20,074 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 45 places, 44 transitions, 106 flow [2023-11-17 11:30:20,074 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 45 places, 44 transitions, 106 flow [2023-11-17 11:30:20,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 44 transitions, 106 flow [2023-11-17 11:30:20,078 INFO L124 PetriNetUnfolderBase]: 6/52 cut-off events. [2023-11-17 11:30:20,078 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:30:20,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 52 events. 6/52 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 112 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 43. Up to 4 conditions per place. [2023-11-17 11:30:20,079 INFO L119 LiptonReduction]: Number of co-enabled transitions 1224 [2023-11-17 11:30:20,714 INFO L134 LiptonReduction]: Checked pairs total: 2390 [2023-11-17 11:30:20,714 INFO L136 LiptonReduction]: Total number of compositions: 28 [2023-11-17 11:30:20,715 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:30:20,716 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@742a9141, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:30:20,716 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 11:30:20,717 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:30:20,717 INFO L124 PetriNetUnfolderBase]: 1/15 cut-off events. [2023-11-17 11:30:20,717 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:30:20,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:30:20,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:30:20,718 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:30:20,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:30:20,718 INFO L85 PathProgramCache]: Analyzing trace with hash 232079228, now seen corresponding path program 1 times [2023-11-17 11:30:20,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:30:20,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347334823] [2023-11-17 11:30:20,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:30:20,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:30:20,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:30:20,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:30:20,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:30:20,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347334823] [2023-11-17 11:30:20,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347334823] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:30:20,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:30:20,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:30:20,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608713916] [2023-11-17 11:30:20,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:30:20,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:30:20,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:30:20,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:30:20,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:30:20,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 72 [2023-11-17 11:30:20,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 70 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:20,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:30:20,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 72 [2023-11-17 11:30:20,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:30:21,188 INFO L124 PetriNetUnfolderBase]: 3177/4429 cut-off events. [2023-11-17 11:30:21,188 INFO L125 PetriNetUnfolderBase]: For 361/361 co-relation queries the response was YES. [2023-11-17 11:30:21,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9111 conditions, 4429 events. 3177/4429 cut-off events. For 361/361 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 19093 event pairs, 951 based on Foata normal form. 0/3262 useless extension candidates. Maximal degree in co-relation 6512. Up to 2785 conditions per place. [2023-11-17 11:30:21,209 INFO L140 encePairwiseOnDemand]: 64/72 looper letters, 53 selfloop transitions, 9 changer transitions 0/63 dead transitions. [2023-11-17 11:30:21,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 63 transitions, 304 flow [2023-11-17 11:30:21,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 11:30:21,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 11:30:21,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2023-11-17 11:30:21,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2023-11-17 11:30:21,211 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 132 transitions. [2023-11-17 11:30:21,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 132 transitions. [2023-11-17 11:30:21,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:30:21,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 132 transitions. [2023-11-17 11:30:21,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:21,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:21,212 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:21,212 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 70 flow. Second operand 5 states and 132 transitions. [2023-11-17 11:30:21,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 63 transitions, 304 flow [2023-11-17 11:30:21,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 63 transitions, 296 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-11-17 11:30:21,214 INFO L231 Difference]: Finished difference. Result has 36 places, 33 transitions, 129 flow [2023-11-17 11:30:21,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=129, PETRI_PLACES=36, PETRI_TRANSITIONS=33} [2023-11-17 11:30:21,215 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2023-11-17 11:30:21,215 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 33 transitions, 129 flow [2023-11-17 11:30:21,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:21,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:30:21,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:30:21,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:30:21,215 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:30:21,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:30:21,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1395477877, now seen corresponding path program 1 times [2023-11-17 11:30:21,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:30:21,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923116664] [2023-11-17 11:30:21,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:30:21,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:30:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:30:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:30:21,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:30:21,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923116664] [2023-11-17 11:30:21,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923116664] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:30:21,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695458078] [2023-11-17 11:30:21,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:30:21,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:30:21,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:30:21,326 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:30:21,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 11:30:21,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:30:21,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 11:30:21,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:30:21,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:30:21,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:30:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:30:21,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695458078] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:30:21,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:30:21,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-11-17 11:30:21,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133330762] [2023-11-17 11:30:21,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:30:21,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 11:30:21,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:30:21,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 11:30:21,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-17 11:30:21,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 72 [2023-11-17 11:30:21,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 129 flow. Second operand has 12 states, 12 states have (on average 14.75) internal successors, (177), 12 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:21,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:30:21,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 72 [2023-11-17 11:30:21,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:30:22,522 INFO L124 PetriNetUnfolderBase]: 4344/6049 cut-off events. [2023-11-17 11:30:22,522 INFO L125 PetriNetUnfolderBase]: For 1800/1800 co-relation queries the response was YES. [2023-11-17 11:30:22,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14547 conditions, 6049 events. 4344/6049 cut-off events. For 1800/1800 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 28596 event pairs, 315 based on Foata normal form. 0/4849 useless extension candidates. Maximal degree in co-relation 14368. Up to 1272 conditions per place. [2023-11-17 11:30:22,554 INFO L140 encePairwiseOnDemand]: 64/72 looper letters, 128 selfloop transitions, 15 changer transitions 0/144 dead transitions. [2023-11-17 11:30:22,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 144 transitions, 754 flow [2023-11-17 11:30:22,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 11:30:22,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 11:30:22,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 274 transitions. [2023-11-17 11:30:22,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38055555555555554 [2023-11-17 11:30:22,556 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 274 transitions. [2023-11-17 11:30:22,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 274 transitions. [2023-11-17 11:30:22,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:30:22,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 274 transitions. [2023-11-17 11:30:22,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 27.4) internal successors, (274), 10 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:22,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 72.0) internal successors, (792), 11 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:22,558 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 72.0) internal successors, (792), 11 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:22,558 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 129 flow. Second operand 10 states and 274 transitions. [2023-11-17 11:30:22,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 144 transitions, 754 flow [2023-11-17 11:30:22,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 144 transitions, 754 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:30:22,561 INFO L231 Difference]: Finished difference. Result has 49 places, 37 transitions, 192 flow [2023-11-17 11:30:22,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=192, PETRI_PLACES=49, PETRI_TRANSITIONS=37} [2023-11-17 11:30:22,562 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 19 predicate places. [2023-11-17 11:30:22,562 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 37 transitions, 192 flow [2023-11-17 11:30:22,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.75) internal successors, (177), 12 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:22,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:30:22,562 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:30:22,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 11:30:22,767 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,SelfDestructingSolverStorable6 [2023-11-17 11:30:22,768 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:30:22,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:30:22,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1638090379, now seen corresponding path program 1 times [2023-11-17 11:30:22,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:30:22,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252261246] [2023-11-17 11:30:22,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:30:22,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:30:22,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:30:22,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:30:22,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:30:22,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252261246] [2023-11-17 11:30:22,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252261246] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:30:22,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:30:22,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:30:22,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279498943] [2023-11-17 11:30:22,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:30:22,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:30:22,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:30:22,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:30:22,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:30:22,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 72 [2023-11-17 11:30:22,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 37 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:22,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:30:22,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 72 [2023-11-17 11:30:22,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:30:23,429 INFO L124 PetriNetUnfolderBase]: 6574/9140 cut-off events. [2023-11-17 11:30:23,429 INFO L125 PetriNetUnfolderBase]: For 10420/10420 co-relation queries the response was YES. [2023-11-17 11:30:23,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25829 conditions, 9140 events. 6574/9140 cut-off events. For 10420/10420 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 43774 event pairs, 2550 based on Foata normal form. 0/7535 useless extension candidates. Maximal degree in co-relation 21972. Up to 6172 conditions per place. [2023-11-17 11:30:23,586 INFO L140 encePairwiseOnDemand]: 65/72 looper letters, 63 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2023-11-17 11:30:23,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 76 transitions, 526 flow [2023-11-17 11:30:23,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 11:30:23,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 11:30:23,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2023-11-17 11:30:23,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35 [2023-11-17 11:30:23,587 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 126 transitions. [2023-11-17 11:30:23,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 126 transitions. [2023-11-17 11:30:23,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:30:23,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 126 transitions. [2023-11-17 11:30:23,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:23,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:23,589 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:23,589 INFO L175 Difference]: Start difference. First operand has 49 places, 37 transitions, 192 flow. Second operand 5 states and 126 transitions. [2023-11-17 11:30:23,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 76 transitions, 526 flow [2023-11-17 11:30:23,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 76 transitions, 505 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-17 11:30:23,604 INFO L231 Difference]: Finished difference. Result has 53 places, 43 transitions, 255 flow [2023-11-17 11:30:23,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=255, PETRI_PLACES=53, PETRI_TRANSITIONS=43} [2023-11-17 11:30:23,605 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2023-11-17 11:30:23,605 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 43 transitions, 255 flow [2023-11-17 11:30:23,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:23,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:30:23,605 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:30:23,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 11:30:23,606 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:30:23,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:30:23,606 INFO L85 PathProgramCache]: Analyzing trace with hash -758805309, now seen corresponding path program 1 times [2023-11-17 11:30:23,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:30:23,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510650293] [2023-11-17 11:30:23,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:30:23,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:30:23,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:30:23,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:30:23,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:30:23,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510650293] [2023-11-17 11:30:23,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510650293] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:30:23,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818146575] [2023-11-17 11:30:23,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:30:23,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:30:23,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:30:23,718 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:30:23,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 11:30:23,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:30:23,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 11:30:23,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:30:23,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:30:23,857 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:30:23,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:30:23,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818146575] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:30:23,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:30:23,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-11-17 11:30:23,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674141087] [2023-11-17 11:30:23,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:30:23,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 11:30:23,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:30:23,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 11:30:23,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-17 11:30:23,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 72 [2023-11-17 11:30:23,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 43 transitions, 255 flow. Second operand has 12 states, 12 states have (on average 15.083333333333334) internal successors, (181), 12 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:23,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:30:23,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 72 [2023-11-17 11:30:23,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:30:25,222 INFO L124 PetriNetUnfolderBase]: 9136/12689 cut-off events. [2023-11-17 11:30:25,223 INFO L125 PetriNetUnfolderBase]: For 14186/14186 co-relation queries the response was YES. [2023-11-17 11:30:25,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37286 conditions, 12689 events. 9136/12689 cut-off events. For 14186/14186 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 66253 event pairs, 741 based on Foata normal form. 0/11336 useless extension candidates. Maximal degree in co-relation 32025. Up to 2730 conditions per place. [2023-11-17 11:30:25,282 INFO L140 encePairwiseOnDemand]: 64/72 looper letters, 164 selfloop transitions, 18 changer transitions 0/183 dead transitions. [2023-11-17 11:30:25,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 183 transitions, 1266 flow [2023-11-17 11:30:25,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 11:30:25,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 11:30:25,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 270 transitions. [2023-11-17 11:30:25,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2023-11-17 11:30:25,284 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 270 transitions. [2023-11-17 11:30:25,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 270 transitions. [2023-11-17 11:30:25,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:30:25,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 270 transitions. [2023-11-17 11:30:25,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 27.0) internal successors, (270), 10 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:25,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 72.0) internal successors, (792), 11 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:25,286 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 72.0) internal successors, (792), 11 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:25,286 INFO L175 Difference]: Start difference. First operand has 53 places, 43 transitions, 255 flow. Second operand 10 states and 270 transitions. [2023-11-17 11:30:25,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 183 transitions, 1266 flow [2023-11-17 11:30:25,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 183 transitions, 1260 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:30:25,306 INFO L231 Difference]: Finished difference. Result has 65 places, 47 transitions, 319 flow [2023-11-17 11:30:25,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=319, PETRI_PLACES=65, PETRI_TRANSITIONS=47} [2023-11-17 11:30:25,307 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2023-11-17 11:30:25,307 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 47 transitions, 319 flow [2023-11-17 11:30:25,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.083333333333334) internal successors, (181), 12 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:25,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:30:25,307 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-17 11:30:25,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-17 11:30:25,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:30:25,513 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:30:25,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:30:25,513 INFO L85 PathProgramCache]: Analyzing trace with hash 346719157, now seen corresponding path program 1 times [2023-11-17 11:30:25,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:30:25,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109918320] [2023-11-17 11:30:25,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:30:25,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:30:25,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:30:25,523 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:30:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:30:25,529 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:30:25,530 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:30:25,530 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 11:30:25,530 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 11:30:25,530 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 11:30:25,530 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 11:30:25,530 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 11:30:25,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 11:30:25,530 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-17 11:30:25,531 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:30:25,531 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:30:25,545 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:30:25,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 57 transitions, 142 flow [2023-11-17 11:30:25,551 INFO L124 PetriNetUnfolderBase]: 8/68 cut-off events. [2023-11-17 11:30:25,551 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:30:25,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 68 events. 8/68 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 161 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 64. Up to 5 conditions per place. [2023-11-17 11:30:25,551 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 57 transitions, 142 flow [2023-11-17 11:30:25,552 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 57 transitions, 142 flow [2023-11-17 11:30:25,552 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:30:25,552 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 58 places, 57 transitions, 142 flow [2023-11-17 11:30:25,552 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 58 places, 57 transitions, 142 flow [2023-11-17 11:30:25,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 57 transitions, 142 flow [2023-11-17 11:30:25,556 INFO L124 PetriNetUnfolderBase]: 8/68 cut-off events. [2023-11-17 11:30:25,556 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:30:25,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 68 events. 8/68 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 161 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 64. Up to 5 conditions per place. [2023-11-17 11:30:25,558 INFO L119 LiptonReduction]: Number of co-enabled transitions 2256 [2023-11-17 11:30:26,140 INFO L134 LiptonReduction]: Checked pairs total: 4403 [2023-11-17 11:30:26,141 INFO L136 LiptonReduction]: Total number of compositions: 38 [2023-11-17 11:30:26,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:30:26,142 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@742a9141, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:30:26,142 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 11:30:26,144 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:30:26,144 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2023-11-17 11:30:26,144 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:30:26,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:30:26,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:30:26,144 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:30:26,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:30:26,145 INFO L85 PathProgramCache]: Analyzing trace with hash 886723561, now seen corresponding path program 1 times [2023-11-17 11:30:26,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:30:26,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433523566] [2023-11-17 11:30:26,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:30:26,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:30:26,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:30:26,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:30:26,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:30:26,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433523566] [2023-11-17 11:30:26,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433523566] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:30:26,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:30:26,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:30:26,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411684035] [2023-11-17 11:30:26,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:30:26,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:30:26,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:30:26,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:30:26,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:30:26,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 95 [2023-11-17 11:30:26,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 94 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:26,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:30:26,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 95 [2023-11-17 11:30:26,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:30:28,435 INFO L124 PetriNetUnfolderBase]: 27113/34799 cut-off events. [2023-11-17 11:30:28,435 INFO L125 PetriNetUnfolderBase]: For 3891/3891 co-relation queries the response was YES. [2023-11-17 11:30:28,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71610 conditions, 34799 events. 27113/34799 cut-off events. For 3891/3891 co-relation queries the response was YES. Maximal size of possible extension queue 901. Compared 162041 event pairs, 9812 based on Foata normal form. 0/25208 useless extension candidates. Maximal degree in co-relation 41888. Up to 22105 conditions per place. [2023-11-17 11:30:28,577 INFO L140 encePairwiseOnDemand]: 86/95 looper letters, 71 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2023-11-17 11:30:28,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 83 transitions, 421 flow [2023-11-17 11:30:28,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 11:30:28,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 11:30:28,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 172 transitions. [2023-11-17 11:30:28,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36210526315789476 [2023-11-17 11:30:28,579 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 172 transitions. [2023-11-17 11:30:28,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 172 transitions. [2023-11-17 11:30:28,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:30:28,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 172 transitions. [2023-11-17 11:30:28,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 34.4) internal successors, (172), 5 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:28,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 95.0) internal successors, (570), 6 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:28,580 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 95.0) internal successors, (570), 6 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:28,580 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 94 flow. Second operand 5 states and 172 transitions. [2023-11-17 11:30:28,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 83 transitions, 421 flow [2023-11-17 11:30:28,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 83 transitions, 397 flow, removed 12 selfloop flow, removed 0 redundant places. [2023-11-17 11:30:28,583 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 164 flow [2023-11-17 11:30:28,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=164, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2023-11-17 11:30:28,583 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 6 predicate places. [2023-11-17 11:30:28,583 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 164 flow [2023-11-17 11:30:28,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:28,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:30:28,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:30:28,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 11:30:28,584 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:30:28,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:30:28,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1718627245, now seen corresponding path program 1 times [2023-11-17 11:30:28,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:30:28,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038557874] [2023-11-17 11:30:28,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:30:28,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:30:28,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:30:28,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:30:28,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:30:28,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038557874] [2023-11-17 11:30:28,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038557874] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:30:28,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028917311] [2023-11-17 11:30:28,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:30:28,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:30:28,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:30:28,672 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:30:28,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-17 11:30:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:30:28,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 11:30:28,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:30:28,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:30:28,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:30:28,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:30:28,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028917311] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:30:28,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:30:28,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-11-17 11:30:28,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686551060] [2023-11-17 11:30:28,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:30:28,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 11:30:28,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:30:28,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 11:30:28,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-17 11:30:28,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 95 [2023-11-17 11:30:28,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 164 flow. Second operand has 12 states, 12 states have (on average 18.75) internal successors, (225), 12 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:28,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:30:28,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 95 [2023-11-17 11:30:28,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:30:31,971 INFO L124 PetriNetUnfolderBase]: 37652/48311 cut-off events. [2023-11-17 11:30:31,971 INFO L125 PetriNetUnfolderBase]: For 16490/16490 co-relation queries the response was YES. [2023-11-17 11:30:32,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115666 conditions, 48311 events. 37652/48311 cut-off events. For 16490/16490 co-relation queries the response was YES. Maximal size of possible extension queue 1207. Compared 243407 event pairs, 3824 based on Foata normal form. 0/37415 useless extension candidates. Maximal degree in co-relation 115484. Up to 10728 conditions per place. [2023-11-17 11:30:32,434 INFO L140 encePairwiseOnDemand]: 86/95 looper letters, 181 selfloop transitions, 17 changer transitions 0/199 dead transitions. [2023-11-17 11:30:32,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 199 transitions, 1055 flow [2023-11-17 11:30:32,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 11:30:32,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 11:30:32,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 369 transitions. [2023-11-17 11:30:32,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38842105263157894 [2023-11-17 11:30:32,444 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 369 transitions. [2023-11-17 11:30:32,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 369 transitions. [2023-11-17 11:30:32,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:30:32,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 369 transitions. [2023-11-17 11:30:32,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 36.9) internal successors, (369), 10 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:32,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 95.0) internal successors, (1045), 11 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:32,446 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 95.0) internal successors, (1045), 11 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:32,446 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 164 flow. Second operand 10 states and 369 transitions. [2023-11-17 11:30:32,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 199 transitions, 1055 flow [2023-11-17 11:30:32,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 199 transitions, 1055 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:30:32,455 INFO L231 Difference]: Finished difference. Result has 57 places, 46 transitions, 231 flow [2023-11-17 11:30:32,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=231, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2023-11-17 11:30:32,456 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 19 predicate places. [2023-11-17 11:30:32,456 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 231 flow [2023-11-17 11:30:32,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 18.75) internal successors, (225), 12 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:32,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:30:32,457 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:30:32,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-17 11:30:32,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:30:32,664 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:30:32,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:30:32,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1008107598, now seen corresponding path program 1 times [2023-11-17 11:30:32,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:30:32,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659261671] [2023-11-17 11:30:32,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:30:32,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:30:32,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:30:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:30:32,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:30:32,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659261671] [2023-11-17 11:30:32,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659261671] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:30:32,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:30:32,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:30:32,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186859102] [2023-11-17 11:30:32,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:30:32,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:30:32,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:30:32,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:30:32,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:30:32,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 95 [2023-11-17 11:30:32,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 46 transitions, 231 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:32,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:30:32,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 95 [2023-11-17 11:30:32,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:30:37,465 INFO L124 PetriNetUnfolderBase]: 58132/74560 cut-off events. [2023-11-17 11:30:37,465 INFO L125 PetriNetUnfolderBase]: For 79073/79073 co-relation queries the response was YES. [2023-11-17 11:30:37,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203450 conditions, 74560 events. 58132/74560 cut-off events. For 79073/79073 co-relation queries the response was YES. Maximal size of possible extension queue 1902. Compared 377878 event pairs, 25814 based on Foata normal form. 0/59311 useless extension candidates. Maximal degree in co-relation 173238. Up to 50446 conditions per place. [2023-11-17 11:30:37,875 INFO L140 encePairwiseOnDemand]: 87/95 looper letters, 81 selfloop transitions, 16 changer transitions 0/98 dead transitions. [2023-11-17 11:30:37,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 98 transitions, 665 flow [2023-11-17 11:30:37,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 11:30:37,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 11:30:37,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 166 transitions. [2023-11-17 11:30:37,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3494736842105263 [2023-11-17 11:30:37,876 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 166 transitions. [2023-11-17 11:30:37,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 166 transitions. [2023-11-17 11:30:37,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:30:37,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 166 transitions. [2023-11-17 11:30:37,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:37,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 95.0) internal successors, (570), 6 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:37,877 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 95.0) internal successors, (570), 6 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:37,877 INFO L175 Difference]: Start difference. First operand has 57 places, 46 transitions, 231 flow. Second operand 5 states and 166 transitions. [2023-11-17 11:30:37,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 98 transitions, 665 flow [2023-11-17 11:30:38,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 98 transitions, 640 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-17 11:30:38,065 INFO L231 Difference]: Finished difference. Result has 61 places, 54 transitions, 317 flow [2023-11-17 11:30:38,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=317, PETRI_PLACES=61, PETRI_TRANSITIONS=54} [2023-11-17 11:30:38,065 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 23 predicate places. [2023-11-17 11:30:38,065 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 317 flow [2023-11-17 11:30:38,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:38,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:30:38,065 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:30:38,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-17 11:30:38,066 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:30:38,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:30:38,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1186565370, now seen corresponding path program 1 times [2023-11-17 11:30:38,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:30:38,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852315006] [2023-11-17 11:30:38,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:30:38,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:30:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:30:38,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:30:38,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:30:38,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852315006] [2023-11-17 11:30:38,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852315006] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:30:38,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857662989] [2023-11-17 11:30:38,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:30:38,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:30:38,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:30:38,163 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:30:38,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-17 11:30:38,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:30:38,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 11:30:38,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:30:38,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:30:38,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:30:38,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:30:38,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857662989] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:30:38,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:30:38,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-11-17 11:30:38,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668026209] [2023-11-17 11:30:38,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:30:38,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 11:30:38,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:30:38,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 11:30:38,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-17 11:30:38,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 95 [2023-11-17 11:30:38,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 317 flow. Second operand has 12 states, 12 states have (on average 19.083333333333332) internal successors, (229), 12 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:38,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:30:38,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 95 [2023-11-17 11:30:38,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:30:45,551 INFO L124 PetriNetUnfolderBase]: 82240/105451 cut-off events. [2023-11-17 11:30:45,552 INFO L125 PetriNetUnfolderBase]: For 109552/109552 co-relation queries the response was YES. [2023-11-17 11:30:45,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297521 conditions, 105451 events. 82240/105451 cut-off events. For 109552/109552 co-relation queries the response was YES. Maximal size of possible extension queue 2579. Compared 580836 event pairs, 8753 based on Foata normal form. 0/89206 useless extension candidates. Maximal degree in co-relation 254253. Up to 24360 conditions per place. [2023-11-17 11:30:46,236 INFO L140 encePairwiseOnDemand]: 86/95 looper letters, 217 selfloop transitions, 22 changer transitions 0/240 dead transitions. [2023-11-17 11:30:46,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 240 transitions, 1598 flow [2023-11-17 11:30:46,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 11:30:46,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 11:30:46,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 365 transitions. [2023-11-17 11:30:46,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38421052631578945 [2023-11-17 11:30:46,238 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 365 transitions. [2023-11-17 11:30:46,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 365 transitions. [2023-11-17 11:30:46,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:30:46,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 365 transitions. [2023-11-17 11:30:46,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 36.5) internal successors, (365), 10 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:46,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 95.0) internal successors, (1045), 11 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:46,242 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 95.0) internal successors, (1045), 11 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:46,242 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 317 flow. Second operand 10 states and 365 transitions. [2023-11-17 11:30:46,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 240 transitions, 1598 flow [2023-11-17 11:30:46,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 240 transitions, 1590 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:30:46,842 INFO L231 Difference]: Finished difference. Result has 73 places, 58 transitions, 387 flow [2023-11-17 11:30:46,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=387, PETRI_PLACES=73, PETRI_TRANSITIONS=58} [2023-11-17 11:30:46,843 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 35 predicate places. [2023-11-17 11:30:46,843 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 58 transitions, 387 flow [2023-11-17 11:30:46,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.083333333333332) internal successors, (229), 12 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:46,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:30:46,843 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:30:46,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-17 11:30:47,048 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 [2023-11-17 11:30:47,048 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:30:47,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:30:47,049 INFO L85 PathProgramCache]: Analyzing trace with hash -968370669, now seen corresponding path program 1 times [2023-11-17 11:30:47,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:30:47,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856136463] [2023-11-17 11:30:47,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:30:47,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:30:47,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:30:47,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:30:47,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:30:47,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856136463] [2023-11-17 11:30:47,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856136463] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:30:47,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:30:47,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:30:47,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589559781] [2023-11-17 11:30:47,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:30:47,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:30:47,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:30:47,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:30:47,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:30:47,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 95 [2023-11-17 11:30:47,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 58 transitions, 387 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:47,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:30:47,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 95 [2023-11-17 11:30:47,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:30:50,832 INFO L124 PetriNetUnfolderBase]: 43500/56821 cut-off events. [2023-11-17 11:30:50,833 INFO L125 PetriNetUnfolderBase]: For 88892/88892 co-relation queries the response was YES. [2023-11-17 11:30:50,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178221 conditions, 56821 events. 43500/56821 cut-off events. For 88892/88892 co-relation queries the response was YES. Maximal size of possible extension queue 1530. Compared 303698 event pairs, 15625 based on Foata normal form. 3168/50341 useless extension candidates. Maximal degree in co-relation 121912. Up to 30272 conditions per place. [2023-11-17 11:30:51,150 INFO L140 encePairwiseOnDemand]: 87/95 looper letters, 64 selfloop transitions, 10 changer transitions 0/75 dead transitions. [2023-11-17 11:30:51,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 75 transitions, 564 flow [2023-11-17 11:30:51,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:30:51,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:30:51,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2023-11-17 11:30:51,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36140350877192984 [2023-11-17 11:30:51,151 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 103 transitions. [2023-11-17 11:30:51,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 103 transitions. [2023-11-17 11:30:51,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:30:51,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 103 transitions. [2023-11-17 11:30:51,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:51,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:51,152 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:51,152 INFO L175 Difference]: Start difference. First operand has 73 places, 58 transitions, 387 flow. Second operand 3 states and 103 transitions. [2023-11-17 11:30:51,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 75 transitions, 564 flow [2023-11-17 11:30:52,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 75 transitions, 526 flow, removed 9 selfloop flow, removed 6 redundant places. [2023-11-17 11:30:52,003 INFO L231 Difference]: Finished difference. Result has 69 places, 48 transitions, 262 flow [2023-11-17 11:30:52,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=69, PETRI_TRANSITIONS=48} [2023-11-17 11:30:52,003 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 31 predicate places. [2023-11-17 11:30:52,003 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 48 transitions, 262 flow [2023-11-17 11:30:52,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:52,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:30:52,004 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:30:52,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-17 11:30:52,004 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:30:52,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:30:52,004 INFO L85 PathProgramCache]: Analyzing trace with hash -2057636125, now seen corresponding path program 1 times [2023-11-17 11:30:52,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:30:52,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780341091] [2023-11-17 11:30:52,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:30:52,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:30:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:30:52,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 11:30:52,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:30:52,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780341091] [2023-11-17 11:30:52,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780341091] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:30:52,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:30:52,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:30:52,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009324323] [2023-11-17 11:30:52,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:30:52,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:30:52,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:30:52,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:30:52,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:30:52,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 95 [2023-11-17 11:30:52,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 48 transitions, 262 flow. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:52,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:30:52,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 95 [2023-11-17 11:30:52,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:30:56,868 INFO L124 PetriNetUnfolderBase]: 55988/72907 cut-off events. [2023-11-17 11:30:56,869 INFO L125 PetriNetUnfolderBase]: For 101106/101106 co-relation queries the response was YES. [2023-11-17 11:30:57,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227127 conditions, 72907 events. 55988/72907 cut-off events. For 101106/101106 co-relation queries the response was YES. Maximal size of possible extension queue 1978. Compared 385080 event pairs, 31134 based on Foata normal form. 0/60283 useless extension candidates. Maximal degree in co-relation 153319. Up to 58506 conditions per place. [2023-11-17 11:30:57,487 INFO L140 encePairwiseOnDemand]: 87/95 looper letters, 80 selfloop transitions, 7 changer transitions 0/88 dead transitions. [2023-11-17 11:30:57,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 88 transitions, 627 flow [2023-11-17 11:30:57,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 11:30:57,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 11:30:57,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2023-11-17 11:30:57,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33052631578947367 [2023-11-17 11:30:57,489 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 157 transitions. [2023-11-17 11:30:57,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 157 transitions. [2023-11-17 11:30:57,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:30:57,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 157 transitions. [2023-11-17 11:30:57,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:57,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 95.0) internal successors, (570), 6 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:57,491 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 95.0) internal successors, (570), 6 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:57,491 INFO L175 Difference]: Start difference. First operand has 69 places, 48 transitions, 262 flow. Second operand 5 states and 157 transitions. [2023-11-17 11:30:57,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 88 transitions, 627 flow [2023-11-17 11:30:58,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 88 transitions, 608 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:30:58,001 INFO L231 Difference]: Finished difference. Result has 74 places, 50 transitions, 284 flow [2023-11-17 11:30:58,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=284, PETRI_PLACES=74, PETRI_TRANSITIONS=50} [2023-11-17 11:30:58,001 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 36 predicate places. [2023-11-17 11:30:58,001 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 50 transitions, 284 flow [2023-11-17 11:30:58,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:58,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:30:58,001 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:30:58,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-17 11:30:58,002 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:30:58,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:30:58,002 INFO L85 PathProgramCache]: Analyzing trace with hash 47796298, now seen corresponding path program 1 times [2023-11-17 11:30:58,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:30:58,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266304501] [2023-11-17 11:30:58,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:30:58,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:30:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:30:58,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:30:58,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:30:58,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266304501] [2023-11-17 11:30:58,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266304501] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:30:58,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:30:58,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 11:30:58,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843043880] [2023-11-17 11:30:58,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:30:58,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 11:30:58,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:30:58,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 11:30:58,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-17 11:30:58,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 95 [2023-11-17 11:30:58,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 50 transitions, 284 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:30:58,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:30:58,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 95 [2023-11-17 11:30:58,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:31:02,513 INFO L124 PetriNetUnfolderBase]: 50592/65945 cut-off events. [2023-11-17 11:31:02,514 INFO L125 PetriNetUnfolderBase]: For 93685/93685 co-relation queries the response was YES. [2023-11-17 11:31:02,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209172 conditions, 65945 events. 50592/65945 cut-off events. For 93685/93685 co-relation queries the response was YES. Maximal size of possible extension queue 1757. Compared 349771 event pairs, 18555 based on Foata normal form. 1566/60095 useless extension candidates. Maximal degree in co-relation 156644. Up to 37752 conditions per place. [2023-11-17 11:31:02,938 INFO L140 encePairwiseOnDemand]: 87/95 looper letters, 95 selfloop transitions, 10 changer transitions 0/106 dead transitions. [2023-11-17 11:31:02,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 106 transitions, 749 flow [2023-11-17 11:31:02,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 11:31:02,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 11:31:02,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2023-11-17 11:31:02,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3067669172932331 [2023-11-17 11:31:02,940 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 204 transitions. [2023-11-17 11:31:02,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 204 transitions. [2023-11-17 11:31:02,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:31:02,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 204 transitions. [2023-11-17 11:31:02,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 29.142857142857142) internal successors, (204), 7 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:31:02,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 95.0) internal successors, (760), 8 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:31:02,941 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 95.0) internal successors, (760), 8 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:31:02,941 INFO L175 Difference]: Start difference. First operand has 74 places, 50 transitions, 284 flow. Second operand 7 states and 204 transitions. [2023-11-17 11:31:02,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 106 transitions, 749 flow [2023-11-17 11:31:03,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 106 transitions, 734 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-17 11:31:03,967 INFO L231 Difference]: Finished difference. Result has 75 places, 49 transitions, 283 flow [2023-11-17 11:31:03,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=283, PETRI_PLACES=75, PETRI_TRANSITIONS=49} [2023-11-17 11:31:03,968 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 37 predicate places. [2023-11-17 11:31:03,968 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 49 transitions, 283 flow [2023-11-17 11:31:03,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:31:03,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:31:03,968 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:31:03,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-17 11:31:03,968 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:31:03,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:31:03,969 INFO L85 PathProgramCache]: Analyzing trace with hash 2122395629, now seen corresponding path program 1 times [2023-11-17 11:31:03,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:31:03,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612265424] [2023-11-17 11:31:03,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:31:03,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:31:03,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:31:04,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:31:04,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:31:04,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612265424] [2023-11-17 11:31:04,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612265424] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:31:04,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:31:04,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 11:31:04,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987268638] [2023-11-17 11:31:04,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:31:04,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 11:31:04,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:31:04,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 11:31:04,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-17 11:31:04,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 95 [2023-11-17 11:31:04,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 49 transitions, 283 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:31:04,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:31:04,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 95 [2023-11-17 11:31:04,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:31:07,530 INFO L124 PetriNetUnfolderBase]: 45670/59589 cut-off events. [2023-11-17 11:31:07,530 INFO L125 PetriNetUnfolderBase]: For 75662/75662 co-relation queries the response was YES. [2023-11-17 11:31:07,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186345 conditions, 59589 events. 45670/59589 cut-off events. For 75662/75662 co-relation queries the response was YES. Maximal size of possible extension queue 1553. Compared 312321 event pairs, 15480 based on Foata normal form. 1434/54306 useless extension candidates. Maximal degree in co-relation 186114. Up to 34175 conditions per place. [2023-11-17 11:31:08,081 INFO L140 encePairwiseOnDemand]: 87/95 looper letters, 104 selfloop transitions, 10 changer transitions 0/115 dead transitions. [2023-11-17 11:31:08,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 115 transitions, 800 flow [2023-11-17 11:31:08,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 11:31:08,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 11:31:08,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 215 transitions. [2023-11-17 11:31:08,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3233082706766917 [2023-11-17 11:31:08,083 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 215 transitions. [2023-11-17 11:31:08,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 215 transitions. [2023-11-17 11:31:08,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:31:08,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 215 transitions. [2023-11-17 11:31:08,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 30.714285714285715) internal successors, (215), 7 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:31:08,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 95.0) internal successors, (760), 8 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:31:08,085 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 95.0) internal successors, (760), 8 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:31:08,085 INFO L175 Difference]: Start difference. First operand has 75 places, 49 transitions, 283 flow. Second operand 7 states and 215 transitions. [2023-11-17 11:31:08,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 115 transitions, 800 flow [2023-11-17 11:31:09,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 115 transitions, 751 flow, removed 4 selfloop flow, removed 9 redundant places. [2023-11-17 11:31:09,153 INFO L231 Difference]: Finished difference. Result has 71 places, 48 transitions, 266 flow [2023-11-17 11:31:09,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=266, PETRI_PLACES=71, PETRI_TRANSITIONS=48} [2023-11-17 11:31:09,153 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 33 predicate places. [2023-11-17 11:31:09,153 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 48 transitions, 266 flow [2023-11-17 11:31:09,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:31:09,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:31:09,154 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:31:09,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-17 11:31:09,154 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:31:09,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:31:09,154 INFO L85 PathProgramCache]: Analyzing trace with hash 637790530, now seen corresponding path program 1 times [2023-11-17 11:31:09,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:31:09,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005819436] [2023-11-17 11:31:09,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:31:09,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:31:09,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:31:09,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 11:31:09,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:31:09,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005819436] [2023-11-17 11:31:09,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005819436] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:31:09,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360112782] [2023-11-17 11:31:09,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:31:09,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:31:09,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:31:09,250 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) [2023-11-17 11:31:09,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-17 11:31:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:31:09,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 11:31:09,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:31:09,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 11:31:09,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:31:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 11:31:09,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360112782] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:31:09,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:31:09,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-11-17 11:31:09,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923780935] [2023-11-17 11:31:09,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:31:09,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 11:31:09,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:31:09,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 11:31:09,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-17 11:31:09,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 95 [2023-11-17 11:31:09,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 48 transitions, 266 flow. Second operand has 12 states, 12 states have (on average 19.25) internal successors, (231), 12 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:31:09,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:31:09,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 95 [2023-11-17 11:31:09,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand