/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/11_fmaxsymopt.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:06:53,019 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:06:53,078 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 15:06:53,108 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:06:53,109 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:06:53,109 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:06:53,109 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:06:53,110 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:06:53,110 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:06:53,113 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:06:53,114 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:06:53,114 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:06:53,114 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:06:53,115 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:06:53,115 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:06:53,115 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:06:53,115 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:06:53,115 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:06:53,116 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:06:53,116 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:06:53,116 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:06:53,116 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:06:53,117 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:06:53,117 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:06:53,117 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:06:53,117 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:06:53,118 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:06:53,118 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:06:53,118 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:06:53,118 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:06:53,119 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:06:53,119 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:06:53,119 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:06:53,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:06:53,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:06:53,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:06:53,302 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:06:53,302 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:06:53,303 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/11_fmaxsymopt.i [2023-11-17 15:06:54,330 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:06:54,515 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:06:54,515 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/11_fmaxsymopt.i [2023-11-17 15:06:54,524 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c0aa65b9/0479698aed9f45908b9de9c4a3779bbc/FLAG857cc77bf [2023-11-17 15:06:54,535 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c0aa65b9/0479698aed9f45908b9de9c4a3779bbc [2023-11-17 15:06:54,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:06:54,538 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:06:54,538 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:06:54,539 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:06:54,541 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:06:54,542 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:06:54" (1/1) ... [2023-11-17 15:06:54,543 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5648850d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:54, skipping insertion in model container [2023-11-17 15:06:54,543 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:06:54" (1/1) ... [2023-11-17 15:06:54,573 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:06:54,774 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/11_fmaxsymopt.i[30570,30583] [2023-11-17 15:06:54,782 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:06:54,789 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:06:54,819 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/11_fmaxsymopt.i[30570,30583] [2023-11-17 15:06:54,821 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:06:54,848 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:06:54,848 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:54 WrapperNode [2023-11-17 15:06:54,848 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:06:54,849 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:06:54,849 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:06:54,849 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:06:54,853 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:54" (1/1) ... [2023-11-17 15:06:54,861 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:54" (1/1) ... [2023-11-17 15:06:54,873 INFO L138 Inliner]: procedures = 171, calls = 26, calls flagged for inlining = 10, calls inlined = 12, statements flattened = 96 [2023-11-17 15:06:54,874 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:06:54,874 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:06:54,874 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:06:54,874 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:06:54,879 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:54" (1/1) ... [2023-11-17 15:06:54,879 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:54" (1/1) ... [2023-11-17 15:06:54,881 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:54" (1/1) ... [2023-11-17 15:06:54,881 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:54" (1/1) ... [2023-11-17 15:06:54,885 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:54" (1/1) ... [2023-11-17 15:06:54,887 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:54" (1/1) ... [2023-11-17 15:06:54,888 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:54" (1/1) ... [2023-11-17 15:06:54,888 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:54" (1/1) ... [2023-11-17 15:06:54,890 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:06:54,890 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:06:54,890 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:06:54,890 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:06:54,891 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:54" (1/1) ... [2023-11-17 15:06:54,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:06:54,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:06:54,946 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 15:06:54,979 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 15:06:54,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:06:54,995 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 15:06:54,995 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 15:06:54,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:06:54,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:06:54,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:06:54,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:06:54,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:06:54,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:06:54,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:06:54,998 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 15:06:55,095 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:06:55,096 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:06:55,256 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:06:55,313 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:06:55,313 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 15:06:55,315 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:06:55 BoogieIcfgContainer [2023-11-17 15:06:55,315 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:06:55,316 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:06:55,316 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:06:55,318 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:06:55,318 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:06:54" (1/3) ... [2023-11-17 15:06:55,319 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35f5800a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:06:55, skipping insertion in model container [2023-11-17 15:06:55,319 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:54" (2/3) ... [2023-11-17 15:06:55,319 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35f5800a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:06:55, skipping insertion in model container [2023-11-17 15:06:55,319 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:06:55" (3/3) ... [2023-11-17 15:06:55,320 INFO L112 eAbstractionObserver]: Analyzing ICFG 11_fmaxsymopt.i [2023-11-17 15:06:55,331 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:06:55,331 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:06:55,331 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:06:55,372 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:06:55,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 84 transitions, 172 flow [2023-11-17 15:06:55,428 INFO L124 PetriNetUnfolderBase]: 9/95 cut-off events. [2023-11-17 15:06:55,429 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:06:55,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 95 events. 9/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 96 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 63. Up to 4 conditions per place. [2023-11-17 15:06:55,433 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 84 transitions, 172 flow [2023-11-17 15:06:55,438 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 84 transitions, 172 flow [2023-11-17 15:06:55,440 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:06:55,455 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 84 transitions, 172 flow [2023-11-17 15:06:55,462 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 84 transitions, 172 flow [2023-11-17 15:06:55,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 84 transitions, 172 flow [2023-11-17 15:06:55,490 INFO L124 PetriNetUnfolderBase]: 9/95 cut-off events. [2023-11-17 15:06:55,490 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:06:55,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 95 events. 9/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 96 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 63. Up to 4 conditions per place. [2023-11-17 15:06:55,492 INFO L119 LiptonReduction]: Number of co-enabled transitions 1400 [2023-11-17 15:06:57,467 INFO L134 LiptonReduction]: Checked pairs total: 1192 [2023-11-17 15:06:57,467 INFO L136 LiptonReduction]: Total number of compositions: 90 [2023-11-17 15:06:57,485 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:06:57,491 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;@475415d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:06:57,491 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 15:06:57,494 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:06:57,494 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2023-11-17 15:06:57,494 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:06:57,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:06:57,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 15:06:57,495 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:06:57,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:06:57,498 INFO L85 PathProgramCache]: Analyzing trace with hash 447453723, now seen corresponding path program 1 times [2023-11-17 15:06:57,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:06:57,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788575571] [2023-11-17 15:06:57,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:06:57,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:06:57,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:06:57,627 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 15:06:57,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:06:57,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788575571] [2023-11-17 15:06:57,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788575571] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:06:57,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:06:57,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:06:57,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197902666] [2023-11-17 15:06:57,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:06:57,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:06:57,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:06:57,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:06:57,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:06:57,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 174 [2023-11-17 15:06:57,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 10 transitions, 24 flow. Second operand has 2 states, 2 states have (on average 75.5) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 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 15:06:57,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:06:57,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 174 [2023-11-17 15:06:57,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:06:57,668 INFO L124 PetriNetUnfolderBase]: 7/19 cut-off events. [2023-11-17 15:06:57,668 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:06:57,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 19 events. 7/19 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 23 event pairs, 4 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 30. Up to 19 conditions per place. [2023-11-17 15:06:57,669 INFO L140 encePairwiseOnDemand]: 172/174 looper letters, 7 selfloop transitions, 0 changer transitions 0/8 dead transitions. [2023-11-17 15:06:57,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 11 places, 8 transitions, 34 flow [2023-11-17 15:06:57,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 15:06:57,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 15:06:57,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 155 transitions. [2023-11-17 15:06:57,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4454022988505747 [2023-11-17 15:06:57,678 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 155 transitions. [2023-11-17 15:06:57,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 155 transitions. [2023-11-17 15:06:57,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:06:57,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 155 transitions. [2023-11-17 15:06:57,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 77.5) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 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 15:06:57,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 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 15:06:57,685 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 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 15:06:57,686 INFO L175 Difference]: Start difference. First operand has 12 places, 10 transitions, 24 flow. Second operand 2 states and 155 transitions. [2023-11-17 15:06:57,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 11 places, 8 transitions, 34 flow [2023-11-17 15:06:57,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 11 places, 8 transitions, 34 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:06:57,688 INFO L231 Difference]: Finished difference. Result has 11 places, 8 transitions, 20 flow [2023-11-17 15:06:57,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=20, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=20, PETRI_PLACES=11, PETRI_TRANSITIONS=8} [2023-11-17 15:06:57,692 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, -1 predicate places. [2023-11-17 15:06:57,692 INFO L495 AbstractCegarLoop]: Abstraction has has 11 places, 8 transitions, 20 flow [2023-11-17 15:06:57,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 75.5) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 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 15:06:57,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:06:57,692 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:06:57,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:06:57,692 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:06:57,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:06:57,693 INFO L85 PathProgramCache]: Analyzing trace with hash 986106276, now seen corresponding path program 1 times [2023-11-17 15:06:57,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:06:57,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744971886] [2023-11-17 15:06:57,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:06:57,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:06:57,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:06:57,721 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:06:57,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:06:57,756 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:06:57,756 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:06:57,757 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 15:06:57,758 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 15:06:57,758 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 15:06:57,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:06:57,759 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:06:57,760 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:06:57,760 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:06:57,789 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:06:57,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 135 transitions, 280 flow [2023-11-17 15:06:57,823 INFO L124 PetriNetUnfolderBase]: 17/159 cut-off events. [2023-11-17 15:06:57,824 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:06:57,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 159 events. 17/159 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 302 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 113. Up to 6 conditions per place. [2023-11-17 15:06:57,828 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 135 transitions, 280 flow [2023-11-17 15:06:57,829 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 135 transitions, 280 flow [2023-11-17 15:06:57,829 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:06:57,829 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 135 transitions, 280 flow [2023-11-17 15:06:57,829 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 135 transitions, 280 flow [2023-11-17 15:06:57,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 135 transitions, 280 flow [2023-11-17 15:06:57,854 INFO L124 PetriNetUnfolderBase]: 17/159 cut-off events. [2023-11-17 15:06:57,855 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:06:57,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 159 events. 17/159 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 302 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 113. Up to 6 conditions per place. [2023-11-17 15:06:57,859 INFO L119 LiptonReduction]: Number of co-enabled transitions 7900 [2023-11-17 15:06:59,915 INFO L134 LiptonReduction]: Checked pairs total: 13807 [2023-11-17 15:06:59,915 INFO L136 LiptonReduction]: Total number of compositions: 120 [2023-11-17 15:06:59,918 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:06:59,922 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;@475415d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:06:59,922 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 15:06:59,924 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:06:59,924 INFO L124 PetriNetUnfolderBase]: 2/15 cut-off events. [2023-11-17 15:06:59,924 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:06:59,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:06:59,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 15:06:59,925 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:06:59,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:06:59,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1374885747, now seen corresponding path program 1 times [2023-11-17 15:06:59,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:06:59,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272636185] [2023-11-17 15:06:59,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:06:59,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:06:59,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:06:59,970 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 15:06:59,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:06:59,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272636185] [2023-11-17 15:06:59,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272636185] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:06:59,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:06:59,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:06:59,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548522823] [2023-11-17 15:06:59,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:06:59,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:06:59,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:06:59,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:06:59,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:06:59,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 255 [2023-11-17 15:06:59,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 36 transitions, 82 flow. Second operand has 2 states, 2 states have (on average 117.5) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 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 15:06:59,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:06:59,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 255 [2023-11-17 15:06:59,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:07:00,028 INFO L124 PetriNetUnfolderBase]: 135/317 cut-off events. [2023-11-17 15:07:00,028 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-17 15:07:00,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 548 conditions, 317 events. 135/317 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1502 event pairs, 95 based on Foata normal form. 24/274 useless extension candidates. Maximal degree in co-relation 206. Up to 208 conditions per place. [2023-11-17 15:07:00,030 INFO L140 encePairwiseOnDemand]: 250/255 looper letters, 16 selfloop transitions, 0 changer transitions 0/31 dead transitions. [2023-11-17 15:07:00,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 31 transitions, 104 flow [2023-11-17 15:07:00,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 15:07:00,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 15:07:00,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 251 transitions. [2023-11-17 15:07:00,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.492156862745098 [2023-11-17 15:07:00,032 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 251 transitions. [2023-11-17 15:07:00,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 251 transitions. [2023-11-17 15:07:00,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:07:00,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 251 transitions. [2023-11-17 15:07:00,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 125.5) internal successors, (251), 2 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:00,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:00,034 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:00,034 INFO L175 Difference]: Start difference. First operand has 33 places, 36 transitions, 82 flow. Second operand 2 states and 251 transitions. [2023-11-17 15:07:00,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 31 transitions, 104 flow [2023-11-17 15:07:00,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 31 transitions, 104 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:07:00,035 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 72 flow [2023-11-17 15:07:00,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=72, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-11-17 15:07:00,036 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 0 predicate places. [2023-11-17 15:07:00,036 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 72 flow [2023-11-17 15:07:00,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 117.5) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:00,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:00,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:07:00,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:07:00,037 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:07:00,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:00,037 INFO L85 PathProgramCache]: Analyzing trace with hash 254877058, now seen corresponding path program 1 times [2023-11-17 15:07:00,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:00,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74507044] [2023-11-17 15:07:00,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:00,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:07:00,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:07:00,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:07:00,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74507044] [2023-11-17 15:07:00,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74507044] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:07:00,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:07:00,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:07:00,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066039894] [2023-11-17 15:07:00,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:07:00,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:07:00,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:07:00,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:07:00,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:07:00,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 255 [2023-11-17 15:07:00,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:00,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:07:00,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 255 [2023-11-17 15:07:00,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:07:00,126 INFO L124 PetriNetUnfolderBase]: 151/351 cut-off events. [2023-11-17 15:07:00,126 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-11-17 15:07:00,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 351 events. 151/351 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1711 event pairs, 95 based on Foata normal form. 0/281 useless extension candidates. Maximal degree in co-relation 615. Up to 208 conditions per place. [2023-11-17 15:07:00,128 INFO L140 encePairwiseOnDemand]: 252/255 looper letters, 23 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-11-17 15:07:00,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 145 flow [2023-11-17 15:07:00,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:07:00,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:07:00,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 341 transitions. [2023-11-17 15:07:00,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44575163398692813 [2023-11-17 15:07:00,129 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 341 transitions. [2023-11-17 15:07:00,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 341 transitions. [2023-11-17 15:07:00,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:07:00,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 341 transitions. [2023-11-17 15:07:00,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:00,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:00,132 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:00,132 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 72 flow. Second operand 3 states and 341 transitions. [2023-11-17 15:07:00,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 145 flow [2023-11-17 15:07:00,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 40 transitions, 145 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:07:00,133 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 84 flow [2023-11-17 15:07:00,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2023-11-17 15:07:00,134 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2023-11-17 15:07:00,134 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 84 flow [2023-11-17 15:07:00,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:00,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:00,135 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:07:00,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:07:00,135 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:07:00,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:00,135 INFO L85 PathProgramCache]: Analyzing trace with hash 435558552, now seen corresponding path program 1 times [2023-11-17 15:07:00,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:00,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924070082] [2023-11-17 15:07:00,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:00,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:00,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:07:00,145 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:07:00,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:07:00,153 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:07:00,153 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:07:00,153 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 15:07:00,153 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 15:07:00,153 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 15:07:00,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 15:07:00,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:07:00,154 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:07:00,154 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:07:00,154 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:07:00,170 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:07:00,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 186 transitions, 390 flow [2023-11-17 15:07:00,189 INFO L124 PetriNetUnfolderBase]: 25/223 cut-off events. [2023-11-17 15:07:00,189 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:07:00,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 223 events. 25/223 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 574 event pairs, 0 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 163. Up to 8 conditions per place. [2023-11-17 15:07:00,190 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 186 transitions, 390 flow [2023-11-17 15:07:00,192 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 186 transitions, 390 flow [2023-11-17 15:07:00,192 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:07:00,192 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 186 transitions, 390 flow [2023-11-17 15:07:00,192 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 186 transitions, 390 flow [2023-11-17 15:07:00,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 186 transitions, 390 flow [2023-11-17 15:07:00,208 INFO L124 PetriNetUnfolderBase]: 25/223 cut-off events. [2023-11-17 15:07:00,208 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:07:00,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 223 events. 25/223 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 574 event pairs, 0 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 163. Up to 8 conditions per place. [2023-11-17 15:07:00,216 INFO L119 LiptonReduction]: Number of co-enabled transitions 19500 [2023-11-17 15:07:02,838 INFO L134 LiptonReduction]: Checked pairs total: 33732 [2023-11-17 15:07:02,838 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-11-17 15:07:02,841 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:07:02,849 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;@475415d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:07:02,849 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 15:07:02,852 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:07:02,852 INFO L124 PetriNetUnfolderBase]: 2/15 cut-off events. [2023-11-17 15:07:02,852 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:07:02,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:02,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 15:07:02,853 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:07:02,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:02,853 INFO L85 PathProgramCache]: Analyzing trace with hash 453193421, now seen corresponding path program 1 times [2023-11-17 15:07:02,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:02,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155178359] [2023-11-17 15:07:02,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:02,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:02,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:07:02,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:07:02,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:07:02,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155178359] [2023-11-17 15:07:02,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155178359] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:07:02,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:07:02,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:07:02,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280674007] [2023-11-17 15:07:02,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:07:02,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:07:02,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:07:02,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:07:02,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:07:02,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 354 [2023-11-17 15:07:02,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 51 transitions, 120 flow. Second operand has 2 states, 2 states have (on average 159.5) internal successors, (319), 2 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:02,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:07:02,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 354 [2023-11-17 15:07:02,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:07:03,067 INFO L124 PetriNetUnfolderBase]: 1323/2437 cut-off events. [2023-11-17 15:07:03,068 INFO L125 PetriNetUnfolderBase]: For 292/292 co-relation queries the response was YES. [2023-11-17 15:07:03,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4361 conditions, 2437 events. 1323/2437 cut-off events. For 292/292 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 15154 event pairs, 995 based on Foata normal form. 228/2173 useless extension candidates. Maximal degree in co-relation 551. Up to 1756 conditions per place. [2023-11-17 15:07:03,080 INFO L140 encePairwiseOnDemand]: 347/354 looper letters, 23 selfloop transitions, 0 changer transitions 0/44 dead transitions. [2023-11-17 15:07:03,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 152 flow [2023-11-17 15:07:03,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 15:07:03,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 15:07:03,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 344 transitions. [2023-11-17 15:07:03,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4858757062146893 [2023-11-17 15:07:03,081 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 344 transitions. [2023-11-17 15:07:03,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 344 transitions. [2023-11-17 15:07:03,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:07:03,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 344 transitions. [2023-11-17 15:07:03,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 172.0) internal successors, (344), 2 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:03,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 354.0) internal successors, (1062), 3 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:03,084 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 354.0) internal successors, (1062), 3 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:03,084 INFO L175 Difference]: Start difference. First operand has 46 places, 51 transitions, 120 flow. Second operand 2 states and 344 transitions. [2023-11-17 15:07:03,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 152 flow [2023-11-17 15:07:03,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 44 transitions, 150 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-17 15:07:03,087 INFO L231 Difference]: Finished difference. Result has 46 places, 44 transitions, 104 flow [2023-11-17 15:07:03,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=104, PETRI_PLACES=46, PETRI_TRANSITIONS=44} [2023-11-17 15:07:03,090 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 0 predicate places. [2023-11-17 15:07:03,090 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 44 transitions, 104 flow [2023-11-17 15:07:03,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 159.5) internal successors, (319), 2 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:03,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:03,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:07:03,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:07:03,090 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:07:03,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:03,091 INFO L85 PathProgramCache]: Analyzing trace with hash -310135754, now seen corresponding path program 1 times [2023-11-17 15:07:03,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:03,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609876417] [2023-11-17 15:07:03,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:03,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:03,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:07:03,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:07:03,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:07:03,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609876417] [2023-11-17 15:07:03,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609876417] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:07:03,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:07:03,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:07:03,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586559339] [2023-11-17 15:07:03,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:07:03,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:07:03,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:07:03,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:07:03,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:07:03,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 354 [2023-11-17 15:07:03,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:03,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:07:03,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 354 [2023-11-17 15:07:03,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:07:03,365 INFO L124 PetriNetUnfolderBase]: 1525/2729 cut-off events. [2023-11-17 15:07:03,366 INFO L125 PetriNetUnfolderBase]: For 209/209 co-relation queries the response was YES. [2023-11-17 15:07:03,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4931 conditions, 2729 events. 1525/2729 cut-off events. For 209/209 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 17022 event pairs, 995 based on Foata normal form. 0/2211 useless extension candidates. Maximal degree in co-relation 4925. Up to 1756 conditions per place. [2023-11-17 15:07:03,380 INFO L140 encePairwiseOnDemand]: 351/354 looper letters, 37 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-11-17 15:07:03,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 60 transitions, 224 flow [2023-11-17 15:07:03,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:07:03,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:07:03,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 481 transitions. [2023-11-17 15:07:03,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529190207156309 [2023-11-17 15:07:03,381 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 481 transitions. [2023-11-17 15:07:03,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 481 transitions. [2023-11-17 15:07:03,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:07:03,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 481 transitions. [2023-11-17 15:07:03,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:03,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:03,385 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:03,385 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 104 flow. Second operand 3 states and 481 transitions. [2023-11-17 15:07:03,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 60 transitions, 224 flow [2023-11-17 15:07:03,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 60 transitions, 224 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:07:03,388 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 116 flow [2023-11-17 15:07:03,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-11-17 15:07:03,390 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2023-11-17 15:07:03,390 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 116 flow [2023-11-17 15:07:03,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:03,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:03,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:07:03,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 15:07:03,390 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:07:03,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:03,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1997444319, now seen corresponding path program 1 times [2023-11-17 15:07:03,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:03,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131529227] [2023-11-17 15:07:03,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:03,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:03,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:07:03,433 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 15:07:03,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:07:03,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131529227] [2023-11-17 15:07:03,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131529227] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:07:03,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:07:03,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:07:03,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296726805] [2023-11-17 15:07:03,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:07:03,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:07:03,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:07:03,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:07:03,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:07:03,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 354 [2023-11-17 15:07:03,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:03,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:07:03,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 354 [2023-11-17 15:07:03,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:07:04,145 INFO L124 PetriNetUnfolderBase]: 8313/12007 cut-off events. [2023-11-17 15:07:04,145 INFO L125 PetriNetUnfolderBase]: For 1616/1616 co-relation queries the response was YES. [2023-11-17 15:07:04,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24982 conditions, 12007 events. 8313/12007 cut-off events. For 1616/1616 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 72335 event pairs, 4129 based on Foata normal form. 0/9622 useless extension candidates. Maximal degree in co-relation 24974. Up to 7978 conditions per place. [2023-11-17 15:07:04,202 INFO L140 encePairwiseOnDemand]: 347/354 looper letters, 62 selfloop transitions, 6 changer transitions 0/74 dead transitions. [2023-11-17 15:07:04,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 74 transitions, 320 flow [2023-11-17 15:07:04,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:07:04,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:07:04,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-11-17 15:07:04,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4397363465160075 [2023-11-17 15:07:04,204 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-11-17 15:07:04,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-11-17 15:07:04,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:07:04,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-11-17 15:07:04,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:04,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:04,207 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:04,207 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 116 flow. Second operand 3 states and 467 transitions. [2023-11-17 15:07:04,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 74 transitions, 320 flow [2023-11-17 15:07:04,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 74 transitions, 316 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 15:07:04,211 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 154 flow [2023-11-17 15:07:04,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2023-11-17 15:07:04,212 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 6 predicate places. [2023-11-17 15:07:04,212 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 154 flow [2023-11-17 15:07:04,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:04,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:04,212 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:07:04,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 15:07:04,213 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:07:04,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:04,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1593377917, now seen corresponding path program 1 times [2023-11-17 15:07:04,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:04,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738142178] [2023-11-17 15:07:04,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:04,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:04,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:07:04,259 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 15:07:04,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:07:04,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738142178] [2023-11-17 15:07:04,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738142178] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:07:04,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:07:04,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:07:04,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134668974] [2023-11-17 15:07:04,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:07:04,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:07:04,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:07:04,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:07:04,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:07:04,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 354 [2023-11-17 15:07:04,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:04,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:07:04,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 354 [2023-11-17 15:07:04,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:07:04,603 INFO L124 PetriNetUnfolderBase]: 2543/4754 cut-off events. [2023-11-17 15:07:04,603 INFO L125 PetriNetUnfolderBase]: For 1110/1377 co-relation queries the response was YES. [2023-11-17 15:07:04,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9425 conditions, 4754 events. 2543/4754 cut-off events. For 1110/1377 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 34355 event pairs, 1475 based on Foata normal form. 60/3930 useless extension candidates. Maximal degree in co-relation 9416. Up to 2996 conditions per place. [2023-11-17 15:07:04,625 INFO L140 encePairwiseOnDemand]: 351/354 looper letters, 40 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-11-17 15:07:04,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 66 transitions, 289 flow [2023-11-17 15:07:04,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:07:04,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:07:04,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 480 transitions. [2023-11-17 15:07:04,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519774011299435 [2023-11-17 15:07:04,627 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 480 transitions. [2023-11-17 15:07:04,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 480 transitions. [2023-11-17 15:07:04,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:07:04,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 480 transitions. [2023-11-17 15:07:04,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:04,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:04,630 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:04,630 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 154 flow. Second operand 3 states and 480 transitions. [2023-11-17 15:07:04,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 66 transitions, 289 flow [2023-11-17 15:07:04,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 66 transitions, 275 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:07:04,632 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 154 flow [2023-11-17 15:07:04,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2023-11-17 15:07:04,633 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 7 predicate places. [2023-11-17 15:07:04,633 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 154 flow [2023-11-17 15:07:04,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:04,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:04,633 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:07:04,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 15:07:04,633 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:07:04,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:04,634 INFO L85 PathProgramCache]: Analyzing trace with hash -2013637057, now seen corresponding path program 1 times [2023-11-17 15:07:04,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:04,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188266014] [2023-11-17 15:07:04,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:04,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:07:04,641 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:07:04,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:07:04,648 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:07:04,648 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:07:04,648 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 15:07:04,648 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 15:07:04,648 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 15:07:04,648 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 15:07:04,648 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 15:07:04,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 15:07:04,648 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-17 15:07:04,649 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:07:04,649 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:07:04,668 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:07:04,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 237 transitions, 502 flow [2023-11-17 15:07:04,693 INFO L124 PetriNetUnfolderBase]: 33/287 cut-off events. [2023-11-17 15:07:04,693 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:07:04,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306 conditions, 287 events. 33/287 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 872 event pairs, 0 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 231. Up to 10 conditions per place. [2023-11-17 15:07:04,695 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 237 transitions, 502 flow [2023-11-17 15:07:04,696 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 237 transitions, 502 flow [2023-11-17 15:07:04,696 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:07:04,696 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 217 places, 237 transitions, 502 flow [2023-11-17 15:07:04,696 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 217 places, 237 transitions, 502 flow [2023-11-17 15:07:04,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 237 transitions, 502 flow [2023-11-17 15:07:04,753 INFO L124 PetriNetUnfolderBase]: 33/287 cut-off events. [2023-11-17 15:07:04,753 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:07:04,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306 conditions, 287 events. 33/287 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 872 event pairs, 0 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 231. Up to 10 conditions per place. [2023-11-17 15:07:04,764 INFO L119 LiptonReduction]: Number of co-enabled transitions 36200 [2023-11-17 15:07:08,088 INFO L134 LiptonReduction]: Checked pairs total: 66516 [2023-11-17 15:07:08,088 INFO L136 LiptonReduction]: Total number of compositions: 225 [2023-11-17 15:07:08,090 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:07:08,090 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;@475415d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:07:08,090 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 15:07:08,092 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:07:08,092 INFO L124 PetriNetUnfolderBase]: 2/15 cut-off events. [2023-11-17 15:07:08,092 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:07:08,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:08,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 15:07:08,093 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:07:08,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:08,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1633355907, now seen corresponding path program 1 times [2023-11-17 15:07:08,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:08,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277527235] [2023-11-17 15:07:08,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:08,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:08,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:07:08,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:07:08,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:07:08,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277527235] [2023-11-17 15:07:08,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277527235] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:07:08,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:07:08,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:07:08,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187815815] [2023-11-17 15:07:08,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:07:08,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:07:08,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:07:08,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:07:08,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:07:08,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 462 [2023-11-17 15:07:08,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 66 transitions, 160 flow. Second operand has 2 states, 2 states have (on average 201.5) internal successors, (403), 2 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:08,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:07:08,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 462 [2023-11-17 15:07:08,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:07:09,242 INFO L124 PetriNetUnfolderBase]: 11043/17749 cut-off events. [2023-11-17 15:07:09,243 INFO L125 PetriNetUnfolderBase]: For 3148/3148 co-relation queries the response was YES. [2023-11-17 15:07:09,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32634 conditions, 17749 events. 11043/17749 cut-off events. For 3148/3148 co-relation queries the response was YES. Maximal size of possible extension queue 738. Compared 128724 event pairs, 8555 based on Foata normal form. 1884/16152 useless extension candidates. Maximal degree in co-relation 4399. Up to 13636 conditions per place. [2023-11-17 15:07:09,366 INFO L140 encePairwiseOnDemand]: 453/462 looper letters, 30 selfloop transitions, 0 changer transitions 0/57 dead transitions. [2023-11-17 15:07:09,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 57 transitions, 202 flow [2023-11-17 15:07:09,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 15:07:09,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 15:07:09,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 437 transitions. [2023-11-17 15:07:09,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47294372294372294 [2023-11-17 15:07:09,368 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 437 transitions. [2023-11-17 15:07:09,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 437 transitions. [2023-11-17 15:07:09,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:07:09,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 437 transitions. [2023-11-17 15:07:09,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 218.5) internal successors, (437), 2 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:09,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 462.0) internal successors, (1386), 3 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:09,371 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 462.0) internal successors, (1386), 3 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:09,371 INFO L175 Difference]: Start difference. First operand has 59 places, 66 transitions, 160 flow. Second operand 2 states and 437 transitions. [2023-11-17 15:07:09,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 57 transitions, 202 flow [2023-11-17 15:07:09,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 57 transitions, 196 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-17 15:07:09,373 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 136 flow [2023-11-17 15:07:09,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=136, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2023-11-17 15:07:09,374 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 0 predicate places. [2023-11-17 15:07:09,374 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 136 flow [2023-11-17 15:07:09,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 201.5) internal successors, (403), 2 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:09,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:09,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:07:09,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 15:07:09,375 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:07:09,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:09,375 INFO L85 PathProgramCache]: Analyzing trace with hash -2011633590, now seen corresponding path program 1 times [2023-11-17 15:07:09,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:09,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591970394] [2023-11-17 15:07:09,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:09,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:09,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:07:09,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:07:09,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:07:09,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591970394] [2023-11-17 15:07:09,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591970394] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:07:09,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:07:09,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:07:09,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601440619] [2023-11-17 15:07:09,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:07:09,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:07:09,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:07:09,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:07:09,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:07:09,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 462 [2023-11-17 15:07:09,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 191.33333333333334) internal successors, (574), 3 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:09,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:07:09,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 462 [2023-11-17 15:07:09,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:07:10,752 INFO L124 PetriNetUnfolderBase]: 12835/21035 cut-off events. [2023-11-17 15:07:10,752 INFO L125 PetriNetUnfolderBase]: For 1709/1709 co-relation queries the response was YES. [2023-11-17 15:07:10,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37854 conditions, 21035 events. 12835/21035 cut-off events. For 1709/1709 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 161828 event pairs, 7285 based on Foata normal form. 0/16961 useless extension candidates. Maximal degree in co-relation 37847. Up to 13636 conditions per place. [2023-11-17 15:07:10,849 INFO L140 encePairwiseOnDemand]: 459/462 looper letters, 51 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-11-17 15:07:10,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 80 transitions, 303 flow [2023-11-17 15:07:10,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:07:10,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:07:10,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 621 transitions. [2023-11-17 15:07:10,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2023-11-17 15:07:10,851 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 621 transitions. [2023-11-17 15:07:10,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 621 transitions. [2023-11-17 15:07:10,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:07:10,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 621 transitions. [2023-11-17 15:07:10,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:10,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 462.0) internal successors, (1848), 4 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:10,855 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 462.0) internal successors, (1848), 4 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:10,855 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 136 flow. Second operand 3 states and 621 transitions. [2023-11-17 15:07:10,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 80 transitions, 303 flow [2023-11-17 15:07:10,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 80 transitions, 303 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:07:10,859 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 148 flow [2023-11-17 15:07:10,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2023-11-17 15:07:10,860 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2023-11-17 15:07:10,860 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 148 flow [2023-11-17 15:07:10,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.33333333333334) internal successors, (574), 3 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:10,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:10,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:07:10,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-17 15:07:10,861 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:07:10,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:10,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1075032573, now seen corresponding path program 1 times [2023-11-17 15:07:10,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:10,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767780168] [2023-11-17 15:07:10,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:10,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:10,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:07:10,882 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 15:07:10,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:07:10,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767780168] [2023-11-17 15:07:10,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767780168] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:07:10,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:07:10,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:07:10,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177433367] [2023-11-17 15:07:10,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:07:10,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:07:10,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:07:10,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:07:10,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:07:10,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 462 [2023-11-17 15:07:10,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:10,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:07:10,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 462 [2023-11-17 15:07:10,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:07:19,869 INFO L124 PetriNetUnfolderBase]: 122533/160533 cut-off events. [2023-11-17 15:07:19,870 INFO L125 PetriNetUnfolderBase]: For 18322/18322 co-relation queries the response was YES. [2023-11-17 15:07:20,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331349 conditions, 160533 events. 122533/160533 cut-off events. For 18322/18322 co-relation queries the response was YES. Maximal size of possible extension queue 5348. Compared 1031305 event pairs, 63989 based on Foata normal form. 0/125665 useless extension candidates. Maximal degree in co-relation 331340. Up to 111286 conditions per place. [2023-11-17 15:07:21,024 INFO L140 encePairwiseOnDemand]: 454/462 looper letters, 85 selfloop transitions, 7 changer transitions 0/99 dead transitions. [2023-11-17 15:07:21,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 99 transitions, 429 flow [2023-11-17 15:07:21,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:07:21,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:07:21,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 602 transitions. [2023-11-17 15:07:21,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43434343434343436 [2023-11-17 15:07:21,026 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 602 transitions. [2023-11-17 15:07:21,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 602 transitions. [2023-11-17 15:07:21,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:07:21,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 602 transitions. [2023-11-17 15:07:21,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:21,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 462.0) internal successors, (1848), 4 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:21,030 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 462.0) internal successors, (1848), 4 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:21,030 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 148 flow. Second operand 3 states and 602 transitions. [2023-11-17 15:07:21,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 99 transitions, 429 flow [2023-11-17 15:07:21,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 99 transitions, 425 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 15:07:21,045 INFO L231 Difference]: Finished difference. Result has 65 places, 63 transitions, 194 flow [2023-11-17 15:07:21,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=65, PETRI_TRANSITIONS=63} [2023-11-17 15:07:21,045 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 6 predicate places. [2023-11-17 15:07:21,045 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 63 transitions, 194 flow [2023-11-17 15:07:21,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:21,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:21,046 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:07:21,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-17 15:07:21,046 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:07:21,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:21,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1499049896, now seen corresponding path program 1 times [2023-11-17 15:07:21,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:21,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089850415] [2023-11-17 15:07:21,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:21,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:21,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:07:21,066 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 15:07:21,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:07:21,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089850415] [2023-11-17 15:07:21,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089850415] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:07:21,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:07:21,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:07:21,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323849469] [2023-11-17 15:07:21,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:07:21,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:07:21,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:07:21,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:07:21,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:07:21,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 462 [2023-11-17 15:07:21,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 63 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:21,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:07:21,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 462 [2023-11-17 15:07:21,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:07:23,743 INFO L124 PetriNetUnfolderBase]: 25167/40854 cut-off events. [2023-11-17 15:07:23,744 INFO L125 PetriNetUnfolderBase]: For 10261/13530 co-relation queries the response was YES. [2023-11-17 15:07:23,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80784 conditions, 40854 events. 25167/40854 cut-off events. For 10261/13530 co-relation queries the response was YES. Maximal size of possible extension queue 1753. Compared 341323 event pairs, 13833 based on Foata normal form. 535/33368 useless extension candidates. Maximal degree in co-relation 80774. Up to 26630 conditions per place. [2023-11-17 15:07:23,981 INFO L140 encePairwiseOnDemand]: 459/462 looper letters, 54 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2023-11-17 15:07:23,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 87 transitions, 376 flow [2023-11-17 15:07:23,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:07:23,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:07:23,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 620 transitions. [2023-11-17 15:07:23,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44733044733044736 [2023-11-17 15:07:23,983 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 620 transitions. [2023-11-17 15:07:23,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 620 transitions. [2023-11-17 15:07:23,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:07:23,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 620 transitions. [2023-11-17 15:07:23,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:23,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 462.0) internal successors, (1848), 4 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:23,986 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 462.0) internal successors, (1848), 4 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:23,986 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 194 flow. Second operand 3 states and 620 transitions. [2023-11-17 15:07:23,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 87 transitions, 376 flow [2023-11-17 15:07:23,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 87 transitions, 360 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:07:23,998 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 192 flow [2023-11-17 15:07:23,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2023-11-17 15:07:23,998 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 7 predicate places. [2023-11-17 15:07:23,998 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 192 flow [2023-11-17 15:07:23,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:23,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:23,999 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:07:23,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-17 15:07:23,999 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:07:23,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:23,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1039254324, now seen corresponding path program 1 times [2023-11-17 15:07:23,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:23,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913765941] [2023-11-17 15:07:23,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:23,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:24,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:07:24,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 15:07:24,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:07:24,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913765941] [2023-11-17 15:07:24,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913765941] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:07:24,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:07:24,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:07:24,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291084109] [2023-11-17 15:07:24,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:07:24,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:07:24,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:07:24,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:07:24,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:07:24,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 462 [2023-11-17 15:07:24,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:24,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:07:24,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 462 [2023-11-17 15:07:24,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:07:36,943 INFO L124 PetriNetUnfolderBase]: 173993/230851 cut-off events. [2023-11-17 15:07:36,943 INFO L125 PetriNetUnfolderBase]: For 56653/56653 co-relation queries the response was YES. [2023-11-17 15:07:37,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515833 conditions, 230851 events. 173993/230851 cut-off events. For 56653/56653 co-relation queries the response was YES. Maximal size of possible extension queue 7916. Compared 1595626 event pairs, 88615 based on Foata normal form. 0/189352 useless extension candidates. Maximal degree in co-relation 515822. Up to 155836 conditions per place. [2023-11-17 15:07:38,594 INFO L140 encePairwiseOnDemand]: 454/462 looper letters, 92 selfloop transitions, 10 changer transitions 0/109 dead transitions. [2023-11-17 15:07:38,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 109 transitions, 524 flow [2023-11-17 15:07:38,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:07:38,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:07:38,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 601 transitions. [2023-11-17 15:07:38,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43362193362193363 [2023-11-17 15:07:38,596 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 601 transitions. [2023-11-17 15:07:38,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 601 transitions. [2023-11-17 15:07:38,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:07:38,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 601 transitions. [2023-11-17 15:07:38,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:38,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 462.0) internal successors, (1848), 4 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:38,599 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 462.0) internal successors, (1848), 4 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:38,599 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 192 flow. Second operand 3 states and 601 transitions. [2023-11-17 15:07:38,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 109 transitions, 524 flow [2023-11-17 15:07:38,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 109 transitions, 520 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 15:07:38,642 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 268 flow [2023-11-17 15:07:38,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=268, PETRI_PLACES=69, PETRI_TRANSITIONS=71} [2023-11-17 15:07:38,642 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 10 predicate places. [2023-11-17 15:07:38,642 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 268 flow [2023-11-17 15:07:38,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:38,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:38,643 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:07:38,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-17 15:07:38,643 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:07:38,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:38,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1625619400, now seen corresponding path program 1 times [2023-11-17 15:07:38,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:38,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215151744] [2023-11-17 15:07:38,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:38,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:38,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:07:38,663 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-17 15:07:38,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:07:38,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215151744] [2023-11-17 15:07:38,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215151744] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:07:38,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:07:38,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:07:38,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321652857] [2023-11-17 15:07:38,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:07:38,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:07:38,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:07:38,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:07:38,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:07:38,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 462 [2023-11-17 15:07:38,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 71 transitions, 268 flow. Second operand has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:38,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:07:38,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 462 [2023-11-17 15:07:38,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:07:43,447 INFO L124 PetriNetUnfolderBase]: 43554/70221 cut-off events. [2023-11-17 15:07:43,447 INFO L125 PetriNetUnfolderBase]: For 23197/32013 co-relation queries the response was YES. [2023-11-17 15:07:43,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147920 conditions, 70221 events. 43554/70221 cut-off events. For 23197/32013 co-relation queries the response was YES. Maximal size of possible extension queue 3113. Compared 625331 event pairs, 25174 based on Foata normal form. 1226/58427 useless extension candidates. Maximal degree in co-relation 147908. Up to 46796 conditions per place. [2023-11-17 15:07:43,918 INFO L140 encePairwiseOnDemand]: 459/462 looper letters, 57 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2023-11-17 15:07:43,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 96 transitions, 463 flow [2023-11-17 15:07:43,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:07:43,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:07:43,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 619 transitions. [2023-11-17 15:07:43,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4466089466089466 [2023-11-17 15:07:43,921 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 619 transitions. [2023-11-17 15:07:43,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 619 transitions. [2023-11-17 15:07:43,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:07:43,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 619 transitions. [2023-11-17 15:07:43,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:43,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 462.0) internal successors, (1848), 4 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:43,943 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 462.0) internal successors, (1848), 4 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:43,943 INFO L175 Difference]: Start difference. First operand has 69 places, 71 transitions, 268 flow. Second operand 3 states and 619 transitions. [2023-11-17 15:07:43,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 96 transitions, 463 flow [2023-11-17 15:07:43,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 96 transitions, 441 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:07:43,974 INFO L231 Difference]: Finished difference. Result has 70 places, 72 transitions, 260 flow [2023-11-17 15:07:43,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=462, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=260, PETRI_PLACES=70, PETRI_TRANSITIONS=72} [2023-11-17 15:07:43,975 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 11 predicate places. [2023-11-17 15:07:43,975 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 72 transitions, 260 flow [2023-11-17 15:07:43,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:43,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:43,976 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 15:07:43,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-17 15:07:43,976 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:07:43,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:43,976 INFO L85 PathProgramCache]: Analyzing trace with hash -2052057266, now seen corresponding path program 1 times [2023-11-17 15:07:43,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:43,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676839423] [2023-11-17 15:07:43,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:43,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:44,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:07:44,023 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:07:44,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:07:44,056 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:07:44,056 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:07:44,056 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 15:07:44,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 15:07:44,057 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-17 15:07:44,057 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 15:07:44,057 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 15:07:44,057 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 15:07:44,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-17 15:07:44,057 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:07:44,057 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:07:44,057 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 15:07:44,078 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:07:44,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 263 places, 288 transitions, 616 flow [2023-11-17 15:07:44,107 INFO L124 PetriNetUnfolderBase]: 41/351 cut-off events. [2023-11-17 15:07:44,107 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 15:07:44,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377 conditions, 351 events. 41/351 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1141 event pairs, 0 based on Foata normal form. 0/299 useless extension candidates. Maximal degree in co-relation 300. Up to 12 conditions per place. [2023-11-17 15:07:44,110 INFO L82 GeneralOperation]: Start removeDead. Operand has 263 places, 288 transitions, 616 flow [2023-11-17 15:07:44,111 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 263 places, 288 transitions, 616 flow [2023-11-17 15:07:44,112 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:07:44,112 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 263 places, 288 transitions, 616 flow [2023-11-17 15:07:44,112 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 263 places, 288 transitions, 616 flow [2023-11-17 15:07:44,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 263 places, 288 transitions, 616 flow [2023-11-17 15:07:44,139 INFO L124 PetriNetUnfolderBase]: 41/351 cut-off events. [2023-11-17 15:07:44,140 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 15:07:44,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377 conditions, 351 events. 41/351 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1141 event pairs, 0 based on Foata normal form. 0/299 useless extension candidates. Maximal degree in co-relation 300. Up to 12 conditions per place. [2023-11-17 15:07:44,150 INFO L119 LiptonReduction]: Number of co-enabled transitions 58000 [2023-11-17 15:07:47,897 INFO L134 LiptonReduction]: Checked pairs total: 103935 [2023-11-17 15:07:47,898 INFO L136 LiptonReduction]: Total number of compositions: 263 [2023-11-17 15:07:47,899 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:07:47,900 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;@475415d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:07:47,900 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 15:07:47,901 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:07:47,901 INFO L124 PetriNetUnfolderBase]: 1/10 cut-off events. [2023-11-17 15:07:47,901 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:07:47,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:47,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 15:07:47,901 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 15:07:47,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:47,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1019921043, now seen corresponding path program 1 times [2023-11-17 15:07:47,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:47,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878776090] [2023-11-17 15:07:47,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:47,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:07:47,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:07:47,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:07:47,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878776090] [2023-11-17 15:07:47,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878776090] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:07:47,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:07:47,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:07:47,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720310369] [2023-11-17 15:07:47,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:07:47,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:07:47,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:07:47,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:07:47,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:07:47,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 551 [2023-11-17 15:07:47,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 81 transitions, 202 flow. Second operand has 2 states, 2 states have (on average 243.5) internal successors, (487), 2 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:47,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:07:47,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 551 [2023-11-17 15:07:47,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:07:56,058 INFO L124 PetriNetUnfolderBase]: 84915/125173 cut-off events. [2023-11-17 15:07:56,058 INFO L125 PetriNetUnfolderBase]: For 29644/29644 co-relation queries the response was YES. [2023-11-17 15:07:56,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234667 conditions, 125173 events. 84915/125173 cut-off events. For 29644/29644 co-relation queries the response was YES. Maximal size of possible extension queue 4115. Compared 994482 event pairs, 66875 based on Foata normal form. 14412/115584 useless extension candidates. Maximal degree in co-relation 32887. Up to 100468 conditions per place. [2023-11-17 15:07:56,900 INFO L140 encePairwiseOnDemand]: 540/551 looper letters, 37 selfloop transitions, 0 changer transitions 0/70 dead transitions. [2023-11-17 15:07:56,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 70 transitions, 254 flow [2023-11-17 15:07:56,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 15:07:56,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 15:07:56,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 530 transitions. [2023-11-17 15:07:56,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4809437386569873 [2023-11-17 15:07:56,908 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 530 transitions. [2023-11-17 15:07:56,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 530 transitions. [2023-11-17 15:07:56,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:07:56,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 530 transitions. [2023-11-17 15:07:56,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 265.0) internal successors, (530), 2 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:56,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 551.0) internal successors, (1653), 3 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:56,912 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 551.0) internal successors, (1653), 3 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:56,912 INFO L175 Difference]: Start difference. First operand has 72 places, 81 transitions, 202 flow. Second operand 2 states and 530 transitions. [2023-11-17 15:07:56,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 70 transitions, 254 flow [2023-11-17 15:07:56,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 70 transitions, 242 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-17 15:07:56,926 INFO L231 Difference]: Finished difference. Result has 72 places, 70 transitions, 168 flow [2023-11-17 15:07:56,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=168, PETRI_PLACES=72, PETRI_TRANSITIONS=70} [2023-11-17 15:07:56,927 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 0 predicate places. [2023-11-17 15:07:56,927 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 70 transitions, 168 flow [2023-11-17 15:07:56,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 243.5) internal successors, (487), 2 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:56,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:56,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:07:56,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-17 15:07:56,927 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 15:07:56,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:56,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1433138554, now seen corresponding path program 1 times [2023-11-17 15:07:56,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:56,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148714806] [2023-11-17 15:07:56,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:56,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:56,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:07:56,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:07:56,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:07:56,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148714806] [2023-11-17 15:07:56,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148714806] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:07:56,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:07:56,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:07:56,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771671504] [2023-11-17 15:07:56,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:07:56,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:07:56,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:07:56,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:07:56,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:07:56,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 551 [2023-11-17 15:07:56,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:56,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:07:56,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 551 [2023-11-17 15:07:56,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:08:06,680 INFO L124 PetriNetUnfolderBase]: 98715/148409 cut-off events. [2023-11-17 15:08:06,681 INFO L125 PetriNetUnfolderBase]: For 13733/13733 co-relation queries the response was YES. [2023-11-17 15:08:07,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271069 conditions, 148409 events. 98715/148409 cut-off events. For 13733/13733 co-relation queries the response was YES. Maximal size of possible extension queue 4911. Compared 1252249 event pairs, 57639 based on Foata normal form. 0/120234 useless extension candidates. Maximal degree in co-relation 271061. Up to 100468 conditions per place. [2023-11-17 15:08:07,740 INFO L140 encePairwiseOnDemand]: 548/551 looper letters, 65 selfloop transitions, 2 changer transitions 0/100 dead transitions. [2023-11-17 15:08:07,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 100 transitions, 382 flow [2023-11-17 15:08:07,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:08:07,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:08:07,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 761 transitions. [2023-11-17 15:08:07,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603750756200847 [2023-11-17 15:08:07,757 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 761 transitions. [2023-11-17 15:08:07,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 761 transitions. [2023-11-17 15:08:07,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:08:07,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 761 transitions. [2023-11-17 15:08:07,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 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 15:08:07,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 551.0) internal successors, (2204), 4 states have internal predecessors, (2204), 0 states have call successors, (0), 0 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 15:08:07,774 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 551.0) internal successors, (2204), 4 states have internal predecessors, (2204), 0 states have call successors, (0), 0 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 15:08:07,775 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 168 flow. Second operand 3 states and 761 transitions. [2023-11-17 15:08:07,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 100 transitions, 382 flow [2023-11-17 15:08:07,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 100 transitions, 382 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:08:07,804 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 180 flow [2023-11-17 15:08:07,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2023-11-17 15:08:07,804 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2023-11-17 15:08:07,804 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 180 flow [2023-11-17 15:08:07,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 0 states have call successors, (0), 0 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 15:08:07,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:08:07,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:08:07,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-17 15:08:07,806 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 15:08:07,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:08:07,807 INFO L85 PathProgramCache]: Analyzing trace with hash -752776381, now seen corresponding path program 1 times [2023-11-17 15:08:07,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:08:07,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500295644] [2023-11-17 15:08:07,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:08:07,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:08:07,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:08:07,831 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 15:08:07,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:08:07,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500295644] [2023-11-17 15:08:07,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500295644] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:08:07,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:08:07,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:08:07,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157270952] [2023-11-17 15:08:07,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:08:07,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:08:07,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:08:07,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:08:07,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:08:07,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 551 [2023-11-17 15:08:07,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:07,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:08:07,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 551 [2023-11-17 15:08:07,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand