/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/weaver/chl-array-int-trans.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:52:06,703 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:52:06,794 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 11:52:06,830 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:52:06,831 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:52:06,832 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:52:06,834 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:52:06,834 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:52:06,835 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:52:06,838 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:52:06,840 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:52:06,840 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:52:06,840 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:52:06,842 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:52:06,842 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:52:06,842 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:52:06,842 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:52:06,843 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:52:06,843 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:52:06,843 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:52:06,843 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:52:06,844 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:52:06,845 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:52:06,845 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:52:06,845 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:52:06,845 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:52:06,846 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:52:06,846 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:52:06,846 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:52:06,846 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:52:06,847 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:52:06,848 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:52:06,848 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:52:07,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:52:07,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:52:07,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:52:07,100 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:52:07,101 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:52:07,102 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c [2023-11-17 11:52:08,260 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:52:08,538 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:52:08,538 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c [2023-11-17 11:52:08,545 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c7091b4a/f50cf7ad54fa49329ae26d3d09c50f15/FLAG3748f04f9 [2023-11-17 11:52:08,557 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c7091b4a/f50cf7ad54fa49329ae26d3d09c50f15 [2023-11-17 11:52:08,559 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:52:08,560 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:52:08,561 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:52:08,562 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:52:08,565 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:52:08,566 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:52:08" (1/1) ... [2023-11-17 11:52:08,567 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cd671b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:08, skipping insertion in model container [2023-11-17 11:52:08,567 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:52:08" (1/1) ... [2023-11-17 11:52:08,591 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:52:08,783 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c[2767,2780] [2023-11-17 11:52:08,794 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:52:08,810 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:52:08,833 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c[2767,2780] [2023-11-17 11:52:08,839 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:52:08,852 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:52:08,852 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:08 WrapperNode [2023-11-17 11:52:08,852 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:52:08,853 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:52:08,854 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:52:08,854 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:52:08,860 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:08" (1/1) ... [2023-11-17 11:52:08,868 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:08" (1/1) ... [2023-11-17 11:52:08,899 INFO L138 Inliner]: procedures = 26, calls = 49, calls flagged for inlining = 13, calls inlined = 21, statements flattened = 288 [2023-11-17 11:52:08,899 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:52:08,900 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:52:08,900 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:52:08,900 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:52:08,913 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:08" (1/1) ... [2023-11-17 11:52:08,914 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:08" (1/1) ... [2023-11-17 11:52:08,918 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:08" (1/1) ... [2023-11-17 11:52:08,919 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:08" (1/1) ... [2023-11-17 11:52:08,928 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:08" (1/1) ... [2023-11-17 11:52:08,933 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:08" (1/1) ... [2023-11-17 11:52:08,935 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:08" (1/1) ... [2023-11-17 11:52:08,937 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:08" (1/1) ... [2023-11-17 11:52:08,941 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:52:08,942 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:52:08,943 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:52:08,943 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:52:08,943 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:08" (1/1) ... [2023-11-17 11:52:08,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:52:08,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:52:08,978 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 11:52:08,993 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 11:52:09,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:52:09,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:52:09,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:52:09,018 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:52:09,019 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 11:52:09,019 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 11:52:09,019 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 11:52:09,020 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 11:52:09,020 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 11:52:09,020 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 11:52:09,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:52:09,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 11:52:09,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:52:09,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:52:09,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:52:09,023 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 11:52:09,129 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:52:09,131 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:52:09,542 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:52:09,930 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:52:09,930 INFO L307 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-17 11:52:09,932 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:52:09 BoogieIcfgContainer [2023-11-17 11:52:09,933 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:52:09,937 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:52:09,937 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:52:09,940 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:52:09,940 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:52:08" (1/3) ... [2023-11-17 11:52:09,941 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27702d5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:52:09, skipping insertion in model container [2023-11-17 11:52:09,941 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:08" (2/3) ... [2023-11-17 11:52:09,941 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27702d5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:52:09, skipping insertion in model container [2023-11-17 11:52:09,942 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:52:09" (3/3) ... [2023-11-17 11:52:09,943 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-trans.wvr.c [2023-11-17 11:52:09,962 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:52:09,963 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:52:09,963 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:52:10,022 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 11:52:10,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 42 transitions, 105 flow [2023-11-17 11:52:10,109 INFO L124 PetriNetUnfolderBase]: 9/39 cut-off events. [2023-11-17 11:52:10,110 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 11:52:10,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 39 events. 9/39 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 33 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2023-11-17 11:52:10,117 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 42 transitions, 105 flow [2023-11-17 11:52:10,123 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 38 transitions, 94 flow [2023-11-17 11:52:10,138 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:52:10,154 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 39 places, 38 transitions, 94 flow [2023-11-17 11:52:10,158 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 39 places, 38 transitions, 94 flow [2023-11-17 11:52:10,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 38 transitions, 94 flow [2023-11-17 11:52:10,178 INFO L124 PetriNetUnfolderBase]: 9/38 cut-off events. [2023-11-17 11:52:10,179 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 11:52:10,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 38 events. 9/38 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 32 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2023-11-17 11:52:10,180 INFO L119 LiptonReduction]: Number of co-enabled transitions 396 [2023-11-17 11:52:11,084 INFO L134 LiptonReduction]: Checked pairs total: 617 [2023-11-17 11:52:11,084 INFO L136 LiptonReduction]: Total number of compositions: 12 [2023-11-17 11:52:11,108 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:52:11,116 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;@283a3d47, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:52:11,116 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 11:52:11,161 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:52:11,161 INFO L124 PetriNetUnfolderBase]: 8/31 cut-off events. [2023-11-17 11:52:11,161 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 11:52:11,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:11,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:11,163 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:52:11,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:11,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1404351407, now seen corresponding path program 1 times [2023-11-17 11:52:11,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:11,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211903516] [2023-11-17 11:52:11,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:11,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:11,816 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 11:52:11,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:11,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211903516] [2023-11-17 11:52:11,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211903516] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:52:11,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:52:11,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 11:52:11,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687305848] [2023-11-17 11:52:11,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:52:11,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:52:11,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:11,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:52:11,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:52:11,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 54 [2023-11-17 11:52:11,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 82 flow. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 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 11:52:11,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:11,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 54 [2023-11-17 11:52:11,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:12,434 INFO L124 PetriNetUnfolderBase]: 1262/1769 cut-off events. [2023-11-17 11:52:12,435 INFO L125 PetriNetUnfolderBase]: For 165/165 co-relation queries the response was YES. [2023-11-17 11:52:12,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3716 conditions, 1769 events. 1262/1769 cut-off events. For 165/165 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6743 event pairs, 88 based on Foata normal form. 1/1212 useless extension candidates. Maximal degree in co-relation 2265. Up to 594 conditions per place. [2023-11-17 11:52:12,455 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 105 selfloop transitions, 13 changer transitions 3/121 dead transitions. [2023-11-17 11:52:12,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 121 transitions, 559 flow [2023-11-17 11:52:12,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 11:52:12,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 11:52:12,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2023-11-17 11:52:12,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32510288065843623 [2023-11-17 11:52:12,472 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 158 transitions. [2023-11-17 11:52:12,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 158 transitions. [2023-11-17 11:52:12,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:12,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 158 transitions. [2023-11-17 11:52:12,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 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 11:52:12,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 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 11:52:12,488 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 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 11:52:12,490 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 82 flow. Second operand 9 states and 158 transitions. [2023-11-17 11:52:12,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 121 transitions, 559 flow [2023-11-17 11:52:12,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 121 transitions, 509 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-17 11:52:12,501 INFO L231 Difference]: Finished difference. Result has 39 places, 45 transitions, 148 flow [2023-11-17 11:52:12,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=148, PETRI_PLACES=39, PETRI_TRANSITIONS=45} [2023-11-17 11:52:12,506 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 5 predicate places. [2023-11-17 11:52:12,507 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 45 transitions, 148 flow [2023-11-17 11:52:12,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 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 11:52:12,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:12,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:12,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:52:12,508 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:52:12,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:12,513 INFO L85 PathProgramCache]: Analyzing trace with hash 190967129, now seen corresponding path program 2 times [2023-11-17 11:52:12,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:12,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045160889] [2023-11-17 11:52:12,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:12,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:12,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:12,714 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 11:52:12,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:12,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045160889] [2023-11-17 11:52:12,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045160889] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:52:12,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:52:12,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 11:52:12,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441265433] [2023-11-17 11:52:12,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:52:12,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:52:12,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:12,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:52:12,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:52:12,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 54 [2023-11-17 11:52:12,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 45 transitions, 148 flow. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 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 11:52:12,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:12,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 54 [2023-11-17 11:52:12,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:13,171 INFO L124 PetriNetUnfolderBase]: 1341/1915 cut-off events. [2023-11-17 11:52:13,172 INFO L125 PetriNetUnfolderBase]: For 272/272 co-relation queries the response was YES. [2023-11-17 11:52:13,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4351 conditions, 1915 events. 1341/1915 cut-off events. For 272/272 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 7659 event pairs, 92 based on Foata normal form. 1/1327 useless extension candidates. Maximal degree in co-relation 2939. Up to 594 conditions per place. [2023-11-17 11:52:13,185 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 103 selfloop transitions, 15 changer transitions 3/121 dead transitions. [2023-11-17 11:52:13,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 121 transitions, 572 flow [2023-11-17 11:52:13,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 11:52:13,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 11:52:13,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2023-11-17 11:52:13,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32098765432098764 [2023-11-17 11:52:13,187 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 156 transitions. [2023-11-17 11:52:13,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 156 transitions. [2023-11-17 11:52:13,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:13,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 156 transitions. [2023-11-17 11:52:13,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 17.333333333333332) internal successors, (156), 9 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:13,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 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 11:52:13,190 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 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 11:52:13,190 INFO L175 Difference]: Start difference. First operand has 39 places, 45 transitions, 148 flow. Second operand 9 states and 156 transitions. [2023-11-17 11:52:13,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 121 transitions, 572 flow [2023-11-17 11:52:13,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 121 transitions, 570 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-17 11:52:13,194 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 210 flow [2023-11-17 11:52:13,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=210, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2023-11-17 11:52:13,195 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 15 predicate places. [2023-11-17 11:52:13,195 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 210 flow [2023-11-17 11:52:13,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 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 11:52:13,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:13,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:13,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:52:13,196 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:52:13,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:13,197 INFO L85 PathProgramCache]: Analyzing trace with hash -699116938, now seen corresponding path program 1 times [2023-11-17 11:52:13,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:13,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923585366] [2023-11-17 11:52:13,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:13,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:13,354 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 11:52:13,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:13,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923585366] [2023-11-17 11:52:13,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923585366] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:52:13,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:52:13,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 11:52:13,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484379613] [2023-11-17 11:52:13,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:52:13,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:52:13,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:13,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:52:13,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:52:13,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 54 [2023-11-17 11:52:13,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 210 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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 11:52:13,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:13,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 54 [2023-11-17 11:52:13,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:13,625 INFO L124 PetriNetUnfolderBase]: 920/1340 cut-off events. [2023-11-17 11:52:13,625 INFO L125 PetriNetUnfolderBase]: For 732/732 co-relation queries the response was YES. [2023-11-17 11:52:13,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3298 conditions, 1340 events. 920/1340 cut-off events. For 732/732 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4924 event pairs, 323 based on Foata normal form. 0/983 useless extension candidates. Maximal degree in co-relation 2635. Up to 622 conditions per place. [2023-11-17 11:52:13,634 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 70 selfloop transitions, 6 changer transitions 2/78 dead transitions. [2023-11-17 11:52:13,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 78 transitions, 418 flow [2023-11-17 11:52:13,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 11:52:13,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 11:52:13,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2023-11-17 11:52:13,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35185185185185186 [2023-11-17 11:52:13,635 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 95 transitions. [2023-11-17 11:52:13,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 95 transitions. [2023-11-17 11:52:13,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:13,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 95 transitions. [2023-11-17 11:52:13,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 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 11:52:13,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 54.0) internal successors, (324), 6 states have internal predecessors, (324), 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 11:52:13,637 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 54.0) internal successors, (324), 6 states have internal predecessors, (324), 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 11:52:13,638 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 210 flow. Second operand 5 states and 95 transitions. [2023-11-17 11:52:13,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 78 transitions, 418 flow [2023-11-17 11:52:13,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 78 transitions, 405 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-17 11:52:13,643 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 190 flow [2023-11-17 11:52:13,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=190, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2023-11-17 11:52:13,644 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 16 predicate places. [2023-11-17 11:52:13,644 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 190 flow [2023-11-17 11:52:13,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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 11:52:13,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:13,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:13,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:52:13,645 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:52:13,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:13,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1422474484, now seen corresponding path program 1 times [2023-11-17 11:52:13,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:13,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637233133] [2023-11-17 11:52:13,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:13,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:13,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:13,746 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 11:52:13,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:13,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637233133] [2023-11-17 11:52:13,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637233133] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:52:13,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:52:13,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 11:52:13,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274569313] [2023-11-17 11:52:13,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:52:13,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:52:13,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:13,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:52:13,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:52:13,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 54 [2023-11-17 11:52:13,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 190 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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 11:52:13,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:13,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 54 [2023-11-17 11:52:13,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:14,081 INFO L124 PetriNetUnfolderBase]: 1419/2127 cut-off events. [2023-11-17 11:52:14,081 INFO L125 PetriNetUnfolderBase]: For 1587/1587 co-relation queries the response was YES. [2023-11-17 11:52:14,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5311 conditions, 2127 events. 1419/2127 cut-off events. For 1587/1587 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9104 event pairs, 648 based on Foata normal form. 0/1704 useless extension candidates. Maximal degree in co-relation 4302. Up to 1341 conditions per place. [2023-11-17 11:52:14,093 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 77 selfloop transitions, 6 changer transitions 4/87 dead transitions. [2023-11-17 11:52:14,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 87 transitions, 507 flow [2023-11-17 11:52:14,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 11:52:14,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 11:52:14,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2023-11-17 11:52:14,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.337037037037037 [2023-11-17 11:52:14,094 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 91 transitions. [2023-11-17 11:52:14,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 91 transitions. [2023-11-17 11:52:14,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:14,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 91 transitions. [2023-11-17 11:52:14,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 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 11:52:14,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 54.0) internal successors, (324), 6 states have internal predecessors, (324), 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 11:52:14,096 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 54.0) internal successors, (324), 6 states have internal predecessors, (324), 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 11:52:14,096 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 190 flow. Second operand 5 states and 91 transitions. [2023-11-17 11:52:14,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 87 transitions, 507 flow [2023-11-17 11:52:14,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 87 transitions, 496 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-17 11:52:14,103 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 231 flow [2023-11-17 11:52:14,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=231, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2023-11-17 11:52:14,104 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 20 predicate places. [2023-11-17 11:52:14,104 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 231 flow [2023-11-17 11:52:14,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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 11:52:14,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:14,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:14,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:52:14,105 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:52:14,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:14,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1208733470, now seen corresponding path program 1 times [2023-11-17 11:52:14,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:14,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868561867] [2023-11-17 11:52:14,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:14,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:14,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:52:14,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:14,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868561867] [2023-11-17 11:52:14,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868561867] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:52:14,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:52:14,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 11:52:14,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741971630] [2023-11-17 11:52:14,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:52:14,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:52:14,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:14,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:52:14,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:52:14,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 54 [2023-11-17 11:52:14,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 231 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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 11:52:14,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:14,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 54 [2023-11-17 11:52:14,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:14,776 INFO L124 PetriNetUnfolderBase]: 2507/3729 cut-off events. [2023-11-17 11:52:14,776 INFO L125 PetriNetUnfolderBase]: For 2651/2651 co-relation queries the response was YES. [2023-11-17 11:52:14,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9994 conditions, 3729 events. 2507/3729 cut-off events. For 2651/2651 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 17647 event pairs, 883 based on Foata normal form. 2/3114 useless extension candidates. Maximal degree in co-relation 8576. Up to 1637 conditions per place. [2023-11-17 11:52:14,800 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 97 selfloop transitions, 17 changer transitions 7/121 dead transitions. [2023-11-17 11:52:14,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 121 transitions, 757 flow [2023-11-17 11:52:14,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 11:52:14,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 11:52:14,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2023-11-17 11:52:14,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3201058201058201 [2023-11-17 11:52:14,805 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 121 transitions. [2023-11-17 11:52:14,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 121 transitions. [2023-11-17 11:52:14,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:14,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 121 transitions. [2023-11-17 11:52:14,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 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 11:52:14,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 54.0) internal successors, (432), 8 states have internal predecessors, (432), 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 11:52:14,807 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 54.0) internal successors, (432), 8 states have internal predecessors, (432), 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 11:52:14,807 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 231 flow. Second operand 7 states and 121 transitions. [2023-11-17 11:52:14,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 121 transitions, 757 flow [2023-11-17 11:52:14,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 121 transitions, 747 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-17 11:52:14,817 INFO L231 Difference]: Finished difference. Result has 63 places, 61 transitions, 385 flow [2023-11-17 11:52:14,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=385, PETRI_PLACES=63, PETRI_TRANSITIONS=61} [2023-11-17 11:52:14,818 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 29 predicate places. [2023-11-17 11:52:14,818 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 61 transitions, 385 flow [2023-11-17 11:52:14,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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 11:52:14,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:14,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:14,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:52:14,819 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:52:14,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:14,820 INFO L85 PathProgramCache]: Analyzing trace with hash -59214161, now seen corresponding path program 1 times [2023-11-17 11:52:14,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:14,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196669126] [2023-11-17 11:52:14,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:14,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:15,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:52:15,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:15,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196669126] [2023-11-17 11:52:15,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196669126] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:52:15,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:52:15,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-17 11:52:15,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783186225] [2023-11-17 11:52:15,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:52:15,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 11:52:15,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:15,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 11:52:15,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-17 11:52:15,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 54 [2023-11-17 11:52:15,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 385 flow. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 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 11:52:15,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:15,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 54 [2023-11-17 11:52:15,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:15,644 INFO L124 PetriNetUnfolderBase]: 2616/3933 cut-off events. [2023-11-17 11:52:15,644 INFO L125 PetriNetUnfolderBase]: For 3583/3583 co-relation queries the response was YES. [2023-11-17 11:52:15,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11034 conditions, 3933 events. 2616/3933 cut-off events. For 3583/3583 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 19321 event pairs, 797 based on Foata normal form. 4/3271 useless extension candidates. Maximal degree in co-relation 9317. Up to 1735 conditions per place. [2023-11-17 11:52:15,665 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 83 selfloop transitions, 5 changer transitions 54/142 dead transitions. [2023-11-17 11:52:15,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 142 transitions, 912 flow [2023-11-17 11:52:15,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 11:52:15,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 11:52:15,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2023-11-17 11:52:15,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34953703703703703 [2023-11-17 11:52:15,667 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 151 transitions. [2023-11-17 11:52:15,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 151 transitions. [2023-11-17 11:52:15,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:15,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 151 transitions. [2023-11-17 11:52:15,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:15,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 54.0) internal successors, (486), 9 states have internal predecessors, (486), 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 11:52:15,669 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 54.0) internal successors, (486), 9 states have internal predecessors, (486), 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 11:52:15,669 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 385 flow. Second operand 8 states and 151 transitions. [2023-11-17 11:52:15,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 142 transitions, 912 flow [2023-11-17 11:52:15,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 142 transitions, 893 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-17 11:52:15,682 INFO L231 Difference]: Finished difference. Result has 72 places, 56 transitions, 336 flow [2023-11-17 11:52:15,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=336, PETRI_PLACES=72, PETRI_TRANSITIONS=56} [2023-11-17 11:52:15,684 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 38 predicate places. [2023-11-17 11:52:15,685 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 56 transitions, 336 flow [2023-11-17 11:52:15,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 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 11:52:15,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:15,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:15,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:52:15,686 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:52:15,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:15,686 INFO L85 PathProgramCache]: Analyzing trace with hash 574962475, now seen corresponding path program 2 times [2023-11-17 11:52:15,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:15,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246352314] [2023-11-17 11:52:15,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:15,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:15,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:15,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:52:15,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:15,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246352314] [2023-11-17 11:52:15,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246352314] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:52:15,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:52:15,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-17 11:52:15,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654330899] [2023-11-17 11:52:15,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:52:15,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 11:52:15,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:15,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 11:52:15,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-17 11:52:15,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 54 [2023-11-17 11:52:15,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 56 transitions, 336 flow. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 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 11:52:15,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:15,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 54 [2023-11-17 11:52:15,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:16,468 INFO L124 PetriNetUnfolderBase]: 2404/3607 cut-off events. [2023-11-17 11:52:16,469 INFO L125 PetriNetUnfolderBase]: For 3852/3852 co-relation queries the response was YES. [2023-11-17 11:52:16,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10576 conditions, 3607 events. 2404/3607 cut-off events. For 3852/3852 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 17196 event pairs, 1019 based on Foata normal form. 2/3001 useless extension candidates. Maximal degree in co-relation 10506. Up to 1735 conditions per place. [2023-11-17 11:52:16,497 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 100 selfloop transitions, 7 changer transitions 24/131 dead transitions. [2023-11-17 11:52:16,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 131 transitions, 887 flow [2023-11-17 11:52:16,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 11:52:16,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 11:52:16,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2023-11-17 11:52:16,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35185185185185186 [2023-11-17 11:52:16,498 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 133 transitions. [2023-11-17 11:52:16,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 133 transitions. [2023-11-17 11:52:16,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:16,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 133 transitions. [2023-11-17 11:52:16,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 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 11:52:16,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 54.0) internal successors, (432), 8 states have internal predecessors, (432), 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 11:52:16,500 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 54.0) internal successors, (432), 8 states have internal predecessors, (432), 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 11:52:16,500 INFO L175 Difference]: Start difference. First operand has 72 places, 56 transitions, 336 flow. Second operand 7 states and 133 transitions. [2023-11-17 11:52:16,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 131 transitions, 887 flow [2023-11-17 11:52:16,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 131 transitions, 834 flow, removed 21 selfloop flow, removed 7 redundant places. [2023-11-17 11:52:16,516 INFO L231 Difference]: Finished difference. Result has 70 places, 58 transitions, 347 flow [2023-11-17 11:52:16,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=347, PETRI_PLACES=70, PETRI_TRANSITIONS=58} [2023-11-17 11:52:16,517 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 36 predicate places. [2023-11-17 11:52:16,517 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 58 transitions, 347 flow [2023-11-17 11:52:16,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 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 11:52:16,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:16,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:16,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 11:52:16,518 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:52:16,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:16,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1538600049, now seen corresponding path program 3 times [2023-11-17 11:52:16,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:16,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448913879] [2023-11-17 11:52:16,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:16,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:16,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:16,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:52:16,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:16,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448913879] [2023-11-17 11:52:16,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448913879] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:52:16,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:52:16,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-17 11:52:16,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57251752] [2023-11-17 11:52:16,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:52:16,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 11:52:16,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:16,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 11:52:16,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-17 11:52:16,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 54 [2023-11-17 11:52:16,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 58 transitions, 347 flow. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 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 11:52:16,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:16,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 54 [2023-11-17 11:52:16,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:17,404 INFO L124 PetriNetUnfolderBase]: 2596/3899 cut-off events. [2023-11-17 11:52:17,404 INFO L125 PetriNetUnfolderBase]: For 3605/3605 co-relation queries the response was YES. [2023-11-17 11:52:17,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11303 conditions, 3899 events. 2596/3899 cut-off events. For 3605/3605 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 18844 event pairs, 1077 based on Foata normal form. 4/3283 useless extension candidates. Maximal degree in co-relation 11258. Up to 1735 conditions per place. [2023-11-17 11:52:17,425 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 81 selfloop transitions, 6 changer transitions 53/140 dead transitions. [2023-11-17 11:52:17,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 140 transitions, 907 flow [2023-11-17 11:52:17,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 11:52:17,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 11:52:17,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2023-11-17 11:52:17,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3449074074074074 [2023-11-17 11:52:17,427 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 149 transitions. [2023-11-17 11:52:17,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 149 transitions. [2023-11-17 11:52:17,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:17,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 149 transitions. [2023-11-17 11:52:17,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 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 11:52:17,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 54.0) internal successors, (486), 9 states have internal predecessors, (486), 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 11:52:17,428 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 54.0) internal successors, (486), 9 states have internal predecessors, (486), 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 11:52:17,429 INFO L175 Difference]: Start difference. First operand has 70 places, 58 transitions, 347 flow. Second operand 8 states and 149 transitions. [2023-11-17 11:52:17,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 140 transitions, 907 flow [2023-11-17 11:52:17,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 140 transitions, 885 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-17 11:52:17,437 INFO L231 Difference]: Finished difference. Result has 75 places, 57 transitions, 347 flow [2023-11-17 11:52:17,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=347, PETRI_PLACES=75, PETRI_TRANSITIONS=57} [2023-11-17 11:52:17,438 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 41 predicate places. [2023-11-17 11:52:17,438 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 57 transitions, 347 flow [2023-11-17 11:52:17,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 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 11:52:17,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:17,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:17,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 11:52:17,439 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:52:17,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:17,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1815086090, now seen corresponding path program 1 times [2023-11-17 11:52:17,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:17,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837280600] [2023-11-17 11:52:17,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:17,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:17,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:52:17,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:17,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837280600] [2023-11-17 11:52:17,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837280600] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:52:17,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539323239] [2023-11-17 11:52:17,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:17,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:17,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:52:17,605 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:52:17,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 11:52:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:17,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 11:52:17,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:52:17,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:52:17,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:52:17,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:52:17,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539323239] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:52:17,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:52:17,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-17 11:52:17,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433290533] [2023-11-17 11:52:17,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:52:17,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 11:52:17,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:17,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 11:52:17,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-11-17 11:52:17,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 54 [2023-11-17 11:52:17,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 57 transitions, 347 flow. Second operand has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 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 11:52:17,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:17,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 54 [2023-11-17 11:52:17,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:19,092 INFO L124 PetriNetUnfolderBase]: 3477/5139 cut-off events. [2023-11-17 11:52:19,092 INFO L125 PetriNetUnfolderBase]: For 5303/5303 co-relation queries the response was YES. [2023-11-17 11:52:19,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14893 conditions, 5139 events. 3477/5139 cut-off events. For 5303/5303 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 25412 event pairs, 1439 based on Foata normal form. 5/4261 useless extension candidates. Maximal degree in co-relation 14835. Up to 1484 conditions per place. [2023-11-17 11:52:19,121 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 135 selfloop transitions, 17 changer transitions 72/224 dead transitions. [2023-11-17 11:52:19,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 224 transitions, 1488 flow [2023-11-17 11:52:19,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 11:52:19,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 11:52:19,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 265 transitions. [2023-11-17 11:52:19,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2726337448559671 [2023-11-17 11:52:19,123 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 265 transitions. [2023-11-17 11:52:19,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 265 transitions. [2023-11-17 11:52:19,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:19,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 265 transitions. [2023-11-17 11:52:19,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 14.722222222222221) internal successors, (265), 18 states have internal predecessors, (265), 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 11:52:19,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 54.0) internal successors, (1026), 19 states have internal predecessors, (1026), 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 11:52:19,126 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 54.0) internal successors, (1026), 19 states have internal predecessors, (1026), 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 11:52:19,126 INFO L175 Difference]: Start difference. First operand has 75 places, 57 transitions, 347 flow. Second operand 18 states and 265 transitions. [2023-11-17 11:52:19,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 224 transitions, 1488 flow [2023-11-17 11:52:19,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 224 transitions, 1446 flow, removed 12 selfloop flow, removed 7 redundant places. [2023-11-17 11:52:19,142 INFO L231 Difference]: Finished difference. Result has 92 places, 60 transitions, 390 flow [2023-11-17 11:52:19,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=390, PETRI_PLACES=92, PETRI_TRANSITIONS=60} [2023-11-17 11:52:19,142 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 58 predicate places. [2023-11-17 11:52:19,143 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 60 transitions, 390 flow [2023-11-17 11:52:19,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 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 11:52:19,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:19,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:19,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 11:52:19,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:19,350 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:52:19,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:19,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1361424210, now seen corresponding path program 1 times [2023-11-17 11:52:19,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:19,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11528262] [2023-11-17 11:52:19,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:19,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:19,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:19,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:52:19,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:19,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11528262] [2023-11-17 11:52:19,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11528262] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:52:19,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:52:19,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 11:52:19,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263146361] [2023-11-17 11:52:19,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:52:19,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:52:19,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:19,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:52:19,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:52:19,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 54 [2023-11-17 11:52:19,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 60 transitions, 390 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 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 11:52:19,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:19,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 54 [2023-11-17 11:52:19,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:19,957 INFO L124 PetriNetUnfolderBase]: 2127/3119 cut-off events. [2023-11-17 11:52:19,957 INFO L125 PetriNetUnfolderBase]: For 3196/3196 co-relation queries the response was YES. [2023-11-17 11:52:19,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9051 conditions, 3119 events. 2127/3119 cut-off events. For 3196/3196 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13594 event pairs, 1043 based on Foata normal form. 76/2686 useless extension candidates. Maximal degree in co-relation 9021. Up to 2318 conditions per place. [2023-11-17 11:52:19,977 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 45 selfloop transitions, 4 changer transitions 45/94 dead transitions. [2023-11-17 11:52:19,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 94 transitions, 686 flow [2023-11-17 11:52:19,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 11:52:19,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 11:52:19,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2023-11-17 11:52:19,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2993827160493827 [2023-11-17 11:52:19,978 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 97 transitions. [2023-11-17 11:52:19,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 97 transitions. [2023-11-17 11:52:19,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:19,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 97 transitions. [2023-11-17 11:52:19,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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 11:52:19,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 54.0) internal successors, (378), 7 states have internal predecessors, (378), 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 11:52:19,980 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 54.0) internal successors, (378), 7 states have internal predecessors, (378), 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 11:52:19,980 INFO L175 Difference]: Start difference. First operand has 92 places, 60 transitions, 390 flow. Second operand 6 states and 97 transitions. [2023-11-17 11:52:19,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 94 transitions, 686 flow [2023-11-17 11:52:19,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 94 transitions, 605 flow, removed 33 selfloop flow, removed 12 redundant places. [2023-11-17 11:52:19,995 INFO L231 Difference]: Finished difference. Result has 70 places, 49 transitions, 254 flow [2023-11-17 11:52:19,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=254, PETRI_PLACES=70, PETRI_TRANSITIONS=49} [2023-11-17 11:52:19,997 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 36 predicate places. [2023-11-17 11:52:19,997 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 49 transitions, 254 flow [2023-11-17 11:52:19,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 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 11:52:19,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:19,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:19,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 11:52:19,998 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:52:19,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:19,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1882406021, now seen corresponding path program 1 times [2023-11-17 11:52:19,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:19,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336623237] [2023-11-17 11:52:19,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:19,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:20,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:20,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:52:20,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:20,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336623237] [2023-11-17 11:52:20,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336623237] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:52:20,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775540955] [2023-11-17 11:52:20,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:20,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:20,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:52:20,298 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:52:20,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 11:52:20,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:20,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 11:52:20,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:52:20,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:52:20,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:52:20,723 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:52:20,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 122 [2023-11-17 11:52:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:52:20,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775540955] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 11:52:20,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 11:52:20,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2023-11-17 11:52:20,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35661115] [2023-11-17 11:52:20,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:52:20,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 11:52:20,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:20,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 11:52:20,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2023-11-17 11:52:20,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 54 [2023-11-17 11:52:20,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 49 transitions, 254 flow. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 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 11:52:20,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:20,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 54 [2023-11-17 11:52:20,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:21,294 INFO L124 PetriNetUnfolderBase]: 1513/2239 cut-off events. [2023-11-17 11:52:21,294 INFO L125 PetriNetUnfolderBase]: For 2367/2367 co-relation queries the response was YES. [2023-11-17 11:52:21,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6112 conditions, 2239 events. 1513/2239 cut-off events. For 2367/2367 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9260 event pairs, 699 based on Foata normal form. 2/1807 useless extension candidates. Maximal degree in co-relation 6091. Up to 1407 conditions per place. [2023-11-17 11:52:21,304 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 40 selfloop transitions, 6 changer transitions 43/89 dead transitions. [2023-11-17 11:52:21,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 89 transitions, 582 flow [2023-11-17 11:52:21,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 11:52:21,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 11:52:21,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 97 transitions. [2023-11-17 11:52:21,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2566137566137566 [2023-11-17 11:52:21,305 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 97 transitions. [2023-11-17 11:52:21,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 97 transitions. [2023-11-17 11:52:21,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:21,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 97 transitions. [2023-11-17 11:52:21,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 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 11:52:21,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 54.0) internal successors, (432), 8 states have internal predecessors, (432), 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 11:52:21,306 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 54.0) internal successors, (432), 8 states have internal predecessors, (432), 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 11:52:21,307 INFO L175 Difference]: Start difference. First operand has 70 places, 49 transitions, 254 flow. Second operand 7 states and 97 transitions. [2023-11-17 11:52:21,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 89 transitions, 582 flow [2023-11-17 11:52:21,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 89 transitions, 538 flow, removed 7 selfloop flow, removed 8 redundant places. [2023-11-17 11:52:21,311 INFO L231 Difference]: Finished difference. Result has 62 places, 46 transitions, 210 flow [2023-11-17 11:52:21,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=210, PETRI_PLACES=62, PETRI_TRANSITIONS=46} [2023-11-17 11:52:21,311 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 28 predicate places. [2023-11-17 11:52:21,312 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 46 transitions, 210 flow [2023-11-17 11:52:21,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 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 11:52:21,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:21,312 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:21,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 11:52:21,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-17 11:52:21,518 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:52:21,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:21,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1266687476, now seen corresponding path program 1 times [2023-11-17 11:52:21,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:21,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201948189] [2023-11-17 11:52:21,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:21,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:21,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:21,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:52:21,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:21,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201948189] [2023-11-17 11:52:21,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201948189] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:52:21,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775782273] [2023-11-17 11:52:21,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:21,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:21,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:52:21,769 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:52:21,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 11:52:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:21,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 11:52:21,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:52:22,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 11:52:22,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:52:22,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 11:52:22,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775782273] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:52:22,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:52:22,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 18 [2023-11-17 11:52:22,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423194694] [2023-11-17 11:52:22,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:52:22,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 11:52:22,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:22,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 11:52:22,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2023-11-17 11:52:22,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 54 [2023-11-17 11:52:22,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 46 transitions, 210 flow. Second operand has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 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 11:52:22,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:22,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 54 [2023-11-17 11:52:22,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:23,609 INFO L124 PetriNetUnfolderBase]: 4384/6252 cut-off events. [2023-11-17 11:52:23,609 INFO L125 PetriNetUnfolderBase]: For 3077/3077 co-relation queries the response was YES. [2023-11-17 11:52:23,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16218 conditions, 6252 events. 4384/6252 cut-off events. For 3077/3077 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 30883 event pairs, 120 based on Foata normal form. 6/5198 useless extension candidates. Maximal degree in co-relation 16200. Up to 952 conditions per place. [2023-11-17 11:52:23,657 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 256 selfloop transitions, 63 changer transitions 19/338 dead transitions. [2023-11-17 11:52:23,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 338 transitions, 1847 flow [2023-11-17 11:52:23,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-17 11:52:23,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-17 11:52:23,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 463 transitions. [2023-11-17 11:52:23,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25217864923747274 [2023-11-17 11:52:23,659 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 463 transitions. [2023-11-17 11:52:23,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 463 transitions. [2023-11-17 11:52:23,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:23,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 463 transitions. [2023-11-17 11:52:23,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 13.617647058823529) internal successors, (463), 34 states have internal predecessors, (463), 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 11:52:23,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 54.0) internal successors, (1890), 35 states have internal predecessors, (1890), 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 11:52:23,664 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 54.0) internal successors, (1890), 35 states have internal predecessors, (1890), 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 11:52:23,664 INFO L175 Difference]: Start difference. First operand has 62 places, 46 transitions, 210 flow. Second operand 34 states and 463 transitions. [2023-11-17 11:52:23,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 338 transitions, 1847 flow [2023-11-17 11:52:23,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 338 transitions, 1687 flow, removed 68 selfloop flow, removed 8 redundant places. [2023-11-17 11:52:23,720 INFO L231 Difference]: Finished difference. Result has 95 places, 101 transitions, 690 flow [2023-11-17 11:52:23,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=690, PETRI_PLACES=95, PETRI_TRANSITIONS=101} [2023-11-17 11:52:23,721 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 61 predicate places. [2023-11-17 11:52:23,721 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 101 transitions, 690 flow [2023-11-17 11:52:23,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 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 11:52:23,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:23,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:23,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-17 11:52:23,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:23,929 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:52:23,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:23,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1680248781, now seen corresponding path program 1 times [2023-11-17 11:52:23,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:23,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199590513] [2023-11-17 11:52:23,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:23,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:24,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:25,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:52:25,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:25,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199590513] [2023-11-17 11:52:25,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199590513] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:52:25,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058372468] [2023-11-17 11:52:25,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:25,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:25,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:52:25,314 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:52:25,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-17 11:52:25,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:25,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-17 11:52:25,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:52:25,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 11:52:25,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 11:52:25,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 11:52:25,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 11:52:26,236 INFO L349 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2023-11-17 11:52:26,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 40 [2023-11-17 11:52:26,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:52:26,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:52:27,520 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:52:27,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 75 [2023-11-17 11:52:27,584 INFO L349 Elim1Store]: treesize reduction 12, result has 64.7 percent of original size [2023-11-17 11:52:27,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 12459 treesize of output 11840 [2023-11-17 11:52:27,817 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:52:27,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2091 treesize of output 2051 [2023-11-17 11:52:27,898 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:52:27,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2027 treesize of output 1795 [2023-11-17 11:52:27,987 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:52:27,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1771 treesize of output 1667 [2023-11-17 11:52:42,176 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:52:42,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 75 [2023-11-17 11:52:42,223 INFO L349 Elim1Store]: treesize reduction 12, result has 64.7 percent of original size [2023-11-17 11:52:42,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 6219 treesize of output 5920 [2023-11-17 11:52:42,373 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:52:42,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2091 treesize of output 1859 [2023-11-17 11:52:42,442 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:52:42,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1835 treesize of output 1731 [2023-11-17 11:52:42,516 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:52:42,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1707 treesize of output 1667 [2023-11-17 11:53:17,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:53:17,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058372468] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:17,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:17,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 38 [2023-11-17 11:53:17,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889386882] [2023-11-17 11:53:17,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:17,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-17 11:53:17,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:17,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-17 11:53:17,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1339, Unknown=31, NotChecked=0, Total=1560 [2023-11-17 11:53:17,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 54 [2023-11-17 11:53:17,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 101 transitions, 690 flow. Second operand has 40 states, 40 states have (on average 5.925) internal successors, (237), 40 states have internal predecessors, (237), 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 11:53:17,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:17,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 54 [2023-11-17 11:53:17,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:21,963 INFO L124 PetriNetUnfolderBase]: 12920/18507 cut-off events. [2023-11-17 11:53:21,964 INFO L125 PetriNetUnfolderBase]: For 15077/15077 co-relation queries the response was YES. [2023-11-17 11:53:22,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45822 conditions, 18507 events. 12920/18507 cut-off events. For 15077/15077 co-relation queries the response was YES. Maximal size of possible extension queue 829. Compared 106766 event pairs, 1148 based on Foata normal form. 19/12016 useless extension candidates. Maximal degree in co-relation 45796. Up to 5355 conditions per place. [2023-11-17 11:53:22,094 INFO L140 encePairwiseOnDemand]: 38/54 looper letters, 430 selfloop transitions, 202 changer transitions 30/662 dead transitions. [2023-11-17 11:53:22,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 662 transitions, 5124 flow [2023-11-17 11:53:22,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-17 11:53:22,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-17 11:53:22,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 431 transitions. [2023-11-17 11:53:22,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2660493827160494 [2023-11-17 11:53:22,097 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 431 transitions. [2023-11-17 11:53:22,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 431 transitions. [2023-11-17 11:53:22,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:22,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 431 transitions. [2023-11-17 11:53:22,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 14.366666666666667) internal successors, (431), 30 states have internal predecessors, (431), 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 11:53:22,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 54.0) internal successors, (1674), 31 states have internal predecessors, (1674), 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 11:53:22,101 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 54.0) internal successors, (1674), 31 states have internal predecessors, (1674), 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 11:53:22,101 INFO L175 Difference]: Start difference. First operand has 95 places, 101 transitions, 690 flow. Second operand 30 states and 431 transitions. [2023-11-17 11:53:22,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 662 transitions, 5124 flow [2023-11-17 11:53:22,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 662 transitions, 4626 flow, removed 218 selfloop flow, removed 4 redundant places. [2023-11-17 11:53:22,206 INFO L231 Difference]: Finished difference. Result has 140 places, 320 transitions, 3068 flow [2023-11-17 11:53:22,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3068, PETRI_PLACES=140, PETRI_TRANSITIONS=320} [2023-11-17 11:53:22,208 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 106 predicate places. [2023-11-17 11:53:22,208 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 320 transitions, 3068 flow [2023-11-17 11:53:22,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 5.925) internal successors, (237), 40 states have internal predecessors, (237), 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 11:53:22,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:22,208 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:22,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-17 11:53:22,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:22,416 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:53:22,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:22,417 INFO L85 PathProgramCache]: Analyzing trace with hash 303614386, now seen corresponding path program 2 times [2023-11-17 11:53:22,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:22,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187282113] [2023-11-17 11:53:22,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:22,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:22,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:53:22,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:22,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187282113] [2023-11-17 11:53:22,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187282113] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:22,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375040243] [2023-11-17 11:53:22,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:53:22,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:22,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:22,665 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:53:22,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-17 11:53:22,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-17 11:53:22,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:22,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 11:53:22,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:22,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 11:53:22,914 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 11:53:22,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375040243] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:53:22,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 11:53:22,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-11-17 11:53:22,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862634426] [2023-11-17 11:53:22,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:53:22,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 11:53:22,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:22,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 11:53:22,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-11-17 11:53:22,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 54 [2023-11-17 11:53:22,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 320 transitions, 3068 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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 11:53:22,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:22,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 54 [2023-11-17 11:53:22,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:26,208 INFO L124 PetriNetUnfolderBase]: 16262/23309 cut-off events. [2023-11-17 11:53:26,209 INFO L125 PetriNetUnfolderBase]: For 76050/76050 co-relation queries the response was YES. [2023-11-17 11:53:26,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84670 conditions, 23309 events. 16262/23309 cut-off events. For 76050/76050 co-relation queries the response was YES. Maximal size of possible extension queue 1066. Compared 141209 event pairs, 2236 based on Foata normal form. 6/20591 useless extension candidates. Maximal degree in co-relation 84623. Up to 13584 conditions per place. [2023-11-17 11:53:26,472 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 312 selfloop transitions, 152 changer transitions 4/468 dead transitions. [2023-11-17 11:53:26,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 468 transitions, 5213 flow [2023-11-17 11:53:26,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 11:53:26,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 11:53:26,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2023-11-17 11:53:26,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2800925925925926 [2023-11-17 11:53:26,473 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 121 transitions. [2023-11-17 11:53:26,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 121 transitions. [2023-11-17 11:53:26,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:26,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 121 transitions. [2023-11-17 11:53:26,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 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 11:53:26,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 54.0) internal successors, (486), 9 states have internal predecessors, (486), 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 11:53:26,475 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 54.0) internal successors, (486), 9 states have internal predecessors, (486), 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 11:53:26,475 INFO L175 Difference]: Start difference. First operand has 140 places, 320 transitions, 3068 flow. Second operand 8 states and 121 transitions. [2023-11-17 11:53:26,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 468 transitions, 5213 flow [2023-11-17 11:53:26,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 468 transitions, 5131 flow, removed 30 selfloop flow, removed 5 redundant places. [2023-11-17 11:53:27,005 INFO L231 Difference]: Finished difference. Result has 144 places, 371 transitions, 4113 flow [2023-11-17 11:53:27,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3004, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4113, PETRI_PLACES=144, PETRI_TRANSITIONS=371} [2023-11-17 11:53:27,006 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 110 predicate places. [2023-11-17 11:53:27,006 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 371 transitions, 4113 flow [2023-11-17 11:53:27,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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 11:53:27,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:27,006 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:27,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-17 11:53:27,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-17 11:53:27,211 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:53:27,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:27,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1151050383, now seen corresponding path program 1 times [2023-11-17 11:53:27,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:27,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589790851] [2023-11-17 11:53:27,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:27,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:27,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:53:27,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:27,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589790851] [2023-11-17 11:53:27,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589790851] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:27,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779343351] [2023-11-17 11:53:27,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:27,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:27,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:27,406 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:53:27,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-17 11:53:27,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:27,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 11:53:27,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:27,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:53:27,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:27,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:53:27,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779343351] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:27,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 11:53:27,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 18 [2023-11-17 11:53:27,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560823433] [2023-11-17 11:53:27,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:53:27,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 11:53:27,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:27,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 11:53:27,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-11-17 11:53:27,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 54 [2023-11-17 11:53:27,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 371 transitions, 4113 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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 11:53:27,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:27,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 54 [2023-11-17 11:53:27,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:31,271 INFO L124 PetriNetUnfolderBase]: 15868/22618 cut-off events. [2023-11-17 11:53:31,272 INFO L125 PetriNetUnfolderBase]: For 103797/103797 co-relation queries the response was YES. [2023-11-17 11:53:31,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89942 conditions, 22618 events. 15868/22618 cut-off events. For 103797/103797 co-relation queries the response was YES. Maximal size of possible extension queue 986. Compared 133130 event pairs, 5016 based on Foata normal form. 780/21974 useless extension candidates. Maximal degree in co-relation 89893. Up to 12706 conditions per place. [2023-11-17 11:53:31,434 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 345 selfloop transitions, 75 changer transitions 0/420 dead transitions. [2023-11-17 11:53:31,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 420 transitions, 5374 flow [2023-11-17 11:53:31,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 11:53:31,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 11:53:31,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2023-11-17 11:53:31,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2222222222222222 [2023-11-17 11:53:31,435 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 84 transitions. [2023-11-17 11:53:31,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 84 transitions. [2023-11-17 11:53:31,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:31,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 84 transitions. [2023-11-17 11:53:31,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 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 11:53:31,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 54.0) internal successors, (432), 8 states have internal predecessors, (432), 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 11:53:31,436 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 54.0) internal successors, (432), 8 states have internal predecessors, (432), 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 11:53:31,436 INFO L175 Difference]: Start difference. First operand has 144 places, 371 transitions, 4113 flow. Second operand 7 states and 84 transitions. [2023-11-17 11:53:31,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 420 transitions, 5374 flow [2023-11-17 11:53:32,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 420 transitions, 5314 flow, removed 26 selfloop flow, removed 3 redundant places. [2023-11-17 11:53:32,018 INFO L231 Difference]: Finished difference. Result has 148 places, 368 transitions, 4298 flow [2023-11-17 11:53:32,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3995, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4298, PETRI_PLACES=148, PETRI_TRANSITIONS=368} [2023-11-17 11:53:32,019 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 114 predicate places. [2023-11-17 11:53:32,019 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 368 transitions, 4298 flow [2023-11-17 11:53:32,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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 11:53:32,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:32,019 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:32,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-17 11:53:32,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-17 11:53:32,221 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:53:32,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:32,221 INFO L85 PathProgramCache]: Analyzing trace with hash -45114234, now seen corresponding path program 1 times [2023-11-17 11:53:32,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:32,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226742572] [2023-11-17 11:53:32,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:32,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:32,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:32,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:53:32,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:32,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226742572] [2023-11-17 11:53:32,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226742572] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:32,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571695108] [2023-11-17 11:53:32,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:32,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:32,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:32,399 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:53:32,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-17 11:53:32,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:32,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 11:53:32,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:32,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:53:32,761 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:32,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:53:32,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571695108] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:32,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 11:53:32,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 18 [2023-11-17 11:53:32,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110311564] [2023-11-17 11:53:32,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:53:32,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 11:53:32,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:32,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 11:53:32,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-17 11:53:32,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 54 [2023-11-17 11:53:32,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 368 transitions, 4298 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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 11:53:32,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:32,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 54 [2023-11-17 11:53:32,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:37,584 INFO L124 PetriNetUnfolderBase]: 19712/27438 cut-off events. [2023-11-17 11:53:37,584 INFO L125 PetriNetUnfolderBase]: For 144608/144608 co-relation queries the response was YES. [2023-11-17 11:53:37,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118109 conditions, 27438 events. 19712/27438 cut-off events. For 144608/144608 co-relation queries the response was YES. Maximal size of possible extension queue 1097. Compared 156700 event pairs, 5380 based on Foata normal form. 0/26158 useless extension candidates. Maximal degree in co-relation 118059. Up to 14464 conditions per place. [2023-11-17 11:53:37,964 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 459 selfloop transitions, 52 changer transitions 0/511 dead transitions. [2023-11-17 11:53:37,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 511 transitions, 7039 flow [2023-11-17 11:53:37,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 11:53:37,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 11:53:37,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2023-11-17 11:53:37,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.21693121693121692 [2023-11-17 11:53:37,965 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 82 transitions. [2023-11-17 11:53:37,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 82 transitions. [2023-11-17 11:53:37,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:37,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 82 transitions. [2023-11-17 11:53:37,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:37,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 54.0) internal successors, (432), 8 states have internal predecessors, (432), 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 11:53:37,966 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 54.0) internal successors, (432), 8 states have internal predecessors, (432), 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 11:53:37,966 INFO L175 Difference]: Start difference. First operand has 148 places, 368 transitions, 4298 flow. Second operand 7 states and 82 transitions. [2023-11-17 11:53:37,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 511 transitions, 7039 flow [2023-11-17 11:53:38,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 511 transitions, 7010 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-11-17 11:53:38,825 INFO L231 Difference]: Finished difference. Result has 152 places, 370 transitions, 4479 flow [2023-11-17 11:53:38,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=4277, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4479, PETRI_PLACES=152, PETRI_TRANSITIONS=370} [2023-11-17 11:53:38,826 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 118 predicate places. [2023-11-17 11:53:38,826 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 370 transitions, 4479 flow [2023-11-17 11:53:38,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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 11:53:38,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:38,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:38,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-17 11:53:39,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:39,033 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:53:39,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:39,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1577911595, now seen corresponding path program 2 times [2023-11-17 11:53:39,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:39,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706280366] [2023-11-17 11:53:39,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:39,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:39,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:53:39,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:39,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706280366] [2023-11-17 11:53:39,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706280366] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:39,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391687379] [2023-11-17 11:53:39,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:53:39,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:39,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:39,903 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:53:39,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-17 11:53:40,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-17 11:53:40,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:40,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 11:53:40,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:40,770 INFO L349 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2023-11-17 11:53:40,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 40 [2023-11-17 11:53:40,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 11:53:40,819 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 11:53:40,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391687379] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:53:40,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 11:53:40,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 24 [2023-11-17 11:53:40,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018104711] [2023-11-17 11:53:40,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:53:40,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 11:53:40,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:40,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 11:53:40,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2023-11-17 11:53:40,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 54 [2023-11-17 11:53:40,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 370 transitions, 4479 flow. Second operand has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 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 11:53:40,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:40,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 54 [2023-11-17 11:53:40,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:46,033 INFO L124 PetriNetUnfolderBase]: 24662/35205 cut-off events. [2023-11-17 11:53:46,034 INFO L125 PetriNetUnfolderBase]: For 236628/236628 co-relation queries the response was YES. [2023-11-17 11:53:46,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160060 conditions, 35205 events. 24662/35205 cut-off events. For 236628/236628 co-relation queries the response was YES. Maximal size of possible extension queue 1446. Compared 220952 event pairs, 7472 based on Foata normal form. 6/34295 useless extension candidates. Maximal degree in co-relation 160008. Up to 18824 conditions per place. [2023-11-17 11:53:46,600 INFO L140 encePairwiseOnDemand]: 38/54 looper letters, 359 selfloop transitions, 194 changer transitions 14/567 dead transitions. [2023-11-17 11:53:46,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 567 transitions, 7576 flow [2023-11-17 11:53:46,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 11:53:46,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 11:53:46,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 174 transitions. [2023-11-17 11:53:46,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26851851851851855 [2023-11-17 11:53:46,602 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 174 transitions. [2023-11-17 11:53:46,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 174 transitions. [2023-11-17 11:53:46,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:46,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 174 transitions. [2023-11-17 11:53:46,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 14.5) internal successors, (174), 12 states have internal predecessors, (174), 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 11:53:46,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 54.0) internal successors, (702), 13 states have internal predecessors, (702), 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 11:53:46,604 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 54.0) internal successors, (702), 13 states have internal predecessors, (702), 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 11:53:46,604 INFO L175 Difference]: Start difference. First operand has 152 places, 370 transitions, 4479 flow. Second operand 12 states and 174 transitions. [2023-11-17 11:53:46,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 567 transitions, 7576 flow [2023-11-17 11:53:47,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 567 transitions, 7509 flow, removed 24 selfloop flow, removed 3 redundant places. [2023-11-17 11:53:47,804 INFO L231 Difference]: Finished difference. Result has 167 places, 429 transitions, 5871 flow [2023-11-17 11:53:47,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=4452, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5871, PETRI_PLACES=167, PETRI_TRANSITIONS=429} [2023-11-17 11:53:47,805 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 133 predicate places. [2023-11-17 11:53:47,805 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 429 transitions, 5871 flow [2023-11-17 11:53:47,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 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 11:53:47,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:47,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:47,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-17 11:53:48,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-17 11:53:48,006 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:53:48,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:48,006 INFO L85 PathProgramCache]: Analyzing trace with hash 533612839, now seen corresponding path program 3 times [2023-11-17 11:53:48,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:48,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325452878] [2023-11-17 11:53:48,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:48,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:48,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:48,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:53:48,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:48,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325452878] [2023-11-17 11:53:48,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325452878] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:48,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611781624] [2023-11-17 11:53:48,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 11:53:48,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:48,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:48,725 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:53:48,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-17 11:53:49,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-17 11:53:49,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:49,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 11:53:49,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:49,528 INFO L349 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2023-11-17 11:53:49,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 40 [2023-11-17 11:53:49,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 11:53:49,588 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 11:53:49,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611781624] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:53:49,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 11:53:49,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 24 [2023-11-17 11:53:49,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470444929] [2023-11-17 11:53:49,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:53:49,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 11:53:49,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:49,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 11:53:49,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2023-11-17 11:53:49,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 54 [2023-11-17 11:53:49,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 429 transitions, 5871 flow. Second operand has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 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 11:53:49,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:49,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 54 [2023-11-17 11:53:49,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:56,390 INFO L124 PetriNetUnfolderBase]: 27212/38925 cut-off events. [2023-11-17 11:53:56,390 INFO L125 PetriNetUnfolderBase]: For 305801/305801 co-relation queries the response was YES. [2023-11-17 11:53:56,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188825 conditions, 38925 events. 27212/38925 cut-off events. For 305801/305801 co-relation queries the response was YES. Maximal size of possible extension queue 1718. Compared 249604 event pairs, 8584 based on Foata normal form. 6/38015 useless extension candidates. Maximal degree in co-relation 188766. Up to 19064 conditions per place. [2023-11-17 11:53:56,955 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 522 selfloop transitions, 110 changer transitions 14/646 dead transitions. [2023-11-17 11:53:56,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 646 transitions, 9973 flow [2023-11-17 11:53:56,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 11:53:56,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 11:53:56,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 167 transitions. [2023-11-17 11:53:56,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25771604938271603 [2023-11-17 11:53:56,956 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 167 transitions. [2023-11-17 11:53:56,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 167 transitions. [2023-11-17 11:53:56,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:56,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 167 transitions. [2023-11-17 11:53:56,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 13.916666666666666) internal successors, (167), 12 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:56,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 54.0) internal successors, (702), 13 states have internal predecessors, (702), 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 11:53:56,958 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 54.0) internal successors, (702), 13 states have internal predecessors, (702), 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 11:53:56,959 INFO L175 Difference]: Start difference. First operand has 167 places, 429 transitions, 5871 flow. Second operand 12 states and 167 transitions. [2023-11-17 11:53:56,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 646 transitions, 9973 flow [2023-11-17 11:53:58,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 646 transitions, 9620 flow, removed 63 selfloop flow, removed 7 redundant places. [2023-11-17 11:53:58,782 INFO L231 Difference]: Finished difference. Result has 177 places, 464 transitions, 6557 flow [2023-11-17 11:53:58,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=5592, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6557, PETRI_PLACES=177, PETRI_TRANSITIONS=464} [2023-11-17 11:53:58,782 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 143 predicate places. [2023-11-17 11:53:58,783 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 464 transitions, 6557 flow [2023-11-17 11:53:58,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 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 11:53:58,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:58,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:58,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-17 11:53:58,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-17 11:53:58,989 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:53:58,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:58,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1121390043, now seen corresponding path program 4 times [2023-11-17 11:53:58,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:58,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624470020] [2023-11-17 11:53:58,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:58,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:59,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:53:59,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:59,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624470020] [2023-11-17 11:53:59,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624470020] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:59,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131197467] [2023-11-17 11:53:59,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 11:53:59,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:59,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:59,809 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:53:59,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-17 11:53:59,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 11:53:59,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:59,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 11:53:59,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:00,296 INFO L349 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2023-11-17 11:54:00,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 48 [2023-11-17 11:54:00,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 11:54:00,331 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 11:54:00,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131197467] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:54:00,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 11:54:00,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 24 [2023-11-17 11:54:00,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791706584] [2023-11-17 11:54:00,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:54:00,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 11:54:00,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:00,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 11:54:00,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2023-11-17 11:54:00,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 54 [2023-11-17 11:54:00,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 464 transitions, 6557 flow. Second operand has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 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 11:54:00,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:00,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 54 [2023-11-17 11:54:00,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:07,533 INFO L124 PetriNetUnfolderBase]: 28514/41079 cut-off events. [2023-11-17 11:54:07,533 INFO L125 PetriNetUnfolderBase]: For 377574/377574 co-relation queries the response was YES. [2023-11-17 11:54:07,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211232 conditions, 41079 events. 28514/41079 cut-off events. For 377574/377574 co-relation queries the response was YES. Maximal size of possible extension queue 1842. Compared 270369 event pairs, 7946 based on Foata normal form. 6/40169 useless extension candidates. Maximal degree in co-relation 211168. Up to 19064 conditions per place. [2023-11-17 11:54:08,109 INFO L140 encePairwiseOnDemand]: 38/54 looper letters, 361 selfloop transitions, 252 changer transitions 7/620 dead transitions. [2023-11-17 11:54:08,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 620 transitions, 9292 flow [2023-11-17 11:54:08,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 11:54:08,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 11:54:08,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 179 transitions. [2023-11-17 11:54:08,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2762345679012346 [2023-11-17 11:54:08,110 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 179 transitions. [2023-11-17 11:54:08,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 179 transitions. [2023-11-17 11:54:08,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:08,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 179 transitions. [2023-11-17 11:54:08,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 14.916666666666666) internal successors, (179), 12 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:08,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 54.0) internal successors, (702), 13 states have internal predecessors, (702), 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 11:54:08,112 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 54.0) internal successors, (702), 13 states have internal predecessors, (702), 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 11:54:08,112 INFO L175 Difference]: Start difference. First operand has 177 places, 464 transitions, 6557 flow. Second operand 12 states and 179 transitions. [2023-11-17 11:54:08,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 620 transitions, 9292 flow [2023-11-17 11:54:10,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 620 transitions, 9030 flow, removed 90 selfloop flow, removed 5 redundant places. [2023-11-17 11:54:10,726 INFO L231 Difference]: Finished difference. Result has 187 places, 479 transitions, 7326 flow [2023-11-17 11:54:10,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=6353, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7326, PETRI_PLACES=187, PETRI_TRANSITIONS=479} [2023-11-17 11:54:10,726 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 153 predicate places. [2023-11-17 11:54:10,727 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 479 transitions, 7326 flow [2023-11-17 11:54:10,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 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 11:54:10,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:10,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:54:10,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-17 11:54:10,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:10,928 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:54:10,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:10,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1795784811, now seen corresponding path program 5 times [2023-11-17 11:54:10,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:10,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906077481] [2023-11-17 11:54:10,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:10,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:12,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:54:12,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:12,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906077481] [2023-11-17 11:54:12,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906077481] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:12,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796648856] [2023-11-17 11:54:12,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 11:54:12,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:12,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:12,173 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:54:12,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-17 11:54:12,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 11:54:12,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:54:12,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-17 11:54:12,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:12,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 11:54:12,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 11:54:12,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 11:54:12,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 11:54:13,039 INFO L349 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2023-11-17 11:54:13,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 40 [2023-11-17 11:54:13,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:54:13,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:13,992 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:13,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 75 [2023-11-17 11:54:14,038 INFO L349 Elim1Store]: treesize reduction 12, result has 64.7 percent of original size [2023-11-17 11:54:14,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22443 treesize of output 21312 [2023-11-17 11:54:14,201 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:14,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2091 treesize of output 1859 [2023-11-17 11:54:14,320 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:14,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1835 treesize of output 1795 [2023-11-17 11:54:14,392 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:14,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1771 treesize of output 1667 [2023-11-17 11:55:07,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:55:07,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796648856] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:55:07,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:55:07,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 41 [2023-11-17 11:55:07,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065553906] [2023-11-17 11:55:07,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:55:07,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-17 11:55:07,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:07,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-17 11:55:07,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1510, Unknown=8, NotChecked=0, Total=1806 [2023-11-17 11:55:07,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 54 [2023-11-17 11:55:07,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 479 transitions, 7326 flow. Second operand has 43 states, 43 states have (on average 5.8604651162790695) internal successors, (252), 43 states have internal predecessors, (252), 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 11:55:07,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:07,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 54 [2023-11-17 11:55:07,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:22,353 INFO L124 PetriNetUnfolderBase]: 44787/64759 cut-off events. [2023-11-17 11:55:22,353 INFO L125 PetriNetUnfolderBase]: For 656305/656305 co-relation queries the response was YES. [2023-11-17 11:55:23,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338198 conditions, 64759 events. 44787/64759 cut-off events. For 656305/656305 co-relation queries the response was YES. Maximal size of possible extension queue 3001. Compared 456650 event pairs, 8997 based on Foata normal form. 44/63295 useless extension candidates. Maximal degree in co-relation 338130. Up to 19160 conditions per place. [2023-11-17 11:55:23,656 INFO L140 encePairwiseOnDemand]: 38/54 looper letters, 985 selfloop transitions, 363 changer transitions 66/1414 dead transitions. [2023-11-17 11:55:23,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 1414 transitions, 22166 flow [2023-11-17 11:55:23,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-17 11:55:23,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-11-17 11:55:23,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 658 transitions. [2023-11-17 11:55:23,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25385802469135804 [2023-11-17 11:55:23,659 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 658 transitions. [2023-11-17 11:55:23,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 658 transitions. [2023-11-17 11:55:23,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:23,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 658 transitions. [2023-11-17 11:55:23,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 13.708333333333334) internal successors, (658), 48 states have internal predecessors, (658), 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 11:55:23,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 54.0) internal successors, (2646), 49 states have internal predecessors, (2646), 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 11:55:23,664 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 54.0) internal successors, (2646), 49 states have internal predecessors, (2646), 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 11:55:23,665 INFO L175 Difference]: Start difference. First operand has 187 places, 479 transitions, 7326 flow. Second operand 48 states and 658 transitions. [2023-11-17 11:55:23,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 1414 transitions, 22166 flow [2023-11-17 11:55:31,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 1414 transitions, 20880 flow, removed 379 selfloop flow, removed 6 redundant places. [2023-11-17 11:55:31,499 INFO L231 Difference]: Finished difference. Result has 254 places, 718 transitions, 12201 flow [2023-11-17 11:55:31,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=6948, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=12201, PETRI_PLACES=254, PETRI_TRANSITIONS=718} [2023-11-17 11:55:31,499 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 220 predicate places. [2023-11-17 11:55:31,499 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 718 transitions, 12201 flow [2023-11-17 11:55:31,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 5.8604651162790695) internal successors, (252), 43 states have internal predecessors, (252), 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 11:55:31,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:31,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:55:31,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-17 11:55:31,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:31,700 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:55:31,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:31,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1844387435, now seen corresponding path program 6 times [2023-11-17 11:55:31,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:31,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249560235] [2023-11-17 11:55:31,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:31,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:32,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:55:32,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:32,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249560235] [2023-11-17 11:55:32,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249560235] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:55:32,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14394782] [2023-11-17 11:55:32,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 11:55:32,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:32,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:55:32,775 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:55:32,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-17 11:55:33,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-17 11:55:33,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:55:33,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-17 11:55:33,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:55:33,371 INFO L349 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2023-11-17 11:55:33,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 40 [2023-11-17 11:55:33,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 11:55:33,405 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 11:55:33,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14394782] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:55:33,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 11:55:33,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [14] total 24 [2023-11-17 11:55:33,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273647461] [2023-11-17 11:55:33,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:55:33,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 11:55:33,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:33,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 11:55:33,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2023-11-17 11:55:33,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 54 [2023-11-17 11:55:33,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 718 transitions, 12201 flow. Second operand has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 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 11:55:33,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:33,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 54 [2023-11-17 11:55:33,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand