/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-complex/safestack_relacy.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:21:20,610 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:21:20,666 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 15:21:20,696 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:21:20,697 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:21:20,697 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:21:20,698 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:21:20,698 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:21:20,698 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:21:20,701 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:21:20,701 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:21:20,702 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:21:20,702 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:21:20,703 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:21:20,703 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:21:20,703 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:21:20,703 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:21:20,703 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:21:20,704 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:21:20,704 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:21:20,704 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:21:20,705 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:21:20,705 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:21:20,705 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:21:20,705 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:21:20,706 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:21:20,706 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:21:20,707 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:21:20,707 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:21:20,707 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:21:20,708 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:21:20,708 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:21:20,708 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:21:20,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:21:20,890 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:21:20,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:21:20,893 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:21:20,893 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:21:20,895 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2023-11-17 15:21:21,951 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:21:22,215 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:21:22,216 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2023-11-17 15:21:22,241 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49f5f319a/fc455b1532454c9483d3c8a475b95a44/FLAGba6690522 [2023-11-17 15:21:22,256 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49f5f319a/fc455b1532454c9483d3c8a475b95a44 [2023-11-17 15:21:22,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:21:22,259 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:21:22,261 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:21:22,262 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:21:22,265 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:21:22,265 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:21:22" (1/1) ... [2023-11-17 15:21:22,266 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c13db4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:21:22, skipping insertion in model container [2023-11-17 15:21:22,266 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:21:22" (1/1) ... [2023-11-17 15:21:22,312 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:21:22,778 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i[78860,78873] [2023-11-17 15:21:22,787 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:21:22,800 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:21:22,851 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i[78860,78873] [2023-11-17 15:21:22,852 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:21:22,965 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:21:22,965 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:21:22,970 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:21:22,970 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:21:22 WrapperNode [2023-11-17 15:21:22,970 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:21:22,971 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:21:22,971 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:21:22,971 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:21:22,976 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:21:22" (1/1) ... [2023-11-17 15:21:23,006 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:21:22" (1/1) ... [2023-11-17 15:21:23,035 INFO L138 Inliner]: procedures = 481, calls = 74, calls flagged for inlining = 19, calls inlined = 19, statements flattened = 285 [2023-11-17 15:21:23,035 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:21:23,036 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:21:23,036 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:21:23,036 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:21:23,042 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:21:22" (1/1) ... [2023-11-17 15:21:23,042 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:21:22" (1/1) ... [2023-11-17 15:21:23,045 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:21:22" (1/1) ... [2023-11-17 15:21:23,046 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:21:22" (1/1) ... [2023-11-17 15:21:23,065 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:21:22" (1/1) ... [2023-11-17 15:21:23,068 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:21:22" (1/1) ... [2023-11-17 15:21:23,070 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:21:22" (1/1) ... [2023-11-17 15:21:23,072 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:21:22" (1/1) ... [2023-11-17 15:21:23,075 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:21:23,076 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:21:23,076 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:21:23,076 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:21:23,077 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:21:22" (1/1) ... [2023-11-17 15:21:23,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:21:23,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:21:23,102 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 15:21:23,104 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 15:21:23,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 15:21:23,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:21:23,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 15:21:23,131 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:21:23,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:21:23,131 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2023-11-17 15:21:23,131 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2023-11-17 15:21:23,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:21:23,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:21:23,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:21:23,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:21:23,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:21:23,133 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 15:21:23,317 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:21:23,318 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:21:23,620 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:21:23,701 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:21:23,701 INFO L307 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-17 15:21:23,703 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:21:23 BoogieIcfgContainer [2023-11-17 15:21:23,703 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:21:23,705 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:21:23,705 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:21:23,707 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:21:23,708 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:21:22" (1/3) ... [2023-11-17 15:21:23,708 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a76271e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:21:23, skipping insertion in model container [2023-11-17 15:21:23,708 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:21:22" (2/3) ... [2023-11-17 15:21:23,708 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a76271e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:21:23, skipping insertion in model container [2023-11-17 15:21:23,709 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:21:23" (3/3) ... [2023-11-17 15:21:23,709 INFO L112 eAbstractionObserver]: Analyzing ICFG safestack_relacy.i [2023-11-17 15:21:23,721 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:21:23,721 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:21:23,721 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:21:23,822 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 15:21:23,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 267 places, 281 transitions, 569 flow [2023-11-17 15:21:23,978 INFO L124 PetriNetUnfolderBase]: 19/296 cut-off events. [2023-11-17 15:21:23,978 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:21:23,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301 conditions, 296 events. 19/296 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 472 event pairs, 0 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 208. Up to 4 conditions per place. [2023-11-17 15:21:23,987 INFO L82 GeneralOperation]: Start removeDead. Operand has 267 places, 281 transitions, 569 flow [2023-11-17 15:21:23,992 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 263 places, 276 transitions, 556 flow [2023-11-17 15:21:23,995 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:21:24,005 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 263 places, 276 transitions, 556 flow [2023-11-17 15:21:24,007 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 263 places, 276 transitions, 556 flow [2023-11-17 15:21:24,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 263 places, 276 transitions, 556 flow [2023-11-17 15:21:24,033 INFO L124 PetriNetUnfolderBase]: 18/291 cut-off events. [2023-11-17 15:21:24,033 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:21:24,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295 conditions, 291 events. 18/291 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 432 event pairs, 0 based on Foata normal form. 0/268 useless extension candidates. Maximal degree in co-relation 208. Up to 4 conditions per place. [2023-11-17 15:21:24,040 INFO L119 LiptonReduction]: Number of co-enabled transitions 7896 [2023-11-17 15:21:30,089 INFO L134 LiptonReduction]: Checked pairs total: 7766 [2023-11-17 15:21:30,089 INFO L136 LiptonReduction]: Total number of compositions: 276 [2023-11-17 15:21:30,100 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:21:30,104 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;@1962a76a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:21:30,104 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 15:21:30,106 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:21:30,106 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-11-17 15:21:30,106 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:21:30,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:21:30,107 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-17 15:21:30,107 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:21:30,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:21:30,111 INFO L85 PathProgramCache]: Analyzing trace with hash 436269607, now seen corresponding path program 1 times [2023-11-17 15:21:30,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:21:30,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973145149] [2023-11-17 15:21:30,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:21:30,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:21:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:21:30,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:21:30,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:21:30,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973145149] [2023-11-17 15:21:30,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973145149] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:21:30,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:21:30,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:21:30,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769895970] [2023-11-17 15:21:30,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:21:30,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:21:30,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:21:30,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:21:30,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:21:30,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 557 [2023-11-17 15:21:30,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 37 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 0 states have call successors, (0), 0 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 15:21:30,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:21:30,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 557 [2023-11-17 15:21:30,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:21:30,622 INFO L124 PetriNetUnfolderBase]: 82/168 cut-off events. [2023-11-17 15:21:30,622 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:21:30,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340 conditions, 168 events. 82/168 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 454 event pairs, 57 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 320. Up to 167 conditions per place. [2023-11-17 15:21:30,624 INFO L140 encePairwiseOnDemand]: 550/557 looper letters, 31 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2023-11-17 15:21:30,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 34 transitions, 138 flow [2023-11-17 15:21:30,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:21:30,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:21:30,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 776 transitions. [2023-11-17 15:21:30,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46439257929383604 [2023-11-17 15:21:30,642 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 776 transitions. [2023-11-17 15:21:30,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 776 transitions. [2023-11-17 15:21:30,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:21:30,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 776 transitions. [2023-11-17 15:21:30,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 258.6666666666667) internal successors, (776), 3 states have internal predecessors, (776), 0 states have call successors, (0), 0 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 15:21:30,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 557.0) internal successors, (2228), 4 states have internal predecessors, (2228), 0 states have call successors, (0), 0 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 15:21:30,669 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 557.0) internal successors, (2228), 4 states have internal predecessors, (2228), 0 states have call successors, (0), 0 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 15:21:30,670 INFO L175 Difference]: Start difference. First operand has 30 places, 37 transitions, 78 flow. Second operand 3 states and 776 transitions. [2023-11-17 15:21:30,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 34 transitions, 138 flow [2023-11-17 15:21:30,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 34 transitions, 138 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:21:30,690 INFO L231 Difference]: Finished difference. Result has 32 places, 34 transitions, 82 flow [2023-11-17 15:21:30,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=32, PETRI_TRANSITIONS=34} [2023-11-17 15:21:30,696 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-11-17 15:21:30,697 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 34 transitions, 82 flow [2023-11-17 15:21:30,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 247.66666666666666) internal successors, (743), 3 states have internal predecessors, (743), 0 states have call successors, (0), 0 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 15:21:30,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:21:30,697 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-17 15:21:30,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:21:30,698 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:21:30,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:21:30,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1271731103, now seen corresponding path program 1 times [2023-11-17 15:21:30,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:21:30,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420729128] [2023-11-17 15:21:30,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:21:30,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:21:30,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:21:30,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:21:30,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:21:30,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420729128] [2023-11-17 15:21:30,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420729128] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:21:30,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432349204] [2023-11-17 15:21:30,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:21:30,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:21:30,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:21:30,858 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:21:30,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 15:21:30,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:21:30,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-17 15:21:30,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:21:30,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:21:30,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:21:31,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:21:31,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432349204] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:21:31,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:21:31,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-17 15:21:31,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891519496] [2023-11-17 15:21:31,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:21:31,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 15:21:31,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:21:31,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 15:21:31,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-17 15:21:31,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 557 [2023-11-17 15:21:31,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 34 transitions, 82 flow. Second operand has 8 states, 8 states have (on average 247.5) internal successors, (1980), 8 states have internal predecessors, (1980), 0 states have call successors, (0), 0 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 15:21:31,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:21:31,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 557 [2023-11-17 15:21:31,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:21:31,111 INFO L124 PetriNetUnfolderBase]: 82/169 cut-off events. [2023-11-17 15:21:31,112 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:21:31,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350 conditions, 169 events. 82/169 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 454 event pairs, 57 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 338. Up to 167 conditions per place. [2023-11-17 15:21:31,112 INFO L140 encePairwiseOnDemand]: 554/557 looper letters, 31 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2023-11-17 15:21:31,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 35 transitions, 154 flow [2023-11-17 15:21:31,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 15:21:31,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 15:21:31,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1019 transitions. [2023-11-17 15:21:31,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573608617594255 [2023-11-17 15:21:31,115 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1019 transitions. [2023-11-17 15:21:31,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1019 transitions. [2023-11-17 15:21:31,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:21:31,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1019 transitions. [2023-11-17 15:21:31,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 254.75) internal successors, (1019), 4 states have internal predecessors, (1019), 0 states have call successors, (0), 0 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 15:21:31,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 557.0) internal successors, (2785), 5 states have internal predecessors, (2785), 0 states have call successors, (0), 0 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 15:21:31,120 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 557.0) internal successors, (2785), 5 states have internal predecessors, (2785), 0 states have call successors, (0), 0 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 15:21:31,121 INFO L175 Difference]: Start difference. First operand has 32 places, 34 transitions, 82 flow. Second operand 4 states and 1019 transitions. [2023-11-17 15:21:31,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 35 transitions, 154 flow [2023-11-17 15:21:31,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 35 transitions, 150 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 15:21:31,122 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 94 flow [2023-11-17 15:21:31,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=557, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=35, PETRI_TRANSITIONS=35} [2023-11-17 15:21:31,122 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-11-17 15:21:31,122 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 94 flow [2023-11-17 15:21:31,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 247.5) internal successors, (1980), 8 states have internal predecessors, (1980), 0 states have call successors, (0), 0 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 15:21:31,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:21:31,124 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-11-17 15:21:31,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 15:21:31,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:21:31,330 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:21:31,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:21:31,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1401233703, now seen corresponding path program 2 times [2023-11-17 15:21:31,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:21:31,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563142473] [2023-11-17 15:21:31,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:21:31,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:21:31,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:21:31,357 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:21:31,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:21:31,406 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:21:31,407 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:21:31,407 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 15:21:31,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 15:21:31,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 15:21:31,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:21:31,410 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-11-17 15:21:31,412 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:21:31,412 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:21:31,460 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 15:21:31,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 446 places, 471 transitions, 958 flow [2023-11-17 15:21:31,546 INFO L124 PetriNetUnfolderBase]: 36/524 cut-off events. [2023-11-17 15:21:31,547 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:21:31,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 536 conditions, 524 events. 36/524 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1671 event pairs, 0 based on Foata normal form. 0/482 useless extension candidates. Maximal degree in co-relation 410. Up to 8 conditions per place. [2023-11-17 15:21:31,552 INFO L82 GeneralOperation]: Start removeDead. Operand has 446 places, 471 transitions, 958 flow [2023-11-17 15:21:31,555 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 446 places, 471 transitions, 958 flow [2023-11-17 15:21:31,555 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:21:31,555 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 446 places, 471 transitions, 958 flow [2023-11-17 15:21:31,556 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 446 places, 471 transitions, 958 flow [2023-11-17 15:21:31,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 446 places, 471 transitions, 958 flow [2023-11-17 15:21:31,615 INFO L124 PetriNetUnfolderBase]: 36/524 cut-off events. [2023-11-17 15:21:31,616 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:21:31,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 536 conditions, 524 events. 36/524 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1671 event pairs, 0 based on Foata normal form. 0/482 useless extension candidates. Maximal degree in co-relation 410. Up to 8 conditions per place. [2023-11-17 15:21:31,643 INFO L119 LiptonReduction]: Number of co-enabled transitions 90616 [2023-11-17 15:21:41,045 INFO L134 LiptonReduction]: Checked pairs total: 92686 [2023-11-17 15:21:41,045 INFO L136 LiptonReduction]: Total number of compositions: 457 [2023-11-17 15:21:41,047 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:21:41,048 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;@1962a76a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:21:41,048 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 15:21:41,050 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:21:41,050 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-11-17 15:21:41,050 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:21:41,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:21:41,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:21:41,050 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:21:41,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:21:41,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1431728264, now seen corresponding path program 1 times [2023-11-17 15:21:41,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:21:41,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223423915] [2023-11-17 15:21:41,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:21:41,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:21:41,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:21:41,103 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 15:21:41,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:21:41,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223423915] [2023-11-17 15:21:41,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223423915] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:21:41,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:21:41,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:21:41,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888168267] [2023-11-17 15:21:41,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:21:41,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:21:41,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:21:41,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:21:41,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:21:41,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 420 out of 928 [2023-11-17 15:21:41,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 81 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 422.6666666666667) internal successors, (1268), 3 states have internal predecessors, (1268), 0 states have call successors, (0), 0 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 15:21:41,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:21:41,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 420 of 928 [2023-11-17 15:21:41,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:21:42,034 INFO L124 PetriNetUnfolderBase]: 8734/12805 cut-off events. [2023-11-17 15:21:42,034 INFO L125 PetriNetUnfolderBase]: For 210/210 co-relation queries the response was YES. [2023-11-17 15:21:42,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25705 conditions, 12805 events. 8734/12805 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 69151 event pairs, 6840 based on Foata normal form. 0/9299 useless extension candidates. Maximal degree in co-relation 20786. Up to 12767 conditions per place. [2023-11-17 15:21:42,081 INFO L140 encePairwiseOnDemand]: 920/928 looper letters, 72 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2023-11-17 15:21:42,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 77 transitions, 318 flow [2023-11-17 15:21:42,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:21:42,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:21:42,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1340 transitions. [2023-11-17 15:21:42,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4813218390804598 [2023-11-17 15:21:42,084 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1340 transitions. [2023-11-17 15:21:42,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1340 transitions. [2023-11-17 15:21:42,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:21:42,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1340 transitions. [2023-11-17 15:21:42,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 446.6666666666667) internal successors, (1340), 3 states have internal predecessors, (1340), 0 states have call successors, (0), 0 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 15:21:42,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 928.0) internal successors, (3712), 4 states have internal predecessors, (3712), 0 states have call successors, (0), 0 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 15:21:42,091 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 928.0) internal successors, (3712), 4 states have internal predecessors, (3712), 0 states have call successors, (0), 0 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 15:21:42,091 INFO L175 Difference]: Start difference. First operand has 66 places, 81 transitions, 178 flow. Second operand 3 states and 1340 transitions. [2023-11-17 15:21:42,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 77 transitions, 318 flow [2023-11-17 15:21:42,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 77 transitions, 318 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:21:42,095 INFO L231 Difference]: Finished difference. Result has 69 places, 77 transitions, 180 flow [2023-11-17 15:21:42,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=928, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=69, PETRI_TRANSITIONS=77} [2023-11-17 15:21:42,097 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2023-11-17 15:21:42,097 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 77 transitions, 180 flow [2023-11-17 15:21:42,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 422.6666666666667) internal successors, (1268), 3 states have internal predecessors, (1268), 0 states have call successors, (0), 0 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 15:21:42,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:21:42,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:21:42,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:21:42,098 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:21:42,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:21:42,098 INFO L85 PathProgramCache]: Analyzing trace with hash 629832193, now seen corresponding path program 1 times [2023-11-17 15:21:42,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:21:42,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374408314] [2023-11-17 15:21:42,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:21:42,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:21:42,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:21:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:21:42,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:21:42,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374408314] [2023-11-17 15:21:42,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374408314] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:21:42,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:21:42,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:21:42,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190203082] [2023-11-17 15:21:42,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:21:42,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:21:42,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:21:42,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:21:42,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:21:42,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 428 out of 928 [2023-11-17 15:21:42,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 77 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 431.6666666666667) internal successors, (1295), 3 states have internal predecessors, (1295), 0 states have call successors, (0), 0 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 15:21:42,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:21:42,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 428 of 928 [2023-11-17 15:21:42,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:21:43,145 INFO L124 PetriNetUnfolderBase]: 9047/13267 cut-off events. [2023-11-17 15:21:43,145 INFO L125 PetriNetUnfolderBase]: For 220/220 co-relation queries the response was YES. [2023-11-17 15:21:43,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26648 conditions, 13267 events. 9047/13267 cut-off events. For 220/220 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 69069 event pairs, 6840 based on Foata normal form. 0/9667 useless extension candidates. Maximal degree in co-relation 26635. Up to 12768 conditions per place. [2023-11-17 15:21:43,198 INFO L140 encePairwiseOnDemand]: 925/928 looper letters, 111 selfloop transitions, 2 changer transitions 0/116 dead transitions. [2023-11-17 15:21:43,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 116 transitions, 492 flow [2023-11-17 15:21:43,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:21:43,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:21:43,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1397 transitions. [2023-11-17 15:21:43,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017959770114943 [2023-11-17 15:21:43,201 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1397 transitions. [2023-11-17 15:21:43,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1397 transitions. [2023-11-17 15:21:43,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:21:43,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1397 transitions. [2023-11-17 15:21:43,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 465.6666666666667) internal successors, (1397), 3 states have internal predecessors, (1397), 0 states have call successors, (0), 0 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 15:21:43,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 928.0) internal successors, (3712), 4 states have internal predecessors, (3712), 0 states have call successors, (0), 0 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 15:21:43,210 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 928.0) internal successors, (3712), 4 states have internal predecessors, (3712), 0 states have call successors, (0), 0 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 15:21:43,210 INFO L175 Difference]: Start difference. First operand has 69 places, 77 transitions, 180 flow. Second operand 3 states and 1397 transitions. [2023-11-17 15:21:43,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 116 transitions, 492 flow [2023-11-17 15:21:43,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 116 transitions, 488 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 15:21:43,214 INFO L231 Difference]: Finished difference. Result has 71 places, 78 transitions, 188 flow [2023-11-17 15:21:43,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=928, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=71, PETRI_TRANSITIONS=78} [2023-11-17 15:21:43,215 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 5 predicate places. [2023-11-17 15:21:43,215 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 78 transitions, 188 flow [2023-11-17 15:21:43,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 431.6666666666667) internal successors, (1295), 3 states have internal predecessors, (1295), 0 states have call successors, (0), 0 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 15:21:43,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:21:43,216 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-17 15:21:43,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:21:43,217 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:21:43,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:21:43,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1262072726, now seen corresponding path program 1 times [2023-11-17 15:21:43,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:21:43,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463647505] [2023-11-17 15:21:43,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:21:43,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:21:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:21:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-17 15:21:43,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:21:43,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463647505] [2023-11-17 15:21:43,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463647505] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:21:43,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155932938] [2023-11-17 15:21:43,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:21:43,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:21:43,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:21:43,340 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:21:43,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 15:21:43,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:21:43,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-17 15:21:43,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:21:43,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-17 15:21:43,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:21:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-17 15:21:43,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155932938] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:21:43,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:21:43,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-17 15:21:43,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759807989] [2023-11-17 15:21:43,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:21:43,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 15:21:43,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:21:43,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 15:21:43,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-17 15:21:43,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 420 out of 928 [2023-11-17 15:21:43,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 78 transitions, 188 flow. Second operand has 8 states, 8 states have (on average 421.625) internal successors, (3373), 8 states have internal predecessors, (3373), 0 states have call successors, (0), 0 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 15:21:43,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:21:43,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 420 of 928 [2023-11-17 15:21:43,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:21:44,582 INFO L124 PetriNetUnfolderBase]: 9047/13269 cut-off events. [2023-11-17 15:21:44,582 INFO L125 PetriNetUnfolderBase]: For 888/888 co-relation queries the response was YES. [2023-11-17 15:21:44,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27436 conditions, 13269 events. 9047/13269 cut-off events. For 888/888 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 68801 event pairs, 7116 based on Foata normal form. 0/9826 useless extension candidates. Maximal degree in co-relation 27415. Up to 13237 conditions per place. [2023-11-17 15:21:44,622 INFO L140 encePairwiseOnDemand]: 925/928 looper letters, 73 selfloop transitions, 3 changer transitions 0/79 dead transitions. [2023-11-17 15:21:44,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 79 transitions, 344 flow [2023-11-17 15:21:44,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 15:21:44,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 15:21:44,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1756 transitions. [2023-11-17 15:21:44,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4730603448275862 [2023-11-17 15:21:44,625 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1756 transitions. [2023-11-17 15:21:44,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1756 transitions. [2023-11-17 15:21:44,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:21:44,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1756 transitions. [2023-11-17 15:21:44,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 439.0) internal successors, (1756), 4 states have internal predecessors, (1756), 0 states have call successors, (0), 0 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 15:21:44,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 928.0) internal successors, (4640), 5 states have internal predecessors, (4640), 0 states have call successors, (0), 0 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 15:21:44,634 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 928.0) internal successors, (4640), 5 states have internal predecessors, (4640), 0 states have call successors, (0), 0 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 15:21:44,634 INFO L175 Difference]: Start difference. First operand has 71 places, 78 transitions, 188 flow. Second operand 4 states and 1756 transitions. [2023-11-17 15:21:44,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 79 transitions, 344 flow [2023-11-17 15:21:44,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 79 transitions, 342 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:21:44,641 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 202 flow [2023-11-17 15:21:44,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=928, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2023-11-17 15:21:44,644 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 8 predicate places. [2023-11-17 15:21:44,644 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 202 flow [2023-11-17 15:21:44,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 421.625) internal successors, (3373), 8 states have internal predecessors, (3373), 0 states have call successors, (0), 0 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 15:21:44,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:21:44,647 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-17 15:21:44,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 15:21:44,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-17 15:21:44,855 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:21:44,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:21:44,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1499082434, now seen corresponding path program 2 times [2023-11-17 15:21:44,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:21:44,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767699107] [2023-11-17 15:21:44,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:21:44,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:21:44,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:21:44,879 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:21:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:21:44,903 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:21:44,904 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:21:44,904 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 15:21:44,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 15:21:44,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 15:21:44,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 15:21:44,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 15:21:44,904 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2023-11-17 15:21:44,905 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:21:44,905 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:21:44,959 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 15:21:44,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 625 places, 661 transitions, 1349 flow [2023-11-17 15:21:45,084 INFO L124 PetriNetUnfolderBase]: 58/781 cut-off events. [2023-11-17 15:21:45,085 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:21:45,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 806 conditions, 781 events. 58/781 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3371 event pairs, 1 based on Foata normal form. 0/716 useless extension candidates. Maximal degree in co-relation 628. Up to 16 conditions per place. [2023-11-17 15:21:45,098 INFO L82 GeneralOperation]: Start removeDead. Operand has 625 places, 661 transitions, 1349 flow [2023-11-17 15:21:45,129 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 625 places, 661 transitions, 1349 flow [2023-11-17 15:21:45,129 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:21:45,129 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 625 places, 661 transitions, 1349 flow [2023-11-17 15:21:45,130 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 625 places, 661 transitions, 1349 flow [2023-11-17 15:21:45,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 625 places, 661 transitions, 1349 flow [2023-11-17 15:21:45,252 INFO L124 PetriNetUnfolderBase]: 58/781 cut-off events. [2023-11-17 15:21:45,253 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:21:45,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 806 conditions, 781 events. 58/781 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3371 event pairs, 1 based on Foata normal form. 0/716 useless extension candidates. Maximal degree in co-relation 628. Up to 16 conditions per place. [2023-11-17 15:21:45,309 INFO L119 LiptonReduction]: Number of co-enabled transitions 243648 [2023-11-17 15:21:57,188 INFO L134 LiptonReduction]: Checked pairs total: 239051 [2023-11-17 15:21:57,188 INFO L136 LiptonReduction]: Total number of compositions: 642 [2023-11-17 15:21:57,189 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:21:57,190 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;@1962a76a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:21:57,190 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 15:21:57,194 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:21:57,194 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-11-17 15:21:57,194 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:21:57,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:21:57,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:21:57,194 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:21:57,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:21:57,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1073939847, now seen corresponding path program 1 times [2023-11-17 15:21:57,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:21:57,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814203160] [2023-11-17 15:21:57,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:21:57,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:21:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:21:57,252 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 15:21:57,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:21:57,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814203160] [2023-11-17 15:21:57,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814203160] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:21:57,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:21:57,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:21:57,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254084233] [2023-11-17 15:21:57,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:21:57,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:21:57,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:21:57,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:21:57,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:21:57,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 594 out of 1303 [2023-11-17 15:21:57,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 116 transitions, 259 flow. Second operand has 3 states, 3 states have (on average 596.6666666666666) internal successors, (1790), 3 states have internal predecessors, (1790), 0 states have call successors, (0), 0 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 15:21:57,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:21:57,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 594 of 1303 [2023-11-17 15:21:57,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:22:25,809 INFO L124 PetriNetUnfolderBase]: 345555/449883 cut-off events. [2023-11-17 15:22:25,809 INFO L125 PetriNetUnfolderBase]: For 9624/9624 co-relation queries the response was YES. [2023-11-17 15:22:26,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 903556 conditions, 449883 events. 345555/449883 cut-off events. For 9624/9624 co-relation queries the response was YES. Maximal size of possible extension queue 7611. Compared 2823772 event pairs, 272761 based on Foata normal form. 0/331924 useless extension candidates. Maximal degree in co-relation 196232. Up to 449063 conditions per place. [2023-11-17 15:22:28,054 INFO L140 encePairwiseOnDemand]: 1292/1303 looper letters, 104 selfloop transitions, 2 changer transitions 0/109 dead transitions. [2023-11-17 15:22:28,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 109 transitions, 457 flow [2023-11-17 15:22:28,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:22:28,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:22:28,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1897 transitions. [2023-11-17 15:22:28,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4852903555896649 [2023-11-17 15:22:28,059 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1897 transitions. [2023-11-17 15:22:28,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1897 transitions. [2023-11-17 15:22:28,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:22:28,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1897 transitions. [2023-11-17 15:22:28,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 632.3333333333334) internal successors, (1897), 3 states have internal predecessors, (1897), 0 states have call successors, (0), 0 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 15:22:28,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1303.0) internal successors, (5212), 4 states have internal predecessors, (5212), 0 states have call successors, (0), 0 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 15:22:28,068 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1303.0) internal successors, (5212), 4 states have internal predecessors, (5212), 0 states have call successors, (0), 0 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 15:22:28,068 INFO L175 Difference]: Start difference. First operand has 93 places, 116 transitions, 259 flow. Second operand 3 states and 1897 transitions. [2023-11-17 15:22:28,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 109 transitions, 457 flow [2023-11-17 15:22:28,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 109 transitions, 457 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:22:28,074 INFO L231 Difference]: Finished difference. Result has 96 places, 109 transitions, 255 flow [2023-11-17 15:22:28,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1303, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=255, PETRI_PLACES=96, PETRI_TRANSITIONS=109} [2023-11-17 15:22:28,075 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, 3 predicate places. [2023-11-17 15:22:28,075 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 109 transitions, 255 flow [2023-11-17 15:22:28,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 596.6666666666666) internal successors, (1790), 3 states have internal predecessors, (1790), 0 states have call successors, (0), 0 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 15:22:28,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:22:28,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:22:28,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 15:22:28,076 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:22:28,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:22:28,076 INFO L85 PathProgramCache]: Analyzing trace with hash -513206083, now seen corresponding path program 1 times [2023-11-17 15:22:28,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:22:28,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726415306] [2023-11-17 15:22:28,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:22:28,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:22:28,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:22:28,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:22:28,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:22:28,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726415306] [2023-11-17 15:22:28,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726415306] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:22:28,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:22:28,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:22:28,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256198797] [2023-11-17 15:22:28,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:22:28,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:22:28,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:22:28,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:22:28,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:22:28,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 602 out of 1303 [2023-11-17 15:22:28,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 109 transitions, 255 flow. Second operand has 3 states, 3 states have (on average 605.6666666666666) internal successors, (1817), 3 states have internal predecessors, (1817), 0 states have call successors, (0), 0 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 15:22:28,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:22:28,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 602 of 1303 [2023-11-17 15:22:28,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand