/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:21:55,669 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:21:55,724 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 11:21:55,740 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:21:55,740 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:21:55,741 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:21:55,741 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:21:55,741 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:21:55,742 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:21:55,742 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:21:55,742 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:21:55,742 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:21:55,743 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:21:55,743 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:21:55,743 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:21:55,743 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:21:55,744 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:21:55,744 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:21:55,744 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:21:55,744 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:21:55,744 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:21:55,745 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:21:55,745 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:21:55,745 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:21:55,745 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:21:55,745 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:21:55,746 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:21:55,746 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:21:55,746 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:21:55,746 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:21:55,746 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:21:55,747 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:21:55,747 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:21:55,958 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:21:55,983 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:21:55,986 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:21:55,987 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:21:55,987 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:21:55,988 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i [2023-11-17 11:21:57,101 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:21:57,364 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:21:57,367 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i [2023-11-17 11:21:57,381 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/887cadc13/52a1b81f23484c0bbe46ed714106e35d/FLAG6be778c1a [2023-11-17 11:21:57,393 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/887cadc13/52a1b81f23484c0bbe46ed714106e35d [2023-11-17 11:21:57,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:21:57,396 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:21:57,397 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:21:57,397 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:21:57,400 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:21:57,401 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:21:57" (1/1) ... [2023-11-17 11:21:57,402 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5101369f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:57, skipping insertion in model container [2023-11-17 11:21:57,402 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:21:57" (1/1) ... [2023-11-17 11:21:57,440 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:21:57,682 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/35_double_lock_p3_vs.i[30553,30566] [2023-11-17 11:21:57,691 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:21:57,698 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:21:57,736 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/35_double_lock_p3_vs.i[30553,30566] [2023-11-17 11:21:57,738 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:21:57,770 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:21:57,772 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:57 WrapperNode [2023-11-17 11:21:57,773 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:21:57,775 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:21:57,775 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:21:57,775 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:21:57,780 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:57" (1/1) ... [2023-11-17 11:21:57,813 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:57" (1/1) ... [2023-11-17 11:21:57,838 INFO L138 Inliner]: procedures = 172, calls = 27, calls flagged for inlining = 11, calls inlined = 15, statements flattened = 125 [2023-11-17 11:21:57,838 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:21:57,839 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:21:57,839 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:21:57,839 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:21:57,844 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:57" (1/1) ... [2023-11-17 11:21:57,844 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:57" (1/1) ... [2023-11-17 11:21:57,846 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:57" (1/1) ... [2023-11-17 11:21:57,846 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:57" (1/1) ... [2023-11-17 11:21:57,862 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:57" (1/1) ... [2023-11-17 11:21:57,865 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:57" (1/1) ... [2023-11-17 11:21:57,866 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:57" (1/1) ... [2023-11-17 11:21:57,867 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:57" (1/1) ... [2023-11-17 11:21:57,868 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:21:57,869 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:21:57,869 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:21:57,869 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:21:57,870 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:57" (1/1) ... [2023-11-17 11:21:57,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:21:57,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:21:57,916 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 11:21:57,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 11:21:57,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:21:57,945 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-11-17 11:21:57,945 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-11-17 11:21:57,945 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 11:21:57,945 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 11:21:57,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:21:57,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:21:57,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:21:57,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:21:57,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:21:57,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:21:57,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:21:57,948 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 11:21:58,071 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:21:58,073 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:21:58,235 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:21:58,403 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:21:58,404 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 11:21:58,409 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:21:58 BoogieIcfgContainer [2023-11-17 11:21:58,409 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:21:58,413 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:21:58,413 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:21:58,415 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:21:58,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:21:57" (1/3) ... [2023-11-17 11:21:58,416 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d8b76c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:21:58, skipping insertion in model container [2023-11-17 11:21:58,417 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:57" (2/3) ... [2023-11-17 11:21:58,417 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d8b76c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:21:58, skipping insertion in model container [2023-11-17 11:21:58,417 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:21:58" (3/3) ... [2023-11-17 11:21:58,418 INFO L112 eAbstractionObserver]: Analyzing ICFG 35_double_lock_p3_vs.i [2023-11-17 11:21:58,432 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:21:58,432 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:21:58,432 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:21:58,488 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:21:58,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 66 flow [2023-11-17 11:21:58,556 INFO L124 PetriNetUnfolderBase]: 3/30 cut-off events. [2023-11-17 11:21:58,556 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:21:58,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 30 events. 3/30 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 57 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 30. Up to 2 conditions per place. [2023-11-17 11:21:58,560 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 66 flow [2023-11-17 11:21:58,562 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 28 transitions, 63 flow [2023-11-17 11:21:58,565 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:21:58,591 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 31 places, 28 transitions, 63 flow [2023-11-17 11:21:58,593 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 31 places, 28 transitions, 63 flow [2023-11-17 11:21:58,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 28 transitions, 63 flow [2023-11-17 11:21:58,600 INFO L124 PetriNetUnfolderBase]: 3/30 cut-off events. [2023-11-17 11:21:58,600 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:21:58,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 30 events. 3/30 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 57 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 30. Up to 2 conditions per place. [2023-11-17 11:21:58,601 INFO L119 LiptonReduction]: Number of co-enabled transitions 394 [2023-11-17 11:21:59,161 INFO L134 LiptonReduction]: Checked pairs total: 690 [2023-11-17 11:21:59,162 INFO L136 LiptonReduction]: Total number of compositions: 17 [2023-11-17 11:21:59,187 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:21:59,192 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;@15b6c4da, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:21:59,192 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 11:21:59,199 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:21:59,199 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2023-11-17 11:21:59,199 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:21:59,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:21:59,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:21:59,200 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:21:59,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:21:59,205 INFO L85 PathProgramCache]: Analyzing trace with hash 12681659, now seen corresponding path program 1 times [2023-11-17 11:21:59,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:21:59,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722332026] [2023-11-17 11:21:59,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:21:59,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:21:59,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:21:59,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:21:59,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:21:59,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722332026] [2023-11-17 11:21:59,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722332026] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:21:59,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:21:59,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:21:59,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590509048] [2023-11-17 11:21:59,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:21:59,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:21:59,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:21:59,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:21:59,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:21:59,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 46 [2023-11-17 11:21:59,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 43 flow. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:21:59,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:21:59,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 46 [2023-11-17 11:21:59,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:21:59,482 INFO L124 PetriNetUnfolderBase]: 84/148 cut-off events. [2023-11-17 11:21:59,483 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:21:59,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 148 events. 84/148 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 465 event pairs, 57 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 288. Up to 138 conditions per place. [2023-11-17 11:21:59,488 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-11-17 11:21:59,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 15 transitions, 63 flow [2023-11-17 11:21:59,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:21:59,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:21:59,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 34 transitions. [2023-11-17 11:21:59,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2463768115942029 [2023-11-17 11:21:59,497 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 34 transitions. [2023-11-17 11:21:59,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 34 transitions. [2023-11-17 11:21:59,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:21:59,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 34 transitions. [2023-11-17 11:21:59,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:21:59,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:21:59,504 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:21:59,506 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 43 flow. Second operand 3 states and 34 transitions. [2023-11-17 11:21:59,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 15 transitions, 63 flow [2023-11-17 11:21:59,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 15 transitions, 62 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:21:59,510 INFO L231 Difference]: Finished difference. Result has 20 places, 15 transitions, 38 flow [2023-11-17 11:21:59,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=38, PETRI_PLACES=20, PETRI_TRANSITIONS=15} [2023-11-17 11:21:59,516 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -2 predicate places. [2023-11-17 11:21:59,516 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 15 transitions, 38 flow [2023-11-17 11:21:59,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:21:59,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:21:59,518 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-17 11:21:59,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:21:59,518 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:21:59,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:21:59,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1244253222, now seen corresponding path program 1 times [2023-11-17 11:21:59,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:21:59,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837913804] [2023-11-17 11:21:59,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:21:59,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:21:59,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:21:59,540 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:21:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:21:59,571 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:21:59,571 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:21:59,572 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 11:21:59,573 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 11:21:59,574 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-11-17 11:21:59,574 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 11:21:59,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:21:59,574 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:21:59,576 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:21:59,576 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:21:59,599 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:21:59,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 51 transitions, 122 flow [2023-11-17 11:21:59,617 INFO L124 PetriNetUnfolderBase]: 4/45 cut-off events. [2023-11-17 11:21:59,617 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:21:59,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 45 events. 4/45 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 96 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 52. Up to 3 conditions per place. [2023-11-17 11:21:59,617 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 51 transitions, 122 flow [2023-11-17 11:21:59,619 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 40 transitions, 93 flow [2023-11-17 11:21:59,619 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:21:59,620 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 44 places, 40 transitions, 93 flow [2023-11-17 11:21:59,620 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 44 places, 40 transitions, 93 flow [2023-11-17 11:21:59,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 40 transitions, 93 flow [2023-11-17 11:21:59,625 INFO L124 PetriNetUnfolderBase]: 4/45 cut-off events. [2023-11-17 11:21:59,626 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:21:59,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 45 events. 4/45 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 95 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 48. Up to 3 conditions per place. [2023-11-17 11:21:59,627 INFO L119 LiptonReduction]: Number of co-enabled transitions 962 [2023-11-17 11:22:00,341 INFO L134 LiptonReduction]: Checked pairs total: 2020 [2023-11-17 11:22:00,341 INFO L136 LiptonReduction]: Total number of compositions: 23 [2023-11-17 11:22:00,346 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:22:00,347 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;@15b6c4da, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:22:00,348 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 11:22:00,350 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:22:00,350 INFO L124 PetriNetUnfolderBase]: 2/10 cut-off events. [2023-11-17 11:22:00,350 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:22:00,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:00,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:22:00,351 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 11:22:00,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:00,351 INFO L85 PathProgramCache]: Analyzing trace with hash 14795522, now seen corresponding path program 1 times [2023-11-17 11:22:00,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:00,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345266645] [2023-11-17 11:22:00,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:00,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:00,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:22:00,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:22:00,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:22:00,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345266645] [2023-11-17 11:22:00,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345266645] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:22:00,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:22:00,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:22:00,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066363231] [2023-11-17 11:22:00,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:22:00,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:22:00,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:22:00,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:22:00,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:22:00,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 74 [2023-11-17 11:22:00,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:00,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:22:00,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 74 [2023-11-17 11:22:00,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:22:00,492 INFO L124 PetriNetUnfolderBase]: 699/991 cut-off events. [2023-11-17 11:22:00,493 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-11-17 11:22:00,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2027 conditions, 991 events. 699/991 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3569 event pairs, 507 based on Foata normal form. 0/892 useless extension candidates. Maximal degree in co-relation 2016. Up to 978 conditions per place. [2023-11-17 11:22:00,499 INFO L140 encePairwiseOnDemand]: 69/74 looper letters, 18 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2023-11-17 11:22:00,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 21 transitions, 93 flow [2023-11-17 11:22:00,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:22:00,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:22:00,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2023-11-17 11:22:00,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23873873873873874 [2023-11-17 11:22:00,500 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 53 transitions. [2023-11-17 11:22:00,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 53 transitions. [2023-11-17 11:22:00,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:22:00,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 53 transitions. [2023-11-17 11:22:00,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:00,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:00,502 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:00,502 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 63 flow. Second operand 3 states and 53 transitions. [2023-11-17 11:22:00,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 21 transitions, 93 flow [2023-11-17 11:22:00,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 21 transitions, 92 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:22:00,503 INFO L231 Difference]: Finished difference. Result has 27 places, 21 transitions, 56 flow [2023-11-17 11:22:00,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=27, PETRI_TRANSITIONS=21} [2023-11-17 11:22:00,504 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2023-11-17 11:22:00,504 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 21 transitions, 56 flow [2023-11-17 11:22:00,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:00,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:00,504 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2023-11-17 11:22:00,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:22:00,505 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 11:22:00,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:00,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1520632279, now seen corresponding path program 1 times [2023-11-17 11:22:00,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:00,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560155367] [2023-11-17 11:22:00,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:00,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:00,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:00,521 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:22:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:00,546 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:22:00,546 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:22:00,546 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 11:22:00,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 11:22:00,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2023-11-17 11:22:00,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 11:22:00,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 11:22:00,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:22:00,547 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:22:00,548 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:22:00,548 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:22:00,570 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:22:00,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 73 transitions, 182 flow [2023-11-17 11:22:00,578 INFO L124 PetriNetUnfolderBase]: 5/60 cut-off events. [2023-11-17 11:22:00,578 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:22:00,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 60 events. 5/60 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 148 event pairs, 0 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 71. Up to 4 conditions per place. [2023-11-17 11:22:00,580 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 73 transitions, 182 flow [2023-11-17 11:22:00,581 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 52 transitions, 125 flow [2023-11-17 11:22:00,581 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:22:00,582 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 52 transitions, 125 flow [2023-11-17 11:22:00,582 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 52 transitions, 125 flow [2023-11-17 11:22:00,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 52 transitions, 125 flow [2023-11-17 11:22:00,588 INFO L124 PetriNetUnfolderBase]: 5/60 cut-off events. [2023-11-17 11:22:00,588 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:22:00,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 60 events. 5/60 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 147 event pairs, 0 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 67. Up to 4 conditions per place. [2023-11-17 11:22:00,589 INFO L119 LiptonReduction]: Number of co-enabled transitions 1794 [2023-11-17 11:22:01,430 INFO L134 LiptonReduction]: Checked pairs total: 3594 [2023-11-17 11:22:01,431 INFO L136 LiptonReduction]: Total number of compositions: 31 [2023-11-17 11:22:01,433 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:22:01,434 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;@15b6c4da, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:22:01,434 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 11:22:01,435 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:22:01,436 INFO L124 PetriNetUnfolderBase]: 2/10 cut-off events. [2023-11-17 11:22:01,436 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:22:01,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:01,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:22:01,439 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-17 11:22:01,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:01,440 INFO L85 PathProgramCache]: Analyzing trace with hash 17771616, now seen corresponding path program 1 times [2023-11-17 11:22:01,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:01,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966178723] [2023-11-17 11:22:01,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:01,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:01,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:22:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:22:01,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:22:01,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966178723] [2023-11-17 11:22:01,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966178723] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:22:01,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:22:01,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:22:01,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9788788] [2023-11-17 11:22:01,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:22:01,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:22:01,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:22:01,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:22:01,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:22:01,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 104 [2023-11-17 11:22:01,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:01,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:22:01,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 104 [2023-11-17 11:22:01,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:22:01,987 INFO L124 PetriNetUnfolderBase]: 4899/6364 cut-off events. [2023-11-17 11:22:01,987 INFO L125 PetriNetUnfolderBase]: For 634/634 co-relation queries the response was YES. [2023-11-17 11:22:01,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13026 conditions, 6364 events. 4899/6364 cut-off events. For 634/634 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 25828 event pairs, 3657 based on Foata normal form. 0/5590 useless extension candidates. Maximal degree in co-relation 13014. Up to 6303 conditions per place. [2023-11-17 11:22:02,015 INFO L140 encePairwiseOnDemand]: 99/104 looper letters, 24 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-11-17 11:22:02,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 27 transitions, 125 flow [2023-11-17 11:22:02,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:22:02,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:22:02,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2023-11-17 11:22:02,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.22756410256410256 [2023-11-17 11:22:02,016 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 71 transitions. [2023-11-17 11:22:02,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 71 transitions. [2023-11-17 11:22:02,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:22:02,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 71 transitions. [2023-11-17 11:22:02,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:02,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:02,018 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:02,018 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 83 flow. Second operand 3 states and 71 transitions. [2023-11-17 11:22:02,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 27 transitions, 125 flow [2023-11-17 11:22:02,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 27 transitions, 122 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 11:22:02,020 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 74 flow [2023-11-17 11:22:02,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2023-11-17 11:22:02,021 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2023-11-17 11:22:02,021 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 74 flow [2023-11-17 11:22:02,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:02,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:02,021 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:22:02,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:22:02,021 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-17 11:22:02,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:02,022 INFO L85 PathProgramCache]: Analyzing trace with hash -819437725, now seen corresponding path program 1 times [2023-11-17 11:22:02,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:02,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399062586] [2023-11-17 11:22:02,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:02,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:02,032 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:22:02,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:02,041 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:22:02,042 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:22:02,042 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 11:22:02,042 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 11:22:02,042 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-11-17 11:22:02,042 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 11:22:02,042 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 11:22:02,042 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 11:22:02,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:22:02,042 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:22:02,043 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:22:02,043 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:22:02,074 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:22:02,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 95 transitions, 246 flow [2023-11-17 11:22:02,086 INFO L124 PetriNetUnfolderBase]: 6/75 cut-off events. [2023-11-17 11:22:02,086 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:22:02,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 75 events. 6/75 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 200 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 91. Up to 5 conditions per place. [2023-11-17 11:22:02,086 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 95 transitions, 246 flow [2023-11-17 11:22:02,087 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 64 transitions, 159 flow [2023-11-17 11:22:02,087 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:22:02,087 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 70 places, 64 transitions, 159 flow [2023-11-17 11:22:02,087 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 70 places, 64 transitions, 159 flow [2023-11-17 11:22:02,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 64 transitions, 159 flow [2023-11-17 11:22:02,092 INFO L124 PetriNetUnfolderBase]: 6/75 cut-off events. [2023-11-17 11:22:02,092 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:22:02,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 75 events. 6/75 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 200 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 87. Up to 5 conditions per place. [2023-11-17 11:22:02,093 INFO L119 LiptonReduction]: Number of co-enabled transitions 2890 [2023-11-17 11:22:02,968 INFO L134 LiptonReduction]: Checked pairs total: 5635 [2023-11-17 11:22:02,968 INFO L136 LiptonReduction]: Total number of compositions: 39 [2023-11-17 11:22:02,970 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:22:02,970 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;@15b6c4da, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:22:02,970 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 11:22:02,971 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:22:02,971 INFO L124 PetriNetUnfolderBase]: 2/10 cut-off events. [2023-11-17 11:22:02,971 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:22:02,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:02,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:22:02,972 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 11:22:02,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:02,972 INFO L85 PathProgramCache]: Analyzing trace with hash 21671507, now seen corresponding path program 1 times [2023-11-17 11:22:02,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:02,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454682357] [2023-11-17 11:22:02,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:02,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:02,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:22:02,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:22:02,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:22:02,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454682357] [2023-11-17 11:22:02,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454682357] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:22:02,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:22:02,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:22:02,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112412348] [2023-11-17 11:22:02,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:22:02,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:22:02,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:22:02,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:22:02,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:22:02,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 134 [2023-11-17 11:22:02,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:02,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:22:02,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 134 [2023-11-17 11:22:02,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:22:05,871 INFO L124 PetriNetUnfolderBase]: 31524/38854 cut-off events. [2023-11-17 11:22:05,872 INFO L125 PetriNetUnfolderBase]: For 5764/5764 co-relation queries the response was YES. [2023-11-17 11:22:05,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79642 conditions, 38854 events. 31524/38854 cut-off events. For 5764/5764 co-relation queries the response was YES. Maximal size of possible extension queue 1332. Compared 168772 event pairs, 23907 based on Foata normal form. 0/33579 useless extension candidates. Maximal degree in co-relation 79629. Up to 38553 conditions per place. [2023-11-17 11:22:06,064 INFO L140 encePairwiseOnDemand]: 129/134 looper letters, 30 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-11-17 11:22:06,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 33 transitions, 159 flow [2023-11-17 11:22:06,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:22:06,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:22:06,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2023-11-17 11:22:06,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.22139303482587064 [2023-11-17 11:22:06,065 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 89 transitions. [2023-11-17 11:22:06,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 89 transitions. [2023-11-17 11:22:06,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:22:06,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 89 transitions. [2023-11-17 11:22:06,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:06,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:06,067 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:06,067 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 105 flow. Second operand 3 states and 89 transitions. [2023-11-17 11:22:06,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 33 transitions, 159 flow [2023-11-17 11:22:06,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 33 transitions, 152 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-17 11:22:06,071 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 92 flow [2023-11-17 11:22:06,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2023-11-17 11:22:06,072 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -2 predicate places. [2023-11-17 11:22:06,072 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 92 flow [2023-11-17 11:22:06,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:06,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:06,072 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:22:06,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 11:22:06,072 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 11:22:06,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:06,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1499856900, now seen corresponding path program 1 times [2023-11-17 11:22:06,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:06,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111887914] [2023-11-17 11:22:06,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:06,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:06,084 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:22:06,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:06,094 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:22:06,094 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:22:06,094 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-17 11:22:06,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-17 11:22:06,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2023-11-17 11:22:06,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-17 11:22:06,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-17 11:22:06,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-17 11:22:06,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-17 11:22:06,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 11:22:06,095 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:22:06,096 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:22:06,096 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 11:22:06,127 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:22:06,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 117 transitions, 314 flow [2023-11-17 11:22:06,135 INFO L124 PetriNetUnfolderBase]: 7/90 cut-off events. [2023-11-17 11:22:06,135 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 11:22:06,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 90 events. 7/90 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 252 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 112. Up to 6 conditions per place. [2023-11-17 11:22:06,136 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 117 transitions, 314 flow [2023-11-17 11:22:06,136 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 76 transitions, 195 flow [2023-11-17 11:22:06,136 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:22:06,136 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 76 transitions, 195 flow [2023-11-17 11:22:06,137 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 76 transitions, 195 flow [2023-11-17 11:22:06,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 76 transitions, 195 flow [2023-11-17 11:22:06,142 INFO L124 PetriNetUnfolderBase]: 7/90 cut-off events. [2023-11-17 11:22:06,142 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 11:22:06,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 90 events. 7/90 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 252 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 108. Up to 6 conditions per place. [2023-11-17 11:22:06,144 INFO L119 LiptonReduction]: Number of co-enabled transitions 4250 [2023-11-17 11:22:07,527 INFO L134 LiptonReduction]: Checked pairs total: 8564 [2023-11-17 11:22:07,527 INFO L136 LiptonReduction]: Total number of compositions: 47 [2023-11-17 11:22:07,529 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:22:07,530 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;@15b6c4da, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:22:07,530 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-17 11:22:07,531 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:22:07,531 INFO L124 PetriNetUnfolderBase]: 2/10 cut-off events. [2023-11-17 11:22:07,532 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:22:07,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:07,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:22:07,532 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-11-17 11:22:07,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:07,532 INFO L85 PathProgramCache]: Analyzing trace with hash 26494087, now seen corresponding path program 1 times [2023-11-17 11:22:07,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:07,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128299815] [2023-11-17 11:22:07,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:07,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:07,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:22:07,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:22:07,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:22:07,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128299815] [2023-11-17 11:22:07,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128299815] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:22:07,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:22:07,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:22:07,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044655701] [2023-11-17 11:22:07,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:22:07,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:22:07,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:22:07,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:22:07,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:22:07,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 164 [2023-11-17 11:22:07,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:07,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:22:07,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 164 [2023-11-17 11:22:07,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:22:24,192 INFO L124 PetriNetUnfolderBase]: 192774/229429 cut-off events. [2023-11-17 11:22:24,192 INFO L125 PetriNetUnfolderBase]: For 45577/45577 co-relation queries the response was YES. [2023-11-17 11:22:24,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 470843 conditions, 229429 events. 192774/229429 cut-off events. For 45577/45577 co-relation queries the response was YES. Maximal size of possible extension queue 6214. Compared 1045243 event pairs, 147657 based on Foata normal form. 0/196030 useless extension candidates. Maximal degree in co-relation 470829. Up to 227928 conditions per place. [2023-11-17 11:22:25,500 INFO L140 encePairwiseOnDemand]: 159/164 looper letters, 36 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-11-17 11:22:25,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 39 transitions, 195 flow [2023-11-17 11:22:25,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:22:25,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:22:25,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2023-11-17 11:22:25,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.21747967479674796 [2023-11-17 11:22:25,505 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 107 transitions. [2023-11-17 11:22:25,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 107 transitions. [2023-11-17 11:22:25,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:22:25,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 107 transitions. [2023-11-17 11:22:25,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:25,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:25,513 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:25,513 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 129 flow. Second operand 3 states and 107 transitions. [2023-11-17 11:22:25,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 39 transitions, 195 flow [2023-11-17 11:22:25,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 39 transitions, 182 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-17 11:22:25,546 INFO L231 Difference]: Finished difference. Result has 48 places, 39 transitions, 110 flow [2023-11-17 11:22:25,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=48, PETRI_TRANSITIONS=39} [2023-11-17 11:22:25,549 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2023-11-17 11:22:25,549 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 39 transitions, 110 flow [2023-11-17 11:22:25,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:25,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:25,549 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:22:25,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 11:22:25,549 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-11-17 11:22:25,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:25,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1738410900, now seen corresponding path program 1 times [2023-11-17 11:22:25,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:25,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443998770] [2023-11-17 11:22:25,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:25,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:25,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:25,572 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:22:25,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:25,588 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:22:25,589 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:22:25,589 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-11-17 11:22:25,589 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2023-11-17 11:22:25,589 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 8 remaining) [2023-11-17 11:22:25,589 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2023-11-17 11:22:25,589 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2023-11-17 11:22:25,589 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2023-11-17 11:22:25,589 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2023-11-17 11:22:25,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2023-11-17 11:22:25,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 11:22:25,590 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:22:25,590 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:22:25,590 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-11-17 11:22:25,626 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:22:25,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 139 transitions, 386 flow [2023-11-17 11:22:25,636 INFO L124 PetriNetUnfolderBase]: 8/105 cut-off events. [2023-11-17 11:22:25,636 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-17 11:22:25,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 105 events. 8/105 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 310 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 134. Up to 7 conditions per place. [2023-11-17 11:22:25,637 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 139 transitions, 386 flow [2023-11-17 11:22:25,638 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 88 transitions, 233 flow [2023-11-17 11:22:25,638 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:22:25,638 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 96 places, 88 transitions, 233 flow [2023-11-17 11:22:25,638 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 96 places, 88 transitions, 233 flow [2023-11-17 11:22:25,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 88 transitions, 233 flow [2023-11-17 11:22:25,644 INFO L124 PetriNetUnfolderBase]: 8/105 cut-off events. [2023-11-17 11:22:25,644 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-17 11:22:25,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 105 events. 8/105 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 303 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 130. Up to 7 conditions per place. [2023-11-17 11:22:25,647 INFO L119 LiptonReduction]: Number of co-enabled transitions 5874 [2023-11-17 11:22:27,292 INFO L134 LiptonReduction]: Checked pairs total: 9861 [2023-11-17 11:22:27,293 INFO L136 LiptonReduction]: Total number of compositions: 55 [2023-11-17 11:22:27,294 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:22:27,295 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;@15b6c4da, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:22:27,295 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-17 11:22:27,296 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:22:27,296 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2023-11-17 11:22:27,296 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:22:27,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:27,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:22:27,297 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-17 11:22:27,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:27,298 INFO L85 PathProgramCache]: Analyzing trace with hash 32239900, now seen corresponding path program 1 times [2023-11-17 11:22:27,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:27,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661227795] [2023-11-17 11:22:27,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:27,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:22:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:22:27,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:22:27,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661227795] [2023-11-17 11:22:27,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661227795] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:22:27,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:22:27,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:22:27,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344739817] [2023-11-17 11:22:27,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:22:27,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:22:27,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:22:27,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:22:27,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:22:27,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 194 [2023-11-17 11:22:27,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 153 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:27,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:22:27,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 194 [2023-11-17 11:22:27,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand