/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:52:55,590 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:52:55,675 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 15:52:55,709 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:52:55,710 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:52:55,710 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:52:55,711 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:52:55,711 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:52:55,711 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:52:55,715 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:52:55,715 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:52:55,716 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:52:55,716 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:52:55,717 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:52:55,717 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:52:55,717 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:52:55,718 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:52:55,718 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:52:55,718 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:52:55,718 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:52:55,719 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:52:55,719 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:52:55,720 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:52:55,720 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:52:55,720 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:52:55,720 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:52:55,720 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:52:55,721 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:52:55,721 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:52:55,721 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:52:55,722 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:52:55,722 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:52:55,722 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:52:55,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:52:55,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:52:55,981 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:52:55,982 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:52:55,983 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:52:55,984 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c [2023-11-17 15:52:57,122 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:52:57,315 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:52:57,317 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c [2023-11-17 15:52:57,327 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad5ec6676/94a9f535be3c49a2b622f27b6444abb0/FLAGb837f0b7c [2023-11-17 15:52:57,336 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad5ec6676/94a9f535be3c49a2b622f27b6444abb0 [2023-11-17 15:52:57,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:52:57,339 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:52:57,340 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:52:57,340 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:52:57,344 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:52:57,344 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:52:57" (1/1) ... [2023-11-17 15:52:57,345 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@107abc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:52:57, skipping insertion in model container [2023-11-17 15:52:57,345 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:52:57" (1/1) ... [2023-11-17 15:52:57,369 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:52:57,568 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-name-comparator-trans.wvr.c[4827,4840] [2023-11-17 15:52:57,587 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:52:57,598 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:52:57,637 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-name-comparator-trans.wvr.c[4827,4840] [2023-11-17 15:52:57,652 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:52:57,666 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:52:57,667 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:52:57 WrapperNode [2023-11-17 15:52:57,667 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:52:57,668 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:52:57,668 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:52:57,668 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:52:57,674 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:52:57" (1/1) ... [2023-11-17 15:52:57,695 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:52:57" (1/1) ... [2023-11-17 15:52:57,734 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 319 [2023-11-17 15:52:57,734 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:52:57,735 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:52:57,735 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:52:57,735 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:52:57,744 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:52:57" (1/1) ... [2023-11-17 15:52:57,744 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:52:57" (1/1) ... [2023-11-17 15:52:57,758 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:52:57" (1/1) ... [2023-11-17 15:52:57,759 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:52:57" (1/1) ... [2023-11-17 15:52:57,767 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:52:57" (1/1) ... [2023-11-17 15:52:57,778 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:52:57" (1/1) ... [2023-11-17 15:52:57,780 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:52:57" (1/1) ... [2023-11-17 15:52:57,782 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:52:57" (1/1) ... [2023-11-17 15:52:57,784 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:52:57,785 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:52:57,785 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:52:57,785 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:52:57,786 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:52:57" (1/1) ... [2023-11-17 15:52:57,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:52:57,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:52:57,811 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 15:52:57,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 15:52:57,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:52:57,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:52:57,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:52:57,834 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:52:57,834 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 15:52:57,834 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 15:52:57,834 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 15:52:57,834 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 15:52:57,834 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 15:52:57,834 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 15:52:57,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:52:57,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 15:52:57,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:52:57,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:52:57,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:52:57,836 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 15:52:57,931 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:52:57,933 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:52:58,297 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:52:58,312 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:52:58,313 INFO L307 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-17 15:52:58,314 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:52:58 BoogieIcfgContainer [2023-11-17 15:52:58,314 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:52:58,337 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:52:58,337 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:52:58,340 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:52:58,340 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:52:57" (1/3) ... [2023-11-17 15:52:58,341 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5576f881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:52:58, skipping insertion in model container [2023-11-17 15:52:58,341 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:52:57" (2/3) ... [2023-11-17 15:52:58,341 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5576f881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:52:58, skipping insertion in model container [2023-11-17 15:52:58,341 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:52:58" (3/3) ... [2023-11-17 15:52:58,342 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-trans.wvr.c [2023-11-17 15:52:58,358 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:52:58,359 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:52:58,359 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:52:58,495 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 15:52:58,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 378 places, 394 transitions, 809 flow [2023-11-17 15:52:58,703 INFO L124 PetriNetUnfolderBase]: 26/391 cut-off events. [2023-11-17 15:52:58,703 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 15:52:58,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 391 events. 26/391 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 919 event pairs, 0 based on Foata normal form. 0/364 useless extension candidates. Maximal degree in co-relation 291. Up to 2 conditions per place. [2023-11-17 15:52:58,717 INFO L82 GeneralOperation]: Start removeDead. Operand has 378 places, 394 transitions, 809 flow [2023-11-17 15:52:58,726 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 364 places, 380 transitions, 778 flow [2023-11-17 15:52:58,729 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:52:58,741 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 364 places, 380 transitions, 778 flow [2023-11-17 15:52:58,744 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 364 places, 380 transitions, 778 flow [2023-11-17 15:52:58,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 364 places, 380 transitions, 778 flow [2023-11-17 15:52:58,830 INFO L124 PetriNetUnfolderBase]: 26/380 cut-off events. [2023-11-17 15:52:58,831 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 15:52:58,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393 conditions, 380 events. 26/380 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 916 event pairs, 0 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 291. Up to 2 conditions per place. [2023-11-17 15:52:58,853 INFO L119 LiptonReduction]: Number of co-enabled transitions 36288 [2023-11-17 15:53:09,740 INFO L134 LiptonReduction]: Checked pairs total: 33315 [2023-11-17 15:53:09,740 INFO L136 LiptonReduction]: Total number of compositions: 456 [2023-11-17 15:53:09,753 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:53:09,759 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;@68c77243, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:53:09,759 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 15:53:09,764 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:53:09,764 INFO L124 PetriNetUnfolderBase]: 4/23 cut-off events. [2023-11-17 15:53:09,764 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 15:53:09,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:53:09,765 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] [2023-11-17 15:53:09,766 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 15:53:09,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:53:09,770 INFO L85 PathProgramCache]: Analyzing trace with hash 506878946, now seen corresponding path program 1 times [2023-11-17 15:53:09,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:53:09,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465000221] [2023-11-17 15:53:09,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:53:09,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:53:09,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:53:10,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:53:10,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:53:10,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465000221] [2023-11-17 15:53:10,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465000221] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:53:10,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:53:10,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:53:10,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450206247] [2023-11-17 15:53:10,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:53:10,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:53:10,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:53:10,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:53:10,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:53:10,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 355 out of 850 [2023-11-17 15:53:10,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 361.6666666666667) internal successors, (1085), 3 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:10,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:53:10,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 355 of 850 [2023-11-17 15:53:10,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:53:10,340 INFO L124 PetriNetUnfolderBase]: 221/328 cut-off events. [2023-11-17 15:53:10,340 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-11-17 15:53:10,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 700 conditions, 328 events. 221/328 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 773 event pairs, 138 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 534. Up to 328 conditions per place. [2023-11-17 15:53:10,343 INFO L140 encePairwiseOnDemand]: 847/850 looper letters, 23 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-11-17 15:53:10,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 25 transitions, 118 flow [2023-11-17 15:53:10,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:53:10,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:53:10,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1091 transitions. [2023-11-17 15:53:10,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.427843137254902 [2023-11-17 15:53:10,365 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1091 transitions. [2023-11-17 15:53:10,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1091 transitions. [2023-11-17 15:53:10,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:53:10,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1091 transitions. [2023-11-17 15:53:10,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 363.6666666666667) internal successors, (1091), 3 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:10,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 850.0) internal successors, (3400), 4 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:10,388 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 850.0) internal successors, (3400), 4 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:10,390 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 1091 transitions. [2023-11-17 15:53:10,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 25 transitions, 118 flow [2023-11-17 15:53:10,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 106 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-17 15:53:10,397 INFO L231 Difference]: Finished difference. Result has 27 places, 25 transitions, 66 flow [2023-11-17 15:53:10,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=850, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=27, PETRI_TRANSITIONS=25} [2023-11-17 15:53:10,403 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-11-17 15:53:10,403 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 25 transitions, 66 flow [2023-11-17 15:53:10,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 361.6666666666667) internal successors, (1085), 3 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:10,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:53:10,404 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] [2023-11-17 15:53:10,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:53:10,405 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 15:53:10,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:53:10,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1294903834, now seen corresponding path program 1 times [2023-11-17 15:53:10,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:53:10,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884533753] [2023-11-17 15:53:10,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:53:10,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:53:10,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:53:10,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:53:10,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:53:10,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884533753] [2023-11-17 15:53:10,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884533753] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:53:10,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124439356] [2023-11-17 15:53:10,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:53:10,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:53:10,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:53:10,595 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:53:10,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 15:53:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:53:10,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-17 15:53:10,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:53:10,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:53:10,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:53:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:53:10,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124439356] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:53:10,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:53:10,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-17 15:53:10,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552849359] [2023-11-17 15:53:10,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:53:10,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 15:53:10,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:53:10,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 15:53:10,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-11-17 15:53:10,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 355 out of 850 [2023-11-17 15:53:10,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 66 flow. Second operand has 8 states, 8 states have (on average 358.375) internal successors, (2867), 8 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:10,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:53:10,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 355 of 850 [2023-11-17 15:53:10,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:53:10,949 INFO L124 PetriNetUnfolderBase]: 221/330 cut-off events. [2023-11-17 15:53:10,949 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:53:10,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 330 events. 221/330 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 767 event pairs, 138 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 673. Up to 328 conditions per place. [2023-11-17 15:53:10,951 INFO L140 encePairwiseOnDemand]: 847/850 looper letters, 23 selfloop transitions, 4 changer transitions 0/27 dead transitions. [2023-11-17 15:53:10,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 128 flow [2023-11-17 15:53:10,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 15:53:10,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 15:53:10,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1804 transitions. [2023-11-17 15:53:10,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4244705882352941 [2023-11-17 15:53:10,956 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1804 transitions. [2023-11-17 15:53:10,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1804 transitions. [2023-11-17 15:53:10,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:53:10,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1804 transitions. [2023-11-17 15:53:10,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 360.8) internal successors, (1804), 5 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:10,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 850.0) internal successors, (5100), 6 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:10,970 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 850.0) internal successors, (5100), 6 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:10,971 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 66 flow. Second operand 5 states and 1804 transitions. [2023-11-17 15:53:10,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 128 flow [2023-11-17 15:53:10,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 27 transitions, 124 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 15:53:10,979 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 88 flow [2023-11-17 15:53:10,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=850, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=88, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-11-17 15:53:10,980 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-11-17 15:53:10,980 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 88 flow [2023-11-17 15:53:10,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 358.375) internal successors, (2867), 8 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:10,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:53:10,982 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:53:10,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-17 15:53:11,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:53:11,187 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 15:53:11,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:53:11,188 INFO L85 PathProgramCache]: Analyzing trace with hash -760708134, now seen corresponding path program 2 times [2023-11-17 15:53:11,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:53:11,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477809961] [2023-11-17 15:53:11,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:53:11,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:53:11,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:53:11,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:53:11,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:53:11,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477809961] [2023-11-17 15:53:11,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477809961] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:53:11,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:53:11,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:53:11,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042176513] [2023-11-17 15:53:11,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:53:11,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:53:11,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:53:11,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:53:11,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:53:11,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 850 [2023-11-17 15:53:11,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 334.25) internal successors, (1337), 4 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:11,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:53:11,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 850 [2023-11-17 15:53:11,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:53:11,692 INFO L124 PetriNetUnfolderBase]: 381/567 cut-off events. [2023-11-17 15:53:11,692 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:53:11,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1175 conditions, 567 events. 381/567 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1720 event pairs, 138 based on Foata normal form. 1/418 useless extension candidates. Maximal degree in co-relation 1148. Up to 331 conditions per place. [2023-11-17 15:53:11,695 INFO L140 encePairwiseOnDemand]: 846/850 looper letters, 37 selfloop transitions, 2 changer transitions 17/56 dead transitions. [2023-11-17 15:53:11,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 56 transitions, 265 flow [2023-11-17 15:53:11,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 15:53:11,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 15:53:11,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1370 transitions. [2023-11-17 15:53:11,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40294117647058825 [2023-11-17 15:53:11,717 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1370 transitions. [2023-11-17 15:53:11,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1370 transitions. [2023-11-17 15:53:11,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:53:11,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1370 transitions. [2023-11-17 15:53:11,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 342.5) internal successors, (1370), 4 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:11,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 850.0) internal successors, (4250), 5 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:11,728 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 850.0) internal successors, (4250), 5 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:11,729 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 88 flow. Second operand 4 states and 1370 transitions. [2023-11-17 15:53:11,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 56 transitions, 265 flow [2023-11-17 15:53:11,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 56 transitions, 255 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-17 15:53:11,731 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 92 flow [2023-11-17 15:53:11,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=850, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2023-11-17 15:53:11,733 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2023-11-17 15:53:11,733 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 92 flow [2023-11-17 15:53:11,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 334.25) internal successors, (1337), 4 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:11,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:53:11,734 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:53:11,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:53:11,734 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 15:53:11,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:53:11,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1589601508, now seen corresponding path program 1 times [2023-11-17 15:53:11,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:53:11,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907602273] [2023-11-17 15:53:11,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:53:11,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:53:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:53:12,027 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 15:53:12,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:53:12,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907602273] [2023-11-17 15:53:12,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907602273] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:53:12,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:53:12,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:53:12,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55553709] [2023-11-17 15:53:12,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:53:12,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:53:12,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:53:12,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:53:12,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:53:12,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 850 [2023-11-17 15:53:12,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 334.5) internal successors, (1338), 4 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:12,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:53:12,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 850 [2023-11-17 15:53:12,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:53:12,214 INFO L124 PetriNetUnfolderBase]: 462/680 cut-off events. [2023-11-17 15:53:12,214 INFO L125 PetriNetUnfolderBase]: For 222/222 co-relation queries the response was YES. [2023-11-17 15:53:12,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1614 conditions, 680 events. 462/680 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2134 event pairs, 183 based on Foata normal form. 1/509 useless extension candidates. Maximal degree in co-relation 1602. Up to 416 conditions per place. [2023-11-17 15:53:12,218 INFO L140 encePairwiseOnDemand]: 846/850 looper letters, 39 selfloop transitions, 2 changer transitions 16/57 dead transitions. [2023-11-17 15:53:12,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 57 transitions, 290 flow [2023-11-17 15:53:12,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 15:53:12,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 15:53:12,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1368 transitions. [2023-11-17 15:53:12,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023529411764706 [2023-11-17 15:53:12,222 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1368 transitions. [2023-11-17 15:53:12,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1368 transitions. [2023-11-17 15:53:12,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:53:12,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1368 transitions. [2023-11-17 15:53:12,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:12,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 850.0) internal successors, (4250), 5 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:12,248 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 850.0) internal successors, (4250), 5 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:12,248 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 92 flow. Second operand 4 states and 1368 transitions. [2023-11-17 15:53:12,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 57 transitions, 290 flow [2023-11-17 15:53:12,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 57 transitions, 276 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-17 15:53:12,251 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 100 flow [2023-11-17 15:53:12,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=850, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2023-11-17 15:53:12,253 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2023-11-17 15:53:12,253 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 100 flow [2023-11-17 15:53:12,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 334.5) internal successors, (1338), 4 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:12,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:53:12,254 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 15:53:12,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:53:12,255 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 15:53:12,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:53:12,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1059116461, now seen corresponding path program 1 times [2023-11-17 15:53:12,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:53:12,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785609592] [2023-11-17 15:53:12,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:53:12,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:53:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:53:13,295 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:53:13,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:53:13,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785609592] [2023-11-17 15:53:13,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785609592] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:53:13,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396299730] [2023-11-17 15:53:13,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:53:13,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:53:13,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:53:13,305 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:53:13,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 15:53:13,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:53:13,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 15:53:13,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:53:13,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 15:53:13,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 27 [2023-11-17 15:53:14,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 83 [2023-11-17 15:53:14,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:53:14,498 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:53:15,497 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:53:15,498 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 207 treesize of output 115 [2023-11-17 15:53:15,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-11-17 15:53:15,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:53:15,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396299730] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:53:15,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:53:15,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 30 [2023-11-17 15:53:15,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821271718] [2023-11-17 15:53:15,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:53:15,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 15:53:15,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:53:15,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 15:53:15,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=868, Unknown=4, NotChecked=0, Total=992 [2023-11-17 15:53:15,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 850 [2023-11-17 15:53:15,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 100 flow. Second operand has 32 states, 32 states have (on average 271.15625) internal successors, (8677), 32 states have internal predecessors, (8677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:15,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:53:15,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 850 [2023-11-17 15:53:15,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:53:19,579 INFO L124 PetriNetUnfolderBase]: 990/1465 cut-off events. [2023-11-17 15:53:19,579 INFO L125 PetriNetUnfolderBase]: For 494/494 co-relation queries the response was YES. [2023-11-17 15:53:19,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3852 conditions, 1465 events. 990/1465 cut-off events. For 494/494 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5785 event pairs, 49 based on Foata normal form. 4/1108 useless extension candidates. Maximal degree in co-relation 3836. Up to 347 conditions per place. [2023-11-17 15:53:19,587 INFO L140 encePairwiseOnDemand]: 837/850 looper letters, 160 selfloop transitions, 69 changer transitions 35/264 dead transitions. [2023-11-17 15:53:19,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 264 transitions, 1282 flow [2023-11-17 15:53:19,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-17 15:53:19,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-17 15:53:19,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 8869 transitions. [2023-11-17 15:53:19,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3260661764705882 [2023-11-17 15:53:19,626 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 8869 transitions. [2023-11-17 15:53:19,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 8869 transitions. [2023-11-17 15:53:19,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:53:19,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 8869 transitions. [2023-11-17 15:53:19,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 277.15625) internal successors, (8869), 32 states have internal predecessors, (8869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:19,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 850.0) internal successors, (28050), 33 states have internal predecessors, (28050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:19,694 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 850.0) internal successors, (28050), 33 states have internal predecessors, (28050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:19,694 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 100 flow. Second operand 32 states and 8869 transitions. [2023-11-17 15:53:19,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 264 transitions, 1282 flow [2023-11-17 15:53:19,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 264 transitions, 1225 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-11-17 15:53:19,700 INFO L231 Difference]: Finished difference. Result has 84 places, 97 transitions, 602 flow [2023-11-17 15:53:19,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=850, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=602, PETRI_PLACES=84, PETRI_TRANSITIONS=97} [2023-11-17 15:53:19,701 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 54 predicate places. [2023-11-17 15:53:19,701 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 97 transitions, 602 flow [2023-11-17 15:53:19,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 271.15625) internal successors, (8677), 32 states have internal predecessors, (8677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:19,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:53:19,704 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 15:53:19,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 15:53:19,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:53:19,910 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 15:53:19,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:53:19,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1163544095, now seen corresponding path program 2 times [2023-11-17 15:53:19,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:53:19,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054344976] [2023-11-17 15:53:19,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:53:19,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:53:19,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:53:20,881 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:53:20,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:53:20,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054344976] [2023-11-17 15:53:20,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054344976] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:53:20,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627784181] [2023-11-17 15:53:20,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 15:53:20,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:53:20,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:53:20,884 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 15:53:20,911 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 15:53:21,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 15:53:21,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:53:21,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 15:53:21,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:53:21,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 77 [2023-11-17 15:53:21,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:53:21,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:53:22,015 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 15:53:22,015 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 165 treesize of output 84 [2023-11-17 15:53:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:53:22,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627784181] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:53:22,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:53:22,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 23 [2023-11-17 15:53:22,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558972948] [2023-11-17 15:53:22,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:53:22,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 15:53:22,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:53:22,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 15:53:22,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2023-11-17 15:53:22,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 850 [2023-11-17 15:53:22,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 97 transitions, 602 flow. Second operand has 24 states, 24 states have (on average 280.5833333333333) internal successors, (6734), 24 states have internal predecessors, (6734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:22,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:53:22,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 850 [2023-11-17 15:53:22,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:53:28,922 INFO L124 PetriNetUnfolderBase]: 2887/4493 cut-off events. [2023-11-17 15:53:28,922 INFO L125 PetriNetUnfolderBase]: For 35947/35947 co-relation queries the response was YES. [2023-11-17 15:53:28,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22075 conditions, 4493 events. 2887/4493 cut-off events. For 35947/35947 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 24273 event pairs, 229 based on Foata normal form. 12/4130 useless extension candidates. Maximal degree in co-relation 22031. Up to 993 conditions per place. [2023-11-17 15:53:28,964 INFO L140 encePairwiseOnDemand]: 836/850 looper letters, 310 selfloop transitions, 197 changer transitions 120/627 dead transitions. [2023-11-17 15:53:28,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 627 transitions, 5388 flow [2023-11-17 15:53:28,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-11-17 15:53:28,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-11-17 15:53:28,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 16331 transitions. [2023-11-17 15:53:29,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3370691434468524 [2023-11-17 15:53:29,002 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 16331 transitions. [2023-11-17 15:53:29,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 16331 transitions. [2023-11-17 15:53:29,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:53:29,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 16331 transitions. [2023-11-17 15:53:29,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 286.50877192982455) internal successors, (16331), 57 states have internal predecessors, (16331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:29,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 850.0) internal successors, (49300), 58 states have internal predecessors, (49300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:29,118 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 850.0) internal successors, (49300), 58 states have internal predecessors, (49300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:29,118 INFO L175 Difference]: Start difference. First operand has 84 places, 97 transitions, 602 flow. Second operand 57 states and 16331 transitions. [2023-11-17 15:53:29,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 627 transitions, 5388 flow [2023-11-17 15:53:29,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 627 transitions, 4537 flow, removed 391 selfloop flow, removed 8 redundant places. [2023-11-17 15:53:29,277 INFO L231 Difference]: Finished difference. Result has 167 places, 259 transitions, 2308 flow [2023-11-17 15:53:29,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=850, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=2308, PETRI_PLACES=167, PETRI_TRANSITIONS=259} [2023-11-17 15:53:29,279 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 137 predicate places. [2023-11-17 15:53:29,279 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 259 transitions, 2308 flow [2023-11-17 15:53:29,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 280.5833333333333) internal successors, (6734), 24 states have internal predecessors, (6734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:29,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:53:29,282 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 15:53:29,287 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 15:53:29,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:53:29,487 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 15:53:29,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:53:29,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1287619231, now seen corresponding path program 3 times [2023-11-17 15:53:29,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:53:29,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658594929] [2023-11-17 15:53:29,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:53:29,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:53:29,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:53:30,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:53:30,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:53:30,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658594929] [2023-11-17 15:53:30,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658594929] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:53:30,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333416845] [2023-11-17 15:53:30,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 15:53:30,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:53:30,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:53:30,337 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 15:53:30,371 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 15:53:30,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 15:53:30,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:53:30,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-17 15:53:30,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:53:30,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 82 [2023-11-17 15:53:30,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 70 [2023-11-17 15:53:31,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 116 [2023-11-17 15:53:31,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:53:31,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:53:32,337 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:53:32,338 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 243 treesize of output 147 [2023-11-17 15:53:32,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 46 [2023-11-17 15:53:32,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2023-11-17 15:53:32,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:53:32,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333416845] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:53:32,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:53:32,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 29 [2023-11-17 15:53:32,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124130695] [2023-11-17 15:53:32,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:53:32,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-17 15:53:32,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:53:32,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-17 15:53:32,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=835, Unknown=4, NotChecked=0, Total=930 [2023-11-17 15:53:32,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 850 [2023-11-17 15:53:32,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 259 transitions, 2308 flow. Second operand has 31 states, 31 states have (on average 271.06451612903226) internal successors, (8403), 31 states have internal predecessors, (8403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:32,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:53:32,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 850 [2023-11-17 15:53:32,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:53:39,907 INFO L124 PetriNetUnfolderBase]: 6109/9553 cut-off events. [2023-11-17 15:53:39,908 INFO L125 PetriNetUnfolderBase]: For 360758/360758 co-relation queries the response was YES. [2023-11-17 15:53:39,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72657 conditions, 9553 events. 6109/9553 cut-off events. For 360758/360758 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 59205 event pairs, 787 based on Foata normal form. 26/9269 useless extension candidates. Maximal degree in co-relation 72579. Up to 2359 conditions per place. [2023-11-17 15:53:40,028 INFO L140 encePairwiseOnDemand]: 837/850 looper letters, 594 selfloop transitions, 273 changer transitions 95/962 dead transitions. [2023-11-17 15:53:40,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 962 transitions, 12525 flow [2023-11-17 15:53:40,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-17 15:53:40,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-11-17 15:53:40,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 11980 transitions. [2023-11-17 15:53:40,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3277701778385773 [2023-11-17 15:53:40,047 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 11980 transitions. [2023-11-17 15:53:40,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 11980 transitions. [2023-11-17 15:53:40,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:53:40,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 11980 transitions. [2023-11-17 15:53:40,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 278.6046511627907) internal successors, (11980), 43 states have internal predecessors, (11980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:40,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 850.0) internal successors, (37400), 44 states have internal predecessors, (37400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:40,120 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 850.0) internal successors, (37400), 44 states have internal predecessors, (37400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:40,120 INFO L175 Difference]: Start difference. First operand has 167 places, 259 transitions, 2308 flow. Second operand 43 states and 11980 transitions. [2023-11-17 15:53:40,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 962 transitions, 12525 flow [2023-11-17 15:53:41,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 962 transitions, 10264 flow, removed 1034 selfloop flow, removed 14 redundant places. [2023-11-17 15:53:41,230 INFO L231 Difference]: Finished difference. Result has 204 places, 455 transitions, 4449 flow [2023-11-17 15:53:41,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=850, PETRI_DIFFERENCE_MINUEND_FLOW=1769, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=4449, PETRI_PLACES=204, PETRI_TRANSITIONS=455} [2023-11-17 15:53:41,231 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 174 predicate places. [2023-11-17 15:53:41,231 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 455 transitions, 4449 flow [2023-11-17 15:53:41,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 271.06451612903226) internal successors, (8403), 31 states have internal predecessors, (8403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:41,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:53:41,233 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 15:53:41,240 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 15:53:41,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:53:41,439 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 15:53:41,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:53:41,439 INFO L85 PathProgramCache]: Analyzing trace with hash 215757939, now seen corresponding path program 4 times [2023-11-17 15:53:41,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:53:41,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052328052] [2023-11-17 15:53:41,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:53:41,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:53:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:53:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:53:42,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:53:42,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052328052] [2023-11-17 15:53:42,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052328052] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:53:42,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117221252] [2023-11-17 15:53:42,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 15:53:42,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:53:42,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:53:42,271 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 15:53:42,292 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 15:53:42,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 15:53:42,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:53:42,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 15:53:42,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:53:42,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 72 [2023-11-17 15:53:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:53:42,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:53:43,259 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:53:43,259 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 80 treesize of output 48 [2023-11-17 15:53:43,357 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:53:43,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117221252] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:53:43,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:53:43,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2023-11-17 15:53:43,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341712314] [2023-11-17 15:53:43,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:53:43,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 15:53:43,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:53:43,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 15:53:43,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2023-11-17 15:53:43,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 850 [2023-11-17 15:53:43,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 455 transitions, 4449 flow. Second operand has 22 states, 22 states have (on average 292.72727272727275) internal successors, (6440), 22 states have internal predecessors, (6440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:43,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:53:43,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 850 [2023-11-17 15:53:43,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:53:47,992 INFO L124 PetriNetUnfolderBase]: 8988/14200 cut-off events. [2023-11-17 15:53:47,992 INFO L125 PetriNetUnfolderBase]: For 719079/719079 co-relation queries the response was YES. [2023-11-17 15:53:48,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121486 conditions, 14200 events. 8988/14200 cut-off events. For 719079/719079 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 95202 event pairs, 1218 based on Foata normal form. 41/14241 useless extension candidates. Maximal degree in co-relation 121399. Up to 3251 conditions per place. [2023-11-17 15:53:48,145 INFO L140 encePairwiseOnDemand]: 840/850 looper letters, 456 selfloop transitions, 375 changer transitions 98/929 dead transitions. [2023-11-17 15:53:48,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 929 transitions, 13017 flow [2023-11-17 15:53:48,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-17 15:53:48,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-17 15:53:48,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 9584 transitions. [2023-11-17 15:53:48,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3523529411764706 [2023-11-17 15:53:48,166 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 9584 transitions. [2023-11-17 15:53:48,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 9584 transitions. [2023-11-17 15:53:48,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:53:48,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 9584 transitions. [2023-11-17 15:53:48,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 299.5) internal successors, (9584), 32 states have internal predecessors, (9584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:48,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 850.0) internal successors, (28050), 33 states have internal predecessors, (28050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:48,209 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 850.0) internal successors, (28050), 33 states have internal predecessors, (28050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:48,209 INFO L175 Difference]: Start difference. First operand has 204 places, 455 transitions, 4449 flow. Second operand 32 states and 9584 transitions. [2023-11-17 15:53:48,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 929 transitions, 13017 flow [2023-11-17 15:53:50,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 929 transitions, 12076 flow, removed 469 selfloop flow, removed 9 redundant places. [2023-11-17 15:53:50,730 INFO L231 Difference]: Finished difference. Result has 239 places, 599 transitions, 6891 flow [2023-11-17 15:53:50,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=850, PETRI_DIFFERENCE_MINUEND_FLOW=4054, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=6891, PETRI_PLACES=239, PETRI_TRANSITIONS=599} [2023-11-17 15:53:50,732 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 209 predicate places. [2023-11-17 15:53:50,732 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 599 transitions, 6891 flow [2023-11-17 15:53:50,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 292.72727272727275) internal successors, (6440), 22 states have internal predecessors, (6440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:50,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:53:50,733 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 15:53:50,742 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 15:53:50,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:53:50,939 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 15:53:50,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:53:50,940 INFO L85 PathProgramCache]: Analyzing trace with hash 2004491173, now seen corresponding path program 5 times [2023-11-17 15:53:50,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:53:50,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083959760] [2023-11-17 15:53:50,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:53:50,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:53:51,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:53:51,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:53:51,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:53:51,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083959760] [2023-11-17 15:53:51,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083959760] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:53:51,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253344597] [2023-11-17 15:53:51,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 15:53:51,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:53:51,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:53:51,565 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 15:53:51,587 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 15:53:51,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 15:53:51,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:53:51,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 15:53:51,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:53:51,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 68 [2023-11-17 15:53:52,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:53:52,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:53:52,970 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:53:52,970 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 195 treesize of output 107 [2023-11-17 15:53:53,118 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:53:53,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253344597] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:53:53,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:53:53,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 25 [2023-11-17 15:53:53,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233297416] [2023-11-17 15:53:53,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:53:53,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 15:53:53,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:53:53,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 15:53:53,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2023-11-17 15:53:53,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 850 [2023-11-17 15:53:53,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 599 transitions, 6891 flow. Second operand has 26 states, 26 states have (on average 276.38461538461536) internal successors, (7186), 26 states have internal predecessors, (7186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:53,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:53:53,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 850 [2023-11-17 15:53:53,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:53:58,856 INFO L124 PetriNetUnfolderBase]: 10577/16856 cut-off events. [2023-11-17 15:53:58,857 INFO L125 PetriNetUnfolderBase]: For 765896/765896 co-relation queries the response was YES. [2023-11-17 15:53:58,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146370 conditions, 16856 events. 10577/16856 cut-off events. For 765896/765896 co-relation queries the response was YES. Maximal size of possible extension queue 924. Compared 118550 event pairs, 2164 based on Foata normal form. 12/16868 useless extension candidates. Maximal degree in co-relation 146270. Up to 9009 conditions per place. [2023-11-17 15:53:59,082 INFO L140 encePairwiseOnDemand]: 838/850 looper letters, 611 selfloop transitions, 391 changer transitions 45/1047 dead transitions. [2023-11-17 15:53:59,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 1047 transitions, 14440 flow [2023-11-17 15:53:59,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 15:53:59,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 15:53:59,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 7350 transitions. [2023-11-17 15:53:59,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.332579185520362 [2023-11-17 15:53:59,094 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 7350 transitions. [2023-11-17 15:53:59,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 7350 transitions. [2023-11-17 15:53:59,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:53:59,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 7350 transitions. [2023-11-17 15:53:59,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 282.6923076923077) internal successors, (7350), 26 states have internal predecessors, (7350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:59,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 850.0) internal successors, (22950), 27 states have internal predecessors, (22950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:59,125 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 850.0) internal successors, (22950), 27 states have internal predecessors, (22950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:59,125 INFO L175 Difference]: Start difference. First operand has 239 places, 599 transitions, 6891 flow. Second operand 26 states and 7350 transitions. [2023-11-17 15:53:59,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 1047 transitions, 14440 flow [2023-11-17 15:54:01,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 1047 transitions, 14107 flow, removed 109 selfloop flow, removed 9 redundant places. [2023-11-17 15:54:01,852 INFO L231 Difference]: Finished difference. Result has 265 places, 791 transitions, 10419 flow [2023-11-17 15:54:01,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=850, PETRI_DIFFERENCE_MINUEND_FLOW=6641, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=10419, PETRI_PLACES=265, PETRI_TRANSITIONS=791} [2023-11-17 15:54:01,853 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 235 predicate places. [2023-11-17 15:54:01,854 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 791 transitions, 10419 flow [2023-11-17 15:54:01,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 276.38461538461536) internal successors, (7186), 26 states have internal predecessors, (7186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:01,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:54:01,855 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 15:54:01,859 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 15:54:02,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:54:02,056 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 15:54:02,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:54:02,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1128718685, now seen corresponding path program 6 times [2023-11-17 15:54:02,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:54:02,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950298086] [2023-11-17 15:54:02,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:54:02,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:54:02,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:54:02,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:54:02,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:54:02,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950298086] [2023-11-17 15:54:02,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950298086] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:54:02,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013392546] [2023-11-17 15:54:02,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 15:54:02,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:54:02,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:54:02,657 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 15:54:02,679 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 15:54:02,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 15:54:02,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:54:02,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-17 15:54:02,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:54:03,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 90 [2023-11-17 15:54:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:54:03,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:54:03,767 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:54:03,767 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 222 treesize of output 118 [2023-11-17 15:54:03,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:54:03,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013392546] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:54:03,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:54:03,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2023-11-17 15:54:03,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807858630] [2023-11-17 15:54:03,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:54:03,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 15:54:03,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:54:03,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 15:54:03,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2023-11-17 15:54:03,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 850 [2023-11-17 15:54:03,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 791 transitions, 10419 flow. Second operand has 22 states, 22 states have (on average 292.72727272727275) internal successors, (6440), 22 states have internal predecessors, (6440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:03,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:54:03,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 850 [2023-11-17 15:54:03,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:54:10,073 INFO L124 PetriNetUnfolderBase]: 11772/18940 cut-off events. [2023-11-17 15:54:10,073 INFO L125 PetriNetUnfolderBase]: For 1208942/1208942 co-relation queries the response was YES. [2023-11-17 15:54:10,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189044 conditions, 18940 events. 11772/18940 cut-off events. For 1208942/1208942 co-relation queries the response was YES. Maximal size of possible extension queue 1044. Compared 137321 event pairs, 1931 based on Foata normal form. 27/18967 useless extension candidates. Maximal degree in co-relation 188934. Up to 5767 conditions per place. [2023-11-17 15:54:10,326 INFO L140 encePairwiseOnDemand]: 839/850 looper letters, 524 selfloop transitions, 455 changer transitions 140/1119 dead transitions. [2023-11-17 15:54:10,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 1119 transitions, 18843 flow [2023-11-17 15:54:10,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 15:54:10,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 15:54:10,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 7190 transitions. [2023-11-17 15:54:10,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3524509803921569 [2023-11-17 15:54:10,338 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 7190 transitions. [2023-11-17 15:54:10,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 7190 transitions. [2023-11-17 15:54:10,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:54:10,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 7190 transitions. [2023-11-17 15:54:10,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 299.5833333333333) internal successors, (7190), 24 states have internal predecessors, (7190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:10,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 850.0) internal successors, (21250), 25 states have internal predecessors, (21250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:10,375 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 850.0) internal successors, (21250), 25 states have internal predecessors, (21250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:10,375 INFO L175 Difference]: Start difference. First operand has 265 places, 791 transitions, 10419 flow. Second operand 24 states and 7190 transitions. [2023-11-17 15:54:10,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 1119 transitions, 18843 flow [2023-11-17 15:54:15,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 1119 transitions, 16667 flow, removed 1044 selfloop flow, removed 5 redundant places. [2023-11-17 15:54:15,912 INFO L231 Difference]: Finished difference. Result has 293 places, 817 transitions, 11302 flow [2023-11-17 15:54:15,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=850, PETRI_DIFFERENCE_MINUEND_FLOW=9399, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=787, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=420, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=11302, PETRI_PLACES=293, PETRI_TRANSITIONS=817} [2023-11-17 15:54:15,913 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 263 predicate places. [2023-11-17 15:54:15,913 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 817 transitions, 11302 flow [2023-11-17 15:54:15,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 292.72727272727275) internal successors, (6440), 22 states have internal predecessors, (6440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:15,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:54:15,914 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 15:54:15,918 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 15:54:16,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:54:16,114 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 15:54:16,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:54:16,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1576916091, now seen corresponding path program 7 times [2023-11-17 15:54:16,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:54:16,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452491402] [2023-11-17 15:54:16,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:54:16,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:54:16,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:54:16,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:54:16,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:54:16,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452491402] [2023-11-17 15:54:16,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452491402] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:54:16,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100747752] [2023-11-17 15:54:16,692 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 15:54:16,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:54:16,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:54:16,697 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 15:54:16,719 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 15:54:16,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:54:16,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-17 15:54:16,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:54:17,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 15:54:17,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2023-11-17 15:54:17,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 72 [2023-11-17 15:54:17,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:54:17,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:54:18,127 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:54:18,127 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 139 treesize of output 99 [2023-11-17 15:54:18,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 53 [2023-11-17 15:54:18,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2023-11-17 15:54:18,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:54:18,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100747752] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:54:18,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:54:18,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 31 [2023-11-17 15:54:18,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390170258] [2023-11-17 15:54:18,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:54:18,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-17 15:54:18,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:54:18,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-17 15:54:18,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=938, Unknown=1, NotChecked=0, Total=1056 [2023-11-17 15:54:18,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 850 [2023-11-17 15:54:18,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 817 transitions, 11302 flow. Second operand has 33 states, 33 states have (on average 271.09090909090907) internal successors, (8946), 33 states have internal predecessors, (8946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:18,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:54:18,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 850 [2023-11-17 15:54:18,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:54:30,228 INFO L124 PetriNetUnfolderBase]: 13646/21938 cut-off events. [2023-11-17 15:54:30,228 INFO L125 PetriNetUnfolderBase]: For 1305841/1305841 co-relation queries the response was YES. [2023-11-17 15:54:30,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223299 conditions, 21938 events. 13646/21938 cut-off events. For 1305841/1305841 co-relation queries the response was YES. Maximal size of possible extension queue 1228. Compared 163123 event pairs, 1490 based on Foata normal form. 118/22056 useless extension candidates. Maximal degree in co-relation 223177. Up to 4979 conditions per place. [2023-11-17 15:54:30,507 INFO L140 encePairwiseOnDemand]: 838/850 looper letters, 538 selfloop transitions, 539 changer transitions 321/1398 dead transitions. [2023-11-17 15:54:30,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 1398 transitions, 24009 flow [2023-11-17 15:54:30,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-17 15:54:30,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-11-17 15:54:30,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 15499 transitions. [2023-11-17 15:54:30,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.325609243697479 [2023-11-17 15:54:30,531 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 15499 transitions. [2023-11-17 15:54:30,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 15499 transitions. [2023-11-17 15:54:30,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:54:30,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 15499 transitions. [2023-11-17 15:54:30,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 276.76785714285717) internal successors, (15499), 56 states have internal predecessors, (15499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:30,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 850.0) internal successors, (48450), 57 states have internal predecessors, (48450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:30,598 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 850.0) internal successors, (48450), 57 states have internal predecessors, (48450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:30,598 INFO L175 Difference]: Start difference. First operand has 293 places, 817 transitions, 11302 flow. Second operand 56 states and 15499 transitions. [2023-11-17 15:54:30,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 1398 transitions, 24009 flow [2023-11-17 15:54:37,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 1398 transitions, 23435 flow, removed 157 selfloop flow, removed 12 redundant places. [2023-11-17 15:54:37,448 INFO L231 Difference]: Finished difference. Result has 367 places, 891 transitions, 14048 flow [2023-11-17 15:54:37,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=850, PETRI_DIFFERENCE_MINUEND_FLOW=10864, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=813, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=430, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=14048, PETRI_PLACES=367, PETRI_TRANSITIONS=891} [2023-11-17 15:54:37,449 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 337 predicate places. [2023-11-17 15:54:37,449 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 891 transitions, 14048 flow [2023-11-17 15:54:37,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 271.09090909090907) internal successors, (8946), 33 states have internal predecessors, (8946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:37,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:54:37,451 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 15:54:37,455 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 15:54:37,651 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,SelfDestructingSolverStorable10 [2023-11-17 15:54:37,652 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 15:54:37,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:54:37,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1467753795, now seen corresponding path program 8 times [2023-11-17 15:54:37,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:54:37,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214081489] [2023-11-17 15:54:37,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:54:37,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:54:37,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:54:38,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:54:38,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:54:38,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214081489] [2023-11-17 15:54:38,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214081489] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:54:38,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700295679] [2023-11-17 15:54:38,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 15:54:38,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:54:38,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:54:38,356 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 15:54:38,358 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 15:54:38,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 15:54:38,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:54:38,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-17 15:54:38,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:54:38,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 15:54:38,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 70 [2023-11-17 15:54:38,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 15:54:38,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 70 [2023-11-17 15:54:38,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 101 [2023-11-17 15:54:39,403 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:54:39,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:54:40,203 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:54:40,204 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 243 treesize of output 151 [2023-11-17 15:54:40,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2023-11-17 15:54:40,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 46 [2023-11-17 15:54:40,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:54:40,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700295679] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:54:40,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:54:40,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 33 [2023-11-17 15:54:40,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311892196] [2023-11-17 15:54:40,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:54:40,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 15:54:40,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:54:40,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 15:54:40,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1067, Unknown=7, NotChecked=0, Total=1190 [2023-11-17 15:54:40,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 850 [2023-11-17 15:54:40,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 891 transitions, 14048 flow. Second operand has 35 states, 35 states have (on average 267.9714285714286) internal successors, (9379), 35 states have internal predecessors, (9379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:40,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:54:40,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 850 [2023-11-17 15:54:40,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:54:58,882 INFO L124 PetriNetUnfolderBase]: 16001/25586 cut-off events. [2023-11-17 15:54:58,882 INFO L125 PetriNetUnfolderBase]: For 3032834/3032834 co-relation queries the response was YES. [2023-11-17 15:54:59,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333636 conditions, 25586 events. 16001/25586 cut-off events. For 3032834/3032834 co-relation queries the response was YES. Maximal size of possible extension queue 1439. Compared 192638 event pairs, 2073 based on Foata normal form. 63/25649 useless extension candidates. Maximal degree in co-relation 333483. Up to 6481 conditions per place. [2023-11-17 15:54:59,484 INFO L140 encePairwiseOnDemand]: 838/850 looper letters, 968 selfloop transitions, 821 changer transitions 106/1895 dead transitions. [2023-11-17 15:54:59,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 1895 transitions, 36917 flow [2023-11-17 15:54:59,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-17 15:54:59,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2023-11-17 15:54:59,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 18088 transitions. [2023-11-17 15:54:59,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32242424242424245 [2023-11-17 15:54:59,500 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 18088 transitions. [2023-11-17 15:54:59,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 18088 transitions. [2023-11-17 15:54:59,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:54:59,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 18088 transitions. [2023-11-17 15:54:59,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 274.06060606060606) internal successors, (18088), 66 states have internal predecessors, (18088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:59,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 850.0) internal successors, (56950), 67 states have internal predecessors, (56950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:59,570 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 850.0) internal successors, (56950), 67 states have internal predecessors, (56950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:59,570 INFO L175 Difference]: Start difference. First operand has 367 places, 891 transitions, 14048 flow. Second operand 66 states and 18088 transitions. [2023-11-17 15:54:59,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 1895 transitions, 36917 flow [2023-11-17 15:55:15,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 1895 transitions, 33446 flow, removed 1600 selfloop flow, removed 30 redundant places. [2023-11-17 15:55:15,570 INFO L231 Difference]: Finished difference. Result has 412 places, 1307 transitions, 23235 flow [2023-11-17 15:55:15,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=850, PETRI_DIFFERENCE_MINUEND_FLOW=12585, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=891, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=450, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=23235, PETRI_PLACES=412, PETRI_TRANSITIONS=1307} [2023-11-17 15:55:15,571 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 382 predicate places. [2023-11-17 15:55:15,571 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 1307 transitions, 23235 flow [2023-11-17 15:55:15,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 267.9714285714286) internal successors, (9379), 35 states have internal predecessors, (9379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:55:15,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:55:15,573 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 15:55:15,582 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 15:55:15,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:55:15,782 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 15:55:15,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:55:15,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1464936993, now seen corresponding path program 9 times [2023-11-17 15:55:15,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:55:15,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688705558] [2023-11-17 15:55:15,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:55:15,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:55:15,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:55:16,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:55:16,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:55:16,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688705558] [2023-11-17 15:55:16,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688705558] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:55:16,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644755299] [2023-11-17 15:55:16,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 15:55:16,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:55:16,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:55:16,477 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 15:55:16,488 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 15:55:16,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 15:55:16,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:55:16,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-17 15:55:16,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:55:16,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 114 [2023-11-17 15:55:17,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:55:17,353 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:55:17,974 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:55:17,974 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 136 treesize of output 76 [2023-11-17 15:55:18,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:55:18,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644755299] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:55:18,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:55:18,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 27 [2023-11-17 15:55:18,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897252090] [2023-11-17 15:55:18,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:55:18,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 15:55:18,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:55:18,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 15:55:18,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2023-11-17 15:55:18,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 850 [2023-11-17 15:55:18,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 1307 transitions, 23235 flow. Second operand has 28 states, 28 states have (on average 276.2142857142857) internal successors, (7734), 28 states have internal predecessors, (7734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:55:18,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:55:18,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 850 [2023-11-17 15:55:18,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:55:35,565 INFO L124 PetriNetUnfolderBase]: 19390/31186 cut-off events. [2023-11-17 15:55:35,565 INFO L125 PetriNetUnfolderBase]: For 6688475/6688475 co-relation queries the response was YES. [2023-11-17 15:55:36,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511197 conditions, 31186 events. 19390/31186 cut-off events. For 6688475/6688475 co-relation queries the response was YES. Maximal size of possible extension queue 1727. Compared 244087 event pairs, 2638 based on Foata normal form. 33/31219 useless extension candidates. Maximal degree in co-relation 511030. Up to 8097 conditions per place. [2023-11-17 15:55:36,584 INFO L140 encePairwiseOnDemand]: 837/850 looper letters, 1284 selfloop transitions, 619 changer transitions 59/1962 dead transitions. [2023-11-17 15:55:36,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 1962 transitions, 44605 flow [2023-11-17 15:55:36,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-17 15:55:36,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-17 15:55:36,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 13288 transitions. [2023-11-17 15:55:36,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3326157697121402 [2023-11-17 15:55:36,601 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 13288 transitions. [2023-11-17 15:55:36,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 13288 transitions. [2023-11-17 15:55:36,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:55:36,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 13288 transitions. [2023-11-17 15:55:36,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 282.72340425531917) internal successors, (13288), 47 states have internal predecessors, (13288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:55:36,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 850.0) internal successors, (40800), 48 states have internal predecessors, (40800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:55:36,661 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 850.0) internal successors, (40800), 48 states have internal predecessors, (40800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:55:36,661 INFO L175 Difference]: Start difference. First operand has 412 places, 1307 transitions, 23235 flow. Second operand 47 states and 13288 transitions. [2023-11-17 15:55:36,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 1962 transitions, 44605 flow [2023-11-17 15:56:19,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 1962 transitions, 39448 flow, removed 2459 selfloop flow, removed 15 redundant places. [2023-11-17 15:56:19,464 INFO L231 Difference]: Finished difference. Result has 463 places, 1439 transitions, 25509 flow [2023-11-17 15:56:19,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=850, PETRI_DIFFERENCE_MINUEND_FLOW=20113, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=506, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=782, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=25509, PETRI_PLACES=463, PETRI_TRANSITIONS=1439} [2023-11-17 15:56:19,465 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 433 predicate places. [2023-11-17 15:56:19,465 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 1439 transitions, 25509 flow [2023-11-17 15:56:19,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 276.2142857142857) internal successors, (7734), 28 states have internal predecessors, (7734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:19,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:56:19,466 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 15:56:19,482 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 15:56:19,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-17 15:56:19,667 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 15:56:19,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:56:19,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1458317701, now seen corresponding path program 10 times [2023-11-17 15:56:19,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:56:19,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9667531] [2023-11-17 15:56:19,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:56:19,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:56:19,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:56:20,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:56:20,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:56:20,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9667531] [2023-11-17 15:56:20,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9667531] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:56:20,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696492407] [2023-11-17 15:56:20,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 15:56:20,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:56:20,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:56:20,165 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 15:56:20,190 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 15:56:20,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 15:56:20,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:56:20,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 15:56:20,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:56:20,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 101 [2023-11-17 15:56:20,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:56:20,865 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:56:21,283 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:56:21,283 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 193 treesize of output 105 [2023-11-17 15:56:21,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:56:21,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696492407] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:56:21,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:56:21,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2023-11-17 15:56:21,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744131431] [2023-11-17 15:56:21,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:56:21,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 15:56:21,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:56:21,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 15:56:21,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-11-17 15:56:21,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 850 [2023-11-17 15:56:21,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 1439 transitions, 25509 flow. Second operand has 22 states, 22 states have (on average 292.72727272727275) internal successors, (6440), 22 states have internal predecessors, (6440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:21,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:56:21,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 850 [2023-11-17 15:56:21,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:56:40,035 INFO L124 PetriNetUnfolderBase]: 21616/34995 cut-off events. [2023-11-17 15:56:40,035 INFO L125 PetriNetUnfolderBase]: For 8558701/8558701 co-relation queries the response was YES. [2023-11-17 15:56:40,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 590943 conditions, 34995 events. 21616/34995 cut-off events. For 8558701/8558701 co-relation queries the response was YES. Maximal size of possible extension queue 1968. Compared 280563 event pairs, 2475 based on Foata normal form. 44/35003 useless extension candidates. Maximal degree in co-relation 590756. Up to 8550 conditions per place. [2023-11-17 15:56:41,093 INFO L140 encePairwiseOnDemand]: 839/850 looper letters, 950 selfloop transitions, 1019 changer transitions 151/2120 dead transitions. [2023-11-17 15:56:41,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 2120 transitions, 49062 flow [2023-11-17 15:56:41,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-17 15:56:41,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-17 15:56:41,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 10769 transitions. [2023-11-17 15:56:41,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519281045751634 [2023-11-17 15:56:41,101 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 10769 transitions. [2023-11-17 15:56:41,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 10769 transitions. [2023-11-17 15:56:41,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:56:41,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 10769 transitions. [2023-11-17 15:56:41,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 299.1388888888889) internal successors, (10769), 36 states have internal predecessors, (10769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:41,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 850.0) internal successors, (31450), 37 states have internal predecessors, (31450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:41,135 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 850.0) internal successors, (31450), 37 states have internal predecessors, (31450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:41,135 INFO L175 Difference]: Start difference. First operand has 463 places, 1439 transitions, 25509 flow. Second operand 36 states and 10769 transitions. [2023-11-17 15:56:41,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 2120 transitions, 49062 flow [2023-11-17 15:57:26,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 2120 transitions, 45467 flow, removed 1779 selfloop flow, removed 9 redundant places. [2023-11-17 15:57:26,700 INFO L231 Difference]: Finished difference. Result has 497 places, 1606 transitions, 30235 flow [2023-11-17 15:57:26,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=850, PETRI_DIFFERENCE_MINUEND_FLOW=23646, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=854, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=30235, PETRI_PLACES=497, PETRI_TRANSITIONS=1606} [2023-11-17 15:57:26,701 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 467 predicate places. [2023-11-17 15:57:26,702 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 1606 transitions, 30235 flow [2023-11-17 15:57:26,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 292.72727272727275) internal successors, (6440), 22 states have internal predecessors, (6440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:26,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:26,703 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 15:57:26,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-17 15:57:26,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-17 15:57:26,909 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 15:57:26,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:26,910 INFO L85 PathProgramCache]: Analyzing trace with hash -2029196093, now seen corresponding path program 11 times [2023-11-17 15:57:26,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:26,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388401179] [2023-11-17 15:57:26,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:26,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:26,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:27,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:57:27,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:27,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388401179] [2023-11-17 15:57:27,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388401179] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:27,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128188556] [2023-11-17 15:57:27,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 15:57:27,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:27,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:57:27,397 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 15:57:27,399 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 15:57:27,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 15:57:27,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:57:27,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 15:57:27,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:57:27,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 82 [2023-11-17 15:57:28,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:57:28,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:57:28,568 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:28,569 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 152 treesize of output 80 [2023-11-17 15:57:28,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:57:28,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128188556] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:57:28,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:57:28,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 25 [2023-11-17 15:57:28,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885759223] [2023-11-17 15:57:28,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:57:28,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 15:57:28,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:28,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 15:57:28,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2023-11-17 15:57:28,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 850 [2023-11-17 15:57:28,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 1606 transitions, 30235 flow. Second operand has 26 states, 26 states have (on average 276.3076923076923) internal successors, (7184), 26 states have internal predecessors, (7184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:28,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:28,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 850 [2023-11-17 15:57:28,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand