/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/14_spin2003-pthread.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:07:16,599 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:07:16,681 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 15:07:16,701 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:07:16,702 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:07:16,703 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:07:16,703 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:07:16,703 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:07:16,704 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:07:16,704 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:07:16,704 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:07:16,705 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:07:16,705 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:07:16,705 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:07:16,706 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:07:16,706 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:07:16,706 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:07:16,707 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:07:16,707 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:07:16,707 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:07:16,707 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:07:16,711 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:07:16,711 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:07:16,712 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:07:16,712 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:07:16,712 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:07:16,713 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:07:16,713 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:07:16,713 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:07:16,713 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:07:16,714 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:07:16,714 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:07:16,714 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:07:16,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:07:16,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:07:16,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:07:16,966 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:07:16,966 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:07:16,968 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/14_spin2003-pthread.i [2023-11-17 15:07:18,179 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:07:18,434 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:07:18,434 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/14_spin2003-pthread.i [2023-11-17 15:07:18,446 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36ce756fa/c60ed38d9ecc4f0398c78991f92af953/FLAG3daa429ba [2023-11-17 15:07:18,458 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36ce756fa/c60ed38d9ecc4f0398c78991f92af953 [2023-11-17 15:07:18,460 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:07:18,462 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:07:18,464 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:07:18,464 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:07:18,468 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:07:18,469 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:07:18" (1/1) ... [2023-11-17 15:07:18,470 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2576da4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:18, skipping insertion in model container [2023-11-17 15:07:18,470 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:07:18" (1/1) ... [2023-11-17 15:07:18,503 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:07:18,828 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-ext/14_spin2003-pthread.i[30427,30440] [2023-11-17 15:07:18,837 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:07:18,850 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:07:18,880 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-ext/14_spin2003-pthread.i[30427,30440] [2023-11-17 15:07:18,883 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:07:18,907 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:07:18,907 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:18 WrapperNode [2023-11-17 15:07:18,907 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:07:18,908 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:07:18,908 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:07:18,909 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:07:18,914 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:18" (1/1) ... [2023-11-17 15:07:18,924 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:18" (1/1) ... [2023-11-17 15:07:18,940 INFO L138 Inliner]: procedures = 162, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 29 [2023-11-17 15:07:18,941 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:07:18,942 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:07:18,942 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:07:18,942 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:07:18,949 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:18" (1/1) ... [2023-11-17 15:07:18,949 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:18" (1/1) ... [2023-11-17 15:07:18,952 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:18" (1/1) ... [2023-11-17 15:07:18,952 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:18" (1/1) ... [2023-11-17 15:07:18,956 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:18" (1/1) ... [2023-11-17 15:07:18,959 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:18" (1/1) ... [2023-11-17 15:07:18,960 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:18" (1/1) ... [2023-11-17 15:07:18,961 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:18" (1/1) ... [2023-11-17 15:07:18,963 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:07:18,964 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:07:18,964 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:07:18,964 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:07:18,965 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:18" (1/1) ... [2023-11-17 15:07:18,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:07:18,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:07:19,006 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 15:07:19,012 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 15:07:19,033 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 15:07:19,033 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 15:07:19,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:07:19,033 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 15:07:19,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:07:19,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:07:19,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:07:19,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:07:19,034 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 15:07:19,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:07:19,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:07:19,035 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 15:07:19,135 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:07:19,138 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:07:19,245 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:07:19,262 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:07:19,262 INFO L307 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-17 15:07:19,264 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:07:19 BoogieIcfgContainer [2023-11-17 15:07:19,264 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:07:19,266 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:07:19,266 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:07:19,269 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:07:19,269 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:07:18" (1/3) ... [2023-11-17 15:07:19,270 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11551c6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:07:19, skipping insertion in model container [2023-11-17 15:07:19,270 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:07:18" (2/3) ... [2023-11-17 15:07:19,270 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11551c6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:07:19, skipping insertion in model container [2023-11-17 15:07:19,271 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:07:19" (3/3) ... [2023-11-17 15:07:19,272 INFO L112 eAbstractionObserver]: Analyzing ICFG 14_spin2003-pthread.i [2023-11-17 15:07:19,288 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:07:19,289 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:07:19,289 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:07:19,353 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:07:19,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 46 transitions, 96 flow [2023-11-17 15:07:19,407 INFO L124 PetriNetUnfolderBase]: 3/57 cut-off events. [2023-11-17 15:07:19,408 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:07:19,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 57 events. 3/57 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 68 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 28. Up to 4 conditions per place. [2023-11-17 15:07:19,413 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 46 transitions, 96 flow [2023-11-17 15:07:19,416 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 46 transitions, 96 flow [2023-11-17 15:07:19,420 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:07:19,432 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 47 places, 46 transitions, 96 flow [2023-11-17 15:07:19,435 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 47 places, 46 transitions, 96 flow [2023-11-17 15:07:19,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 46 transitions, 96 flow [2023-11-17 15:07:19,449 INFO L124 PetriNetUnfolderBase]: 3/57 cut-off events. [2023-11-17 15:07:19,449 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:07:19,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 57 events. 3/57 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 68 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 28. Up to 4 conditions per place. [2023-11-17 15:07:19,451 INFO L119 LiptonReduction]: Number of co-enabled transitions 392 [2023-11-17 15:07:20,751 INFO L134 LiptonReduction]: Checked pairs total: 330 [2023-11-17 15:07:20,751 INFO L136 LiptonReduction]: Total number of compositions: 48 [2023-11-17 15:07:20,767 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:07:20,773 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;@692caff5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:07:20,774 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 15:07:20,776 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:07:20,776 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 15:07:20,776 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:07:20,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:20,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:07:20,778 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:07:20,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:20,783 INFO L85 PathProgramCache]: Analyzing trace with hash 6353497, now seen corresponding path program 1 times [2023-11-17 15:07:20,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:20,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574874732] [2023-11-17 15:07:20,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:20,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:20,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:07:20,947 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 15:07:20,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:07:20,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574874732] [2023-11-17 15:07:20,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574874732] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:07:20,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:07:20,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:07:20,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454880363] [2023-11-17 15:07:20,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:07:20,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:07:20,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:07:20,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:07:20,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:07:20,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 94 [2023-11-17 15:07:20,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 20 flow. Second operand has 2 states, 2 states have (on average 41.0) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 15:07:20,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:07:20,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 94 [2023-11-17 15:07:20,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:07:21,022 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-11-17 15:07:21,022 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:07:21,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 2 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2023-11-17 15:07:21,025 INFO L140 encePairwiseOnDemand]: 92/94 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2023-11-17 15:07:21,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 26 flow [2023-11-17 15:07:21,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 15:07:21,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 15:07:21,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 85 transitions. [2023-11-17 15:07:21,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4521276595744681 [2023-11-17 15:07:21,038 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 85 transitions. [2023-11-17 15:07:21,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 85 transitions. [2023-11-17 15:07:21,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:07:21,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 85 transitions. [2023-11-17 15:07:21,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 42.5) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 15:07:21,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 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 15:07:21,052 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 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 15:07:21,054 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 20 flow. Second operand 2 states and 85 transitions. [2023-11-17 15:07:21,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 26 flow [2023-11-17 15:07:21,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 26 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:07:21,058 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 16 flow [2023-11-17 15:07:21,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=16, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=16, PETRI_PLACES=10, PETRI_TRANSITIONS=6} [2023-11-17 15:07:21,063 INFO L281 CegarLoopForPetriNet]: 11 programPoint places, -1 predicate places. [2023-11-17 15:07:21,063 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 16 flow [2023-11-17 15:07:21,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 41.0) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 15:07:21,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:21,064 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:07:21,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:07:21,064 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:07:21,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:21,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1810724353, now seen corresponding path program 1 times [2023-11-17 15:07:21,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:21,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570606716] [2023-11-17 15:07:21,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:21,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:21,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:07:21,096 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:07:21,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:07:21,125 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:07:21,126 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:07:21,128 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 15:07:21,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 15:07:21,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 15:07:21,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:07:21,130 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:07:21,133 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:07:21,133 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:07:21,152 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:07:21,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 61 transitions, 132 flow [2023-11-17 15:07:21,183 INFO L124 PetriNetUnfolderBase]: 5/85 cut-off events. [2023-11-17 15:07:21,184 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:07:21,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 85 events. 5/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 136 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 58. Up to 6 conditions per place. [2023-11-17 15:07:21,186 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 61 transitions, 132 flow [2023-11-17 15:07:21,188 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 61 transitions, 132 flow [2023-11-17 15:07:21,188 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:07:21,188 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 63 places, 61 transitions, 132 flow [2023-11-17 15:07:21,189 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 63 places, 61 transitions, 132 flow [2023-11-17 15:07:21,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 61 transitions, 132 flow [2023-11-17 15:07:21,212 INFO L124 PetriNetUnfolderBase]: 5/85 cut-off events. [2023-11-17 15:07:21,212 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:07:21,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 85 events. 5/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 136 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 58. Up to 6 conditions per place. [2023-11-17 15:07:21,214 INFO L119 LiptonReduction]: Number of co-enabled transitions 1204 [2023-11-17 15:07:22,363 INFO L134 LiptonReduction]: Checked pairs total: 3129 [2023-11-17 15:07:22,364 INFO L136 LiptonReduction]: Total number of compositions: 54 [2023-11-17 15:07:22,366 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:07:22,367 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;@692caff5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:07:22,367 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 15:07:22,369 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:07:22,370 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-11-17 15:07:22,370 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:07:22,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:22,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:07:22,370 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:07:22,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:22,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1830609667, now seen corresponding path program 1 times [2023-11-17 15:07:22,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:22,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019080348] [2023-11-17 15:07:22,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:22,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:22,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:07:22,462 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 15:07:22,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:07:22,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019080348] [2023-11-17 15:07:22,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019080348] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:07:22,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:07:22,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:07:22,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909411144] [2023-11-17 15:07:22,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:07:22,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:07:22,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:07:22,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:07:22,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:07:22,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 115 [2023-11-17 15:07:22,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 15:07:22,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:07:22,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 115 [2023-11-17 15:07:22,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:07:22,545 INFO L124 PetriNetUnfolderBase]: 117/242 cut-off events. [2023-11-17 15:07:22,545 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:07:22,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 497 conditions, 242 events. 117/242 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1115 event pairs, 76 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 190. Up to 174 conditions per place. [2023-11-17 15:07:22,548 INFO L140 encePairwiseOnDemand]: 105/115 looper letters, 23 selfloop transitions, 5 changer transitions 0/31 dead transitions. [2023-11-17 15:07:22,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 31 transitions, 133 flow [2023-11-17 15:07:22,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:07:22,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:07:22,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 156 transitions. [2023-11-17 15:07:22,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45217391304347826 [2023-11-17 15:07:22,556 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 156 transitions. [2023-11-17 15:07:22,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 156 transitions. [2023-11-17 15:07:22,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:07:22,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 156 transitions. [2023-11-17 15:07:22,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 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 15:07:22,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 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 15:07:22,562 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 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 15:07:22,562 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 54 flow. Second operand 3 states and 156 transitions. [2023-11-17 15:07:22,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 31 transitions, 133 flow [2023-11-17 15:07:22,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 31 transitions, 133 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:07:22,564 INFO L231 Difference]: Finished difference. Result has 28 places, 23 transitions, 88 flow [2023-11-17 15:07:22,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=28, PETRI_TRANSITIONS=23} [2023-11-17 15:07:22,565 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-11-17 15:07:22,565 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 23 transitions, 88 flow [2023-11-17 15:07:22,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 15:07:22,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:22,565 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:07:22,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:07:22,566 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:07:22,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:22,566 INFO L85 PathProgramCache]: Analyzing trace with hash -150392663, now seen corresponding path program 1 times [2023-11-17 15:07:22,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:22,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282668913] [2023-11-17 15:07:22,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:22,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:07:22,602 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:07:22,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:07:22,615 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:07:22,616 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:07:22,616 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 15:07:22,616 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 15:07:22,616 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 15:07:22,617 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 15:07:22,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:07:22,617 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:07:22,618 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:07:22,618 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:07:22,629 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:07:22,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 76 transitions, 170 flow [2023-11-17 15:07:22,641 INFO L124 PetriNetUnfolderBase]: 7/113 cut-off events. [2023-11-17 15:07:22,642 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:07:22,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 113 events. 7/113 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 206 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 89. Up to 8 conditions per place. [2023-11-17 15:07:22,643 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 76 transitions, 170 flow [2023-11-17 15:07:22,644 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 76 transitions, 170 flow [2023-11-17 15:07:22,644 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:07:22,644 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 76 transitions, 170 flow [2023-11-17 15:07:22,644 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 76 transitions, 170 flow [2023-11-17 15:07:22,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 76 transitions, 170 flow [2023-11-17 15:07:22,653 INFO L124 PetriNetUnfolderBase]: 7/113 cut-off events. [2023-11-17 15:07:22,654 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:07:22,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 113 events. 7/113 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 206 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 89. Up to 8 conditions per place. [2023-11-17 15:07:22,656 INFO L119 LiptonReduction]: Number of co-enabled transitions 2436 [2023-11-17 15:07:23,895 INFO L134 LiptonReduction]: Checked pairs total: 8191 [2023-11-17 15:07:23,895 INFO L136 LiptonReduction]: Total number of compositions: 62 [2023-11-17 15:07:23,897 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:07:23,898 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;@692caff5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:07:23,898 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 15:07:23,900 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:07:23,900 INFO L124 PetriNetUnfolderBase]: 1/15 cut-off events. [2023-11-17 15:07:23,900 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:07:23,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:23,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:07:23,901 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:07:23,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:23,901 INFO L85 PathProgramCache]: Analyzing trace with hash -627534483, now seen corresponding path program 1 times [2023-11-17 15:07:23,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:23,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668742969] [2023-11-17 15:07:23,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:23,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:07:23,936 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 15:07:23,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:07:23,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668742969] [2023-11-17 15:07:23,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668742969] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:07:23,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:07:23,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:07:23,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746882627] [2023-11-17 15:07:23,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:07:23,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:07:23,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:07:23,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:07:23,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:07:23,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 138 [2023-11-17 15:07:23,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 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 15:07:23,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:07:23,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 138 [2023-11-17 15:07:23,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:07:24,150 INFO L124 PetriNetUnfolderBase]: 1667/2686 cut-off events. [2023-11-17 15:07:24,150 INFO L125 PetriNetUnfolderBase]: For 376/376 co-relation queries the response was YES. [2023-11-17 15:07:24,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5520 conditions, 2686 events. 1667/2686 cut-off events. For 376/376 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 16200 event pairs, 996 based on Foata normal form. 0/2568 useless extension candidates. Maximal degree in co-relation 774. Up to 1800 conditions per place. [2023-11-17 15:07:24,172 INFO L140 encePairwiseOnDemand]: 125/138 looper letters, 34 selfloop transitions, 7 changer transitions 0/44 dead transitions. [2023-11-17 15:07:24,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 44 transitions, 200 flow [2023-11-17 15:07:24,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:07:24,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:07:24,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 188 transitions. [2023-11-17 15:07:24,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45410628019323673 [2023-11-17 15:07:24,174 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 188 transitions. [2023-11-17 15:07:24,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 188 transitions. [2023-11-17 15:07:24,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:07:24,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 188 transitions. [2023-11-17 15:07:24,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 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 15:07:24,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 0 states have call successors, (0), 0 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 15:07:24,177 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 0 states have call successors, (0), 0 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 15:07:24,177 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 76 flow. Second operand 3 states and 188 transitions. [2023-11-17 15:07:24,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 44 transitions, 200 flow [2023-11-17 15:07:24,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 44 transitions, 196 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-17 15:07:24,179 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 126 flow [2023-11-17 15:07:24,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-11-17 15:07:24,180 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-11-17 15:07:24,181 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 126 flow [2023-11-17 15:07:24,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 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 15:07:24,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:24,181 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:07:24,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:07:24,181 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:07:24,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:24,182 INFO L85 PathProgramCache]: Analyzing trace with hash -2125428848, now seen corresponding path program 1 times [2023-11-17 15:07:24,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:24,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931641358] [2023-11-17 15:07:24,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:24,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:24,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:07:24,292 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 15:07:24,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:07:24,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931641358] [2023-11-17 15:07:24,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931641358] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:07:24,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:07:24,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:07:24,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997174505] [2023-11-17 15:07:24,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:07:24,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:07:24,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:07:24,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:07:24,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:07:24,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 138 [2023-11-17 15:07:24,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 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 15:07:24,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:07:24,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 138 [2023-11-17 15:07:24,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:07:24,345 INFO L124 PetriNetUnfolderBase]: 65/249 cut-off events. [2023-11-17 15:07:24,345 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-11-17 15:07:24,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 592 conditions, 249 events. 65/249 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1251 event pairs, 27 based on Foata normal form. 54/298 useless extension candidates. Maximal degree in co-relation 340. Up to 100 conditions per place. [2023-11-17 15:07:24,347 INFO L140 encePairwiseOnDemand]: 132/138 looper letters, 11 selfloop transitions, 6 changer transitions 0/26 dead transitions. [2023-11-17 15:07:24,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 26 transitions, 140 flow [2023-11-17 15:07:24,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:07:24,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:07:24,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 179 transitions. [2023-11-17 15:07:24,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4323671497584541 [2023-11-17 15:07:24,349 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 179 transitions. [2023-11-17 15:07:24,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 179 transitions. [2023-11-17 15:07:24,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:07:24,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 179 transitions. [2023-11-17 15:07:24,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 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 15:07:24,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 0 states have call successors, (0), 0 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 15:07:24,353 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 0 states have call successors, (0), 0 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 15:07:24,353 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 126 flow. Second operand 3 states and 179 transitions. [2023-11-17 15:07:24,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 26 transitions, 140 flow [2023-11-17 15:07:24,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 112 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 15:07:24,357 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 74 flow [2023-11-17 15:07:24,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2023-11-17 15:07:24,361 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -2 predicate places. [2023-11-17 15:07:24,361 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 74 flow [2023-11-17 15:07:24,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 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 15:07:24,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:24,362 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:07:24,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:07:24,362 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:07:24,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:24,363 INFO L85 PathProgramCache]: Analyzing trace with hash -666604477, now seen corresponding path program 1 times [2023-11-17 15:07:24,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:24,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869720166] [2023-11-17 15:07:24,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:24,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:24,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:07:24,390 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:07:24,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:07:24,404 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:07:24,417 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:07:24,417 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 15:07:24,417 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 15:07:24,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 15:07:24,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 15:07:24,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 15:07:24,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 15:07:24,418 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:07:24,419 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:07:24,419 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:07:24,439 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:07:24,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 91 transitions, 210 flow [2023-11-17 15:07:24,464 INFO L124 PetriNetUnfolderBase]: 9/141 cut-off events. [2023-11-17 15:07:24,464 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:07:24,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 141 events. 9/141 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 269 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 121. Up to 10 conditions per place. [2023-11-17 15:07:24,466 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 91 transitions, 210 flow [2023-11-17 15:07:24,467 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 91 transitions, 210 flow [2023-11-17 15:07:24,467 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:07:24,468 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 91 transitions, 210 flow [2023-11-17 15:07:24,468 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 91 transitions, 210 flow [2023-11-17 15:07:24,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 91 transitions, 210 flow [2023-11-17 15:07:24,495 INFO L124 PetriNetUnfolderBase]: 9/141 cut-off events. [2023-11-17 15:07:24,496 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:07:24,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 141 events. 9/141 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 269 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 121. Up to 10 conditions per place. [2023-11-17 15:07:24,499 INFO L119 LiptonReduction]: Number of co-enabled transitions 4088 [2023-11-17 15:07:25,914 INFO L134 LiptonReduction]: Checked pairs total: 11984 [2023-11-17 15:07:25,914 INFO L136 LiptonReduction]: Total number of compositions: 77 [2023-11-17 15:07:25,916 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:07:25,917 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;@692caff5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:07:25,917 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 15:07:25,919 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:07:25,919 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-11-17 15:07:25,919 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:07:25,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:25,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:07:25,919 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:07:25,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:25,920 INFO L85 PathProgramCache]: Analyzing trace with hash -405632646, now seen corresponding path program 1 times [2023-11-17 15:07:25,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:25,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328459199] [2023-11-17 15:07:25,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:25,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:25,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:07:25,943 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 15:07:25,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:07:25,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328459199] [2023-11-17 15:07:25,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328459199] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:07:25,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:07:25,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:07:25,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301360964] [2023-11-17 15:07:25,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:07:25,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:07:25,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:07:25,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:07:25,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:07:25,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 168 [2023-11-17 15:07:25,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 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 15:07:25,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:07:25,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 168 [2023-11-17 15:07:25,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:07:28,158 INFO L124 PetriNetUnfolderBase]: 18951/27046 cut-off events. [2023-11-17 15:07:28,159 INFO L125 PetriNetUnfolderBase]: For 5489/5489 co-relation queries the response was YES. [2023-11-17 15:07:28,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55767 conditions, 27046 events. 18951/27046 cut-off events. For 5489/5489 co-relation queries the response was YES. Maximal size of possible extension queue 1525. Compared 182594 event pairs, 10888 based on Foata normal form. 0/25662 useless extension candidates. Maximal degree in co-relation 5572. Up to 17008 conditions per place. [2023-11-17 15:07:28,385 INFO L140 encePairwiseOnDemand]: 151/168 looper letters, 45 selfloop transitions, 9 changer transitions 0/57 dead transitions. [2023-11-17 15:07:28,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 57 transitions, 271 flow [2023-11-17 15:07:28,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:07:28,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:07:28,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2023-11-17 15:07:28,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2023-11-17 15:07:28,387 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2023-11-17 15:07:28,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2023-11-17 15:07:28,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:07:28,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2023-11-17 15:07:28,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 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 15:07:28,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 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 15:07:28,390 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 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 15:07:28,390 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 102 flow. Second operand 3 states and 222 transitions. [2023-11-17 15:07:28,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 57 transitions, 271 flow [2023-11-17 15:07:28,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 57 transitions, 259 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-17 15:07:28,398 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 164 flow [2023-11-17 15:07:28,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2023-11-17 15:07:28,400 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2023-11-17 15:07:28,400 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 164 flow [2023-11-17 15:07:28,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 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 15:07:28,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:28,401 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:07:28,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 15:07:28,401 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:07:28,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:28,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1195172180, now seen corresponding path program 1 times [2023-11-17 15:07:28,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:28,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692787569] [2023-11-17 15:07:28,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:28,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:07:28,482 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 15:07:28,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:07:28,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692787569] [2023-11-17 15:07:28,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692787569] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:07:28,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:07:28,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:07:28,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433857553] [2023-11-17 15:07:28,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:07:28,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:07:28,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:07:28,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:07:28,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:07:28,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 168 [2023-11-17 15:07:28,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 15:07:28,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:07:28,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 168 [2023-11-17 15:07:28,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:07:28,567 INFO L124 PetriNetUnfolderBase]: 215/707 cut-off events. [2023-11-17 15:07:28,567 INFO L125 PetriNetUnfolderBase]: For 276/276 co-relation queries the response was YES. [2023-11-17 15:07:28,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1728 conditions, 707 events. 215/707 cut-off events. For 276/276 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 4662 event pairs, 83 based on Foata normal form. 248/930 useless extension candidates. Maximal degree in co-relation 1050. Up to 328 conditions per place. [2023-11-17 15:07:28,572 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 14 selfloop transitions, 8 changer transitions 0/33 dead transitions. [2023-11-17 15:07:28,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 33 transitions, 183 flow [2023-11-17 15:07:28,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:07:28,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:07:28,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2023-11-17 15:07:28,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42658730158730157 [2023-11-17 15:07:28,574 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2023-11-17 15:07:28,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2023-11-17 15:07:28,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:07:28,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2023-11-17 15:07:28,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:28,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 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 15:07:28,580 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 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 15:07:28,580 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 164 flow. Second operand 3 states and 215 transitions. [2023-11-17 15:07:28,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 33 transitions, 183 flow [2023-11-17 15:07:28,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 33 transitions, 147 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 15:07:28,585 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 96 flow [2023-11-17 15:07:28,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2023-11-17 15:07:28,586 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -3 predicate places. [2023-11-17 15:07:28,587 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 96 flow [2023-11-17 15:07:28,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 15:07:28,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:28,587 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 15:07:28,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 15:07:28,587 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:07:28,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:28,588 INFO L85 PathProgramCache]: Analyzing trace with hash -728738168, now seen corresponding path program 1 times [2023-11-17 15:07:28,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:28,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865592816] [2023-11-17 15:07:28,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:28,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:28,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:07:28,604 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:07:28,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:07:28,628 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:07:28,628 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:07:28,629 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 15:07:28,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 15:07:28,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-17 15:07:28,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 15:07:28,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 15:07:28,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 15:07:28,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 15:07:28,632 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:07:28,633 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:07:28,633 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 15:07:28,651 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:07:28,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 106 transitions, 252 flow [2023-11-17 15:07:28,670 INFO L124 PetriNetUnfolderBase]: 11/169 cut-off events. [2023-11-17 15:07:28,671 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 15:07:28,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 169 events. 11/169 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 342 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 154. Up to 12 conditions per place. [2023-11-17 15:07:28,672 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 106 transitions, 252 flow [2023-11-17 15:07:28,676 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 106 transitions, 252 flow [2023-11-17 15:07:28,676 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:07:28,676 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 111 places, 106 transitions, 252 flow [2023-11-17 15:07:28,677 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 111 places, 106 transitions, 252 flow [2023-11-17 15:07:28,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 106 transitions, 252 flow [2023-11-17 15:07:28,691 INFO L124 PetriNetUnfolderBase]: 11/169 cut-off events. [2023-11-17 15:07:28,692 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 15:07:28,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 169 events. 11/169 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 342 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 154. Up to 12 conditions per place. [2023-11-17 15:07:28,697 INFO L119 LiptonReduction]: Number of co-enabled transitions 6160 [2023-11-17 15:07:30,398 INFO L134 LiptonReduction]: Checked pairs total: 23321 [2023-11-17 15:07:30,400 INFO L136 LiptonReduction]: Total number of compositions: 90 [2023-11-17 15:07:30,405 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:07:30,406 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;@692caff5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:07:30,406 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 15:07:30,407 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:07:30,408 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-11-17 15:07:30,408 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:07:30,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:30,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:07:30,408 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 15:07:30,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:30,409 INFO L85 PathProgramCache]: Analyzing trace with hash -358566100, now seen corresponding path program 1 times [2023-11-17 15:07:30,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:30,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188944292] [2023-11-17 15:07:30,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:30,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:07:30,437 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 15:07:30,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:07:30,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188944292] [2023-11-17 15:07:30,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188944292] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:07:30,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:07:30,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:07:30,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178002162] [2023-11-17 15:07:30,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:07:30,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:07:30,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:07:30,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:07:30,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:07:30,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 196 [2023-11-17 15:07:30,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 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 15:07:30,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:07:30,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 196 [2023-11-17 15:07:30,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:07:46,480 INFO L124 PetriNetUnfolderBase]: 189321/251344 cut-off events. [2023-11-17 15:07:46,480 INFO L125 PetriNetUnfolderBase]: For 67150/67150 co-relation queries the response was YES. [2023-11-17 15:07:46,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519724 conditions, 251344 events. 189321/251344 cut-off events. For 67150/67150 co-relation queries the response was YES. Maximal size of possible extension queue 10541. Compared 1798835 event pairs, 106256 based on Foata normal form. 0/236979 useless extension candidates. Maximal degree in co-relation 56232. Up to 150074 conditions per place. [2023-11-17 15:07:48,139 INFO L140 encePairwiseOnDemand]: 175/196 looper letters, 56 selfloop transitions, 11 changer transitions 0/70 dead transitions. [2023-11-17 15:07:48,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 70 transitions, 346 flow [2023-11-17 15:07:48,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:07:48,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:07:48,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 256 transitions. [2023-11-17 15:07:48,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2023-11-17 15:07:48,141 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 256 transitions. [2023-11-17 15:07:48,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 256 transitions. [2023-11-17 15:07:48,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:07:48,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 256 transitions. [2023-11-17 15:07:48,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 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 15:07:48,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 0 states have call successors, (0), 0 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 15:07:48,145 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 0 states have call successors, (0), 0 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 15:07:48,145 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 130 flow. Second operand 3 states and 256 transitions. [2023-11-17 15:07:48,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 70 transitions, 346 flow [2023-11-17 15:07:48,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 70 transitions, 322 flow, removed 12 selfloop flow, removed 0 redundant places. [2023-11-17 15:07:48,286 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 202 flow [2023-11-17 15:07:48,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2023-11-17 15:07:48,286 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2023-11-17 15:07:48,287 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 202 flow [2023-11-17 15:07:48,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 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 15:07:48,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:48,287 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:07:48,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 15:07:48,287 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 15:07:48,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:48,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1280930815, now seen corresponding path program 1 times [2023-11-17 15:07:48,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:48,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509165113] [2023-11-17 15:07:48,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:48,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:07:48,341 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 15:07:48,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:07:48,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509165113] [2023-11-17 15:07:48,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509165113] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:07:48,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:07:48,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:07:48,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790959494] [2023-11-17 15:07:48,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:07:48,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:07:48,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:07:48,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:07:48,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:07:48,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 196 [2023-11-17 15:07:48,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 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 15:07:48,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:07:48,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 196 [2023-11-17 15:07:48,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:07:48,464 INFO L124 PetriNetUnfolderBase]: 537/1773 cut-off events. [2023-11-17 15:07:48,465 INFO L125 PetriNetUnfolderBase]: For 727/727 co-relation queries the response was YES. [2023-11-17 15:07:48,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4274 conditions, 1773 events. 537/1773 cut-off events. For 727/727 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 14319 event pairs, 227 based on Foata normal form. 790/2514 useless extension candidates. Maximal degree in co-relation 2492. Up to 764 conditions per place. [2023-11-17 15:07:48,471 INFO L140 encePairwiseOnDemand]: 186/196 looper letters, 16 selfloop transitions, 10 changer transitions 0/40 dead transitions. [2023-11-17 15:07:48,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 40 transitions, 224 flow [2023-11-17 15:07:48,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:07:48,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:07:48,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 250 transitions. [2023-11-17 15:07:48,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2023-11-17 15:07:48,478 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 250 transitions. [2023-11-17 15:07:48,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 250 transitions. [2023-11-17 15:07:48,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:07:48,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 250 transitions. [2023-11-17 15:07:48,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 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 15:07:48,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 0 states have call successors, (0), 0 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 15:07:48,482 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 0 states have call successors, (0), 0 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 15:07:48,483 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 202 flow. Second operand 3 states and 250 transitions. [2023-11-17 15:07:48,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 40 transitions, 224 flow [2023-11-17 15:07:48,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 40 transitions, 180 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 15:07:48,490 INFO L231 Difference]: Finished difference. Result has 48 places, 35 transitions, 118 flow [2023-11-17 15:07:48,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=48, PETRI_TRANSITIONS=35} [2023-11-17 15:07:48,492 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -4 predicate places. [2023-11-17 15:07:48,492 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 35 transitions, 118 flow [2023-11-17 15:07:48,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 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 15:07:48,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:48,493 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:07:48,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-17 15:07:48,493 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 15:07:48,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:48,493 INFO L85 PathProgramCache]: Analyzing trace with hash 2128285998, now seen corresponding path program 1 times [2023-11-17 15:07:48,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:48,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191283961] [2023-11-17 15:07:48,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:48,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:48,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:07:48,511 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:07:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:07:48,531 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:07:48,531 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:07:48,531 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-17 15:07:48,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-17 15:07:48,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-11-17 15:07:48,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-17 15:07:48,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-17 15:07:48,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-17 15:07:48,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-17 15:07:48,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-17 15:07:48,532 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:07:48,533 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:07:48,533 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-11-17 15:07:48,556 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:07:48,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 121 transitions, 296 flow [2023-11-17 15:07:48,574 INFO L124 PetriNetUnfolderBase]: 13/197 cut-off events. [2023-11-17 15:07:48,575 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-17 15:07:48,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 197 events. 13/197 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 402 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 188. Up to 14 conditions per place. [2023-11-17 15:07:48,577 INFO L82 GeneralOperation]: Start removeDead. Operand has 127 places, 121 transitions, 296 flow [2023-11-17 15:07:48,578 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 121 transitions, 296 flow [2023-11-17 15:07:48,578 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:07:48,578 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 127 places, 121 transitions, 296 flow [2023-11-17 15:07:48,579 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 127 places, 121 transitions, 296 flow [2023-11-17 15:07:48,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 121 transitions, 296 flow [2023-11-17 15:07:48,592 INFO L124 PetriNetUnfolderBase]: 13/197 cut-off events. [2023-11-17 15:07:48,593 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-17 15:07:48,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 197 events. 13/197 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 402 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 188. Up to 14 conditions per place. [2023-11-17 15:07:48,600 INFO L119 LiptonReduction]: Number of co-enabled transitions 8652 [2023-11-17 15:07:50,380 INFO L134 LiptonReduction]: Checked pairs total: 35818 [2023-11-17 15:07:50,380 INFO L136 LiptonReduction]: Total number of compositions: 109 [2023-11-17 15:07:50,382 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:07:50,382 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;@692caff5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:07:50,382 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-17 15:07:50,384 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:07:50,384 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-11-17 15:07:50,384 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:07:50,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:50,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:07:50,384 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-17 15:07:50,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:50,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1599414286, now seen corresponding path program 1 times [2023-11-17 15:07:50,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:50,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784165334] [2023-11-17 15:07:50,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:50,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:50,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:07:50,423 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 15:07:50,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:07:50,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784165334] [2023-11-17 15:07:50,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784165334] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:07:50,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:07:50,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:07:50,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231200948] [2023-11-17 15:07:50,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:07:50,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:07:50,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:07:50,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:07:50,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:07:50,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 230 [2023-11-17 15:07:50,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 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 15:07:50,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:07:50,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 230 [2023-11-17 15:07:50,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand