/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:08:52,874 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:08:52,945 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 15:08:53,146 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:08:53,147 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:08:53,147 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:08:53,148 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:08:53,148 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:08:53,148 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:08:53,149 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:08:53,149 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:08:53,149 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:08:53,149 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:08:53,150 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:08:53,150 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:08:53,150 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:08:53,150 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:08:53,151 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:08:53,151 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:08:53,151 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:08:53,151 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:08:53,155 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:08:53,155 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:08:53,155 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:08:53,155 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:08:53,156 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:08:53,156 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:08:53,156 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:08:53,156 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:08:53,156 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:08:53,157 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:08:53,157 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:08:53,157 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:08:53,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:08:53,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:08:53,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:08:53,346 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:08:53,346 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:08:53,347 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas.i [2023-11-17 15:08:54,449 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:08:54,620 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:08:54,621 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas.i [2023-11-17 15:08:54,632 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d4726741/52f1731afc3a43eabdf4cffa062bf05d/FLAGf86f3e04a [2023-11-17 15:08:54,642 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d4726741/52f1731afc3a43eabdf4cffa062bf05d [2023-11-17 15:08:54,644 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:08:54,645 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:08:54,646 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:08:54,646 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:08:54,649 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:08:54,650 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:08:54" (1/1) ... [2023-11-17 15:08:54,651 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69913112 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:54, skipping insertion in model container [2023-11-17 15:08:54,651 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:08:54" (1/1) ... [2023-11-17 15:08:54,676 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:08:54,933 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/26_stack_cas.i[31294,31307] [2023-11-17 15:08:54,943 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:08:54,951 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:08:54,993 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/26_stack_cas.i[31294,31307] [2023-11-17 15:08:54,999 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:08:55,061 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:08:55,061 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:08:55,066 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:08:55,067 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:55 WrapperNode [2023-11-17 15:08:55,067 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:08:55,068 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:08:55,068 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:08:55,068 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:08:55,073 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:55" (1/1) ... [2023-11-17 15:08:55,087 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:55" (1/1) ... [2023-11-17 15:08:55,126 INFO L138 Inliner]: procedures = 179, calls = 49, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 189 [2023-11-17 15:08:55,127 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:08:55,127 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:08:55,128 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:08:55,128 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:08:55,134 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:55" (1/1) ... [2023-11-17 15:08:55,135 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:55" (1/1) ... [2023-11-17 15:08:55,137 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:55" (1/1) ... [2023-11-17 15:08:55,137 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:55" (1/1) ... [2023-11-17 15:08:55,153 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:55" (1/1) ... [2023-11-17 15:08:55,156 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:55" (1/1) ... [2023-11-17 15:08:55,157 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:55" (1/1) ... [2023-11-17 15:08:55,158 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:55" (1/1) ... [2023-11-17 15:08:55,160 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:08:55,161 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:08:55,161 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:08:55,161 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:08:55,161 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:55" (1/1) ... [2023-11-17 15:08:55,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:08:55,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:08:55,202 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 15:08:55,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 15:08:55,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:08:55,228 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 15:08:55,228 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 15:08:55,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:08:55,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 15:08:55,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:08:55,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:08:55,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:08:55,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:08:55,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 15:08:55,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:08:55,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:08:55,231 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 15:08:55,325 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:08:55,326 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:08:55,560 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:08:55,667 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:08:55,668 INFO L307 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-17 15:08:55,670 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:08:55 BoogieIcfgContainer [2023-11-17 15:08:55,670 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:08:55,673 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:08:55,673 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:08:55,675 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:08:55,675 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:08:54" (1/3) ... [2023-11-17 15:08:55,676 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f16558b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:08:55, skipping insertion in model container [2023-11-17 15:08:55,676 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:55" (2/3) ... [2023-11-17 15:08:55,676 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f16558b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:08:55, skipping insertion in model container [2023-11-17 15:08:55,676 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:08:55" (3/3) ... [2023-11-17 15:08:55,677 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas.i [2023-11-17 15:08:55,690 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:08:55,690 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:08:55,690 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:08:55,750 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:08:55,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 115 transitions, 234 flow [2023-11-17 15:08:55,835 INFO L124 PetriNetUnfolderBase]: 11/126 cut-off events. [2023-11-17 15:08:55,835 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:08:55,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 126 events. 11/126 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 136 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 92. Up to 4 conditions per place. [2023-11-17 15:08:55,841 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 115 transitions, 234 flow [2023-11-17 15:08:55,844 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 115 transitions, 234 flow [2023-11-17 15:08:55,848 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:08:55,856 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 115 transitions, 234 flow [2023-11-17 15:08:55,859 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 115 transitions, 234 flow [2023-11-17 15:08:55,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 115 transitions, 234 flow [2023-11-17 15:08:55,920 INFO L124 PetriNetUnfolderBase]: 11/126 cut-off events. [2023-11-17 15:08:55,920 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:08:55,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 126 events. 11/126 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 136 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 92. Up to 4 conditions per place. [2023-11-17 15:08:55,923 INFO L119 LiptonReduction]: Number of co-enabled transitions 2212 [2023-11-17 15:08:58,969 INFO L134 LiptonReduction]: Checked pairs total: 2713 [2023-11-17 15:08:58,970 INFO L136 LiptonReduction]: Total number of compositions: 108 [2023-11-17 15:08:59,001 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:08:59,007 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;@6518fc7c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:08:59,007 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 15:08:59,015 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:08:59,015 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2023-11-17 15:08:59,015 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:08:59,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:08:59,016 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:08:59,016 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:08:59,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:08:59,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1646911552, now seen corresponding path program 1 times [2023-11-17 15:08:59,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:08:59,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164659204] [2023-11-17 15:08:59,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:08:59,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:08:59,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:08:59,156 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:08:59,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:08:59,179 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:08:59,180 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:08:59,181 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 15:08:59,182 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 15:08:59,182 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 15:08:59,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:08:59,183 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-17 15:08:59,185 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:08:59,185 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:08:59,219 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:08:59,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 195 transitions, 400 flow [2023-11-17 15:08:59,244 INFO L124 PetriNetUnfolderBase]: 21/219 cut-off events. [2023-11-17 15:08:59,244 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:08:59,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 219 events. 21/219 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 438 event pairs, 0 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 171. Up to 6 conditions per place. [2023-11-17 15:08:59,246 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 195 transitions, 400 flow [2023-11-17 15:08:59,247 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 195 transitions, 400 flow [2023-11-17 15:08:59,247 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:08:59,248 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 181 places, 195 transitions, 400 flow [2023-11-17 15:08:59,248 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 181 places, 195 transitions, 400 flow [2023-11-17 15:08:59,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 195 transitions, 400 flow [2023-11-17 15:08:59,266 INFO L124 PetriNetUnfolderBase]: 21/219 cut-off events. [2023-11-17 15:08:59,266 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:08:59,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 219 events. 21/219 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 438 event pairs, 0 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 171. Up to 6 conditions per place. [2023-11-17 15:08:59,273 INFO L119 LiptonReduction]: Number of co-enabled transitions 17064 [2023-11-17 15:09:03,177 INFO L134 LiptonReduction]: Checked pairs total: 31233 [2023-11-17 15:09:03,177 INFO L136 LiptonReduction]: Total number of compositions: 166 [2023-11-17 15:09:03,179 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:09:03,180 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;@6518fc7c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:09:03,180 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 15:09:03,183 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:09:03,183 INFO L124 PetriNetUnfolderBase]: 4/35 cut-off events. [2023-11-17 15:09:03,183 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:09:03,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:03,183 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:09:03,183 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:09:03,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:03,183 INFO L85 PathProgramCache]: Analyzing trace with hash -720926305, now seen corresponding path program 1 times [2023-11-17 15:09:03,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:03,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074579271] [2023-11-17 15:09:03,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:03,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:03,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:09:03,199 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:09:03,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:09:03,219 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:09:03,219 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:09:03,220 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 15:09:03,220 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 15:09:03,220 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 15:09:03,220 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 15:09:03,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:09:03,220 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-17 15:09:03,221 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:09:03,221 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:09:03,254 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:09:03,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 254 places, 275 transitions, 568 flow [2023-11-17 15:09:03,284 INFO L124 PetriNetUnfolderBase]: 31/312 cut-off events. [2023-11-17 15:09:03,284 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:09:03,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 312 events. 31/312 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 863 event pairs, 0 based on Foata normal form. 0/274 useless extension candidates. Maximal degree in co-relation 250. Up to 8 conditions per place. [2023-11-17 15:09:03,288 INFO L82 GeneralOperation]: Start removeDead. Operand has 254 places, 275 transitions, 568 flow [2023-11-17 15:09:03,290 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 254 places, 275 transitions, 568 flow [2023-11-17 15:09:03,290 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:09:03,290 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 254 places, 275 transitions, 568 flow [2023-11-17 15:09:03,291 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 254 places, 275 transitions, 568 flow [2023-11-17 15:09:03,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 254 places, 275 transitions, 568 flow [2023-11-17 15:09:03,321 INFO L124 PetriNetUnfolderBase]: 31/312 cut-off events. [2023-11-17 15:09:03,321 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:09:03,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 312 events. 31/312 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 863 event pairs, 0 based on Foata normal form. 0/274 useless extension candidates. Maximal degree in co-relation 250. Up to 8 conditions per place. [2023-11-17 15:09:03,337 INFO L119 LiptonReduction]: Number of co-enabled transitions 44556 [2023-11-17 15:09:08,535 INFO L134 LiptonReduction]: Checked pairs total: 83429 [2023-11-17 15:09:08,535 INFO L136 LiptonReduction]: Total number of compositions: 238 [2023-11-17 15:09:08,538 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:09:08,538 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;@6518fc7c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:09:08,538 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 15:09:08,543 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:09:08,544 INFO L124 PetriNetUnfolderBase]: 7/50 cut-off events. [2023-11-17 15:09:08,544 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 15:09:08,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:08,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:09:08,544 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:09:08,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:08,546 INFO L85 PathProgramCache]: Analyzing trace with hash 577783014, now seen corresponding path program 1 times [2023-11-17 15:09:08,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:08,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86865447] [2023-11-17 15:09:08,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:08,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:08,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:09:08,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:09:08,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:09:08,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86865447] [2023-11-17 15:09:08,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86865447] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:09:08,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:09:08,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:09:08,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677784747] [2023-11-17 15:09:08,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:09:08,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:09:08,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:09:08,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:09:08,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:09:08,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 513 [2023-11-17 15:09:08,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 94 transitions, 206 flow. Second operand has 4 states, 4 states have (on average 219.25) internal successors, (877), 4 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:08,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:09:08,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 513 [2023-11-17 15:09:08,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:09:13,802 INFO L124 PetriNetUnfolderBase]: 49695/70903 cut-off events. [2023-11-17 15:09:13,802 INFO L125 PetriNetUnfolderBase]: For 2452/2452 co-relation queries the response was YES. [2023-11-17 15:09:13,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138749 conditions, 70903 events. 49695/70903 cut-off events. For 2452/2452 co-relation queries the response was YES. Maximal size of possible extension queue 2390. Compared 499952 event pairs, 19288 based on Foata normal form. 822/56856 useless extension candidates. Maximal degree in co-relation 66290. Up to 47694 conditions per place. [2023-11-17 15:09:14,224 INFO L140 encePairwiseOnDemand]: 494/513 looper letters, 206 selfloop transitions, 13 changer transitions 0/233 dead transitions. [2023-11-17 15:09:14,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 233 transitions, 953 flow [2023-11-17 15:09:14,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 15:09:14,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 15:09:14,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1329 transitions. [2023-11-17 15:09:14,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5181286549707602 [2023-11-17 15:09:14,237 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1329 transitions. [2023-11-17 15:09:14,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1329 transitions. [2023-11-17 15:09:14,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:09:14,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1329 transitions. [2023-11-17 15:09:14,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 265.8) internal successors, (1329), 5 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:14,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 513.0) internal successors, (3078), 6 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:14,252 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 513.0) internal successors, (3078), 6 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:14,254 INFO L175 Difference]: Start difference. First operand has 80 places, 94 transitions, 206 flow. Second operand 5 states and 1329 transitions. [2023-11-17 15:09:14,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 233 transitions, 953 flow [2023-11-17 15:09:14,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 233 transitions, 945 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-11-17 15:09:14,261 INFO L231 Difference]: Finished difference. Result has 87 places, 98 transitions, 300 flow [2023-11-17 15:09:14,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=513, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=300, PETRI_PLACES=87, PETRI_TRANSITIONS=98} [2023-11-17 15:09:14,265 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 7 predicate places. [2023-11-17 15:09:14,265 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 98 transitions, 300 flow [2023-11-17 15:09:14,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 219.25) internal successors, (877), 4 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:14,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:14,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:09:14,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:09:14,266 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:09:14,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:14,266 INFO L85 PathProgramCache]: Analyzing trace with hash -66115269, now seen corresponding path program 1 times [2023-11-17 15:09:14,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:14,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319299719] [2023-11-17 15:09:14,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:14,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:14,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:09:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:09:14,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:09:14,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319299719] [2023-11-17 15:09:14,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319299719] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:09:14,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:09:14,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:09:14,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675289965] [2023-11-17 15:09:14,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:09:14,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:09:14,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:09:14,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:09:14,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:09:14,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 513 [2023-11-17 15:09:14,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 98 transitions, 300 flow. Second operand has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:14,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:09:14,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 513 [2023-11-17 15:09:14,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:09:20,714 INFO L124 PetriNetUnfolderBase]: 65889/91817 cut-off events. [2023-11-17 15:09:20,714 INFO L125 PetriNetUnfolderBase]: For 29909/30013 co-relation queries the response was YES. [2023-11-17 15:09:20,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202232 conditions, 91817 events. 65889/91817 cut-off events. For 29909/30013 co-relation queries the response was YES. Maximal size of possible extension queue 3525. Compared 655465 event pairs, 14031 based on Foata normal form. 1152/75834 useless extension candidates. Maximal degree in co-relation 104959. Up to 75041 conditions per place. [2023-11-17 15:09:21,484 INFO L140 encePairwiseOnDemand]: 506/513 looper letters, 113 selfloop transitions, 4 changer transitions 0/139 dead transitions. [2023-11-17 15:09:21,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 139 transitions, 674 flow [2023-11-17 15:09:21,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:09:21,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:09:21,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 764 transitions. [2023-11-17 15:09:21,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4964262508122157 [2023-11-17 15:09:21,488 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 764 transitions. [2023-11-17 15:09:21,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 764 transitions. [2023-11-17 15:09:21,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:09:21,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 764 transitions. [2023-11-17 15:09:21,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:21,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 513.0) internal successors, (2052), 4 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:21,493 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 513.0) internal successors, (2052), 4 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:21,493 INFO L175 Difference]: Start difference. First operand has 87 places, 98 transitions, 300 flow. Second operand 3 states and 764 transitions. [2023-11-17 15:09:21,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 139 transitions, 674 flow [2023-11-17 15:09:21,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 139 transitions, 674 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:09:21,510 INFO L231 Difference]: Finished difference. Result has 90 places, 101 transitions, 330 flow [2023-11-17 15:09:21,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=513, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=330, PETRI_PLACES=90, PETRI_TRANSITIONS=101} [2023-11-17 15:09:21,511 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 10 predicate places. [2023-11-17 15:09:21,511 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 101 transitions, 330 flow [2023-11-17 15:09:21,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:21,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:21,512 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:09:21,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:09:21,512 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:09:21,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:21,512 INFO L85 PathProgramCache]: Analyzing trace with hash -297812505, now seen corresponding path program 1 times [2023-11-17 15:09:21,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:21,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478746499] [2023-11-17 15:09:21,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:21,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:21,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:09:21,532 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:09:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:09:21,554 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:09:21,555 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:09:21,555 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 15:09:21,555 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 15:09:21,555 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 15:09:21,555 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 15:09:21,555 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 15:09:21,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:09:21,555 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:09:21,556 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:09:21,556 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:09:21,610 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:09:21,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 327 places, 355 transitions, 738 flow [2023-11-17 15:09:21,656 INFO L124 PetriNetUnfolderBase]: 41/405 cut-off events. [2023-11-17 15:09:21,657 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:09:21,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 424 conditions, 405 events. 41/405 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1326 event pairs, 0 based on Foata normal form. 0/355 useless extension candidates. Maximal degree in co-relation 329. Up to 10 conditions per place. [2023-11-17 15:09:21,663 INFO L82 GeneralOperation]: Start removeDead. Operand has 327 places, 355 transitions, 738 flow [2023-11-17 15:09:21,666 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 327 places, 355 transitions, 738 flow [2023-11-17 15:09:21,667 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:09:21,667 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 327 places, 355 transitions, 738 flow [2023-11-17 15:09:21,667 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 327 places, 355 transitions, 738 flow [2023-11-17 15:09:21,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 327 places, 355 transitions, 738 flow [2023-11-17 15:09:21,710 INFO L124 PetriNetUnfolderBase]: 41/405 cut-off events. [2023-11-17 15:09:21,710 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:09:21,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 424 conditions, 405 events. 41/405 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1326 event pairs, 0 based on Foata normal form. 0/355 useless extension candidates. Maximal degree in co-relation 329. Up to 10 conditions per place. [2023-11-17 15:09:21,730 INFO L119 LiptonReduction]: Number of co-enabled transitions 84688 [2023-11-17 15:09:42,153 INFO L134 LiptonReduction]: Checked pairs total: 172070 [2023-11-17 15:09:42,153 INFO L136 LiptonReduction]: Total number of compositions: 310 [2023-11-17 15:09:42,167 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:09:42,172 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;@6518fc7c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:09:42,172 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 15:09:42,176 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:09:42,177 INFO L124 PetriNetUnfolderBase]: 7/55 cut-off events. [2023-11-17 15:09:42,177 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 15:09:42,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:42,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:09:42,185 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:09:42,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:42,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1914524313, now seen corresponding path program 1 times [2023-11-17 15:09:42,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:42,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575047059] [2023-11-17 15:09:42,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:42,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:42,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:09:42,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:09:42,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:09:42,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575047059] [2023-11-17 15:09:42,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575047059] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:09:42,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:09:42,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:09:42,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385690724] [2023-11-17 15:09:42,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:09:42,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:09:42,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:09:42,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:09:42,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:09:42,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 665 [2023-11-17 15:09:42,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 122 transitions, 272 flow. Second operand has 4 states, 4 states have (on average 282.25) internal successors, (1129), 4 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:42,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:09:42,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 665 [2023-11-17 15:09:42,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand