/usr/bin/java -Xmx16000000000 -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-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 13:34:37,587 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 13:34:37,633 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-VariableLbe.epf [2023-08-24 13:34:37,637 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 13:34:37,637 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 13:34:37,656 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 13:34:37,657 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 13:34:37,657 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 13:34:37,658 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 13:34:37,658 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 13:34:37,659 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 13:34:37,659 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 13:34:37,659 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 13:34:37,660 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 13:34:37,660 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 13:34:37,660 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 13:34:37,661 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 13:34:37,661 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 13:34:37,661 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 13:34:37,662 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 13:34:37,662 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 13:34:37,662 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 13:34:37,663 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 13:34:37,663 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 13:34:37,663 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 13:34:37,664 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 13:34:37,664 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 13:34:37,664 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 13:34:37,665 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 13:34:37,665 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 13:34:37,665 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 13:34:37,665 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 13:34:37,666 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 13:34:37,666 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 13:34:37,666 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 13:34:37,666 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 13:34:37,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 13:34:37,992 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 13:34:37,994 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 13:34:37,995 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 13:34:37,996 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 13:34:37,998 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c [2023-08-24 13:34:39,113 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 13:34:39,330 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 13:34:39,331 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c [2023-08-24 13:34:39,339 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/350fcebb2/81eb509bc9fb4cf1af9dd17655359aaf/FLAGe8f302dbb [2023-08-24 13:34:39,356 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/350fcebb2/81eb509bc9fb4cf1af9dd17655359aaf [2023-08-24 13:34:39,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 13:34:39,363 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 13:34:39,364 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 13:34:39,364 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 13:34:39,367 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 13:34:39,368 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 01:34:39" (1/1) ... [2023-08-24 13:34:39,369 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@547f5efe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:34:39, skipping insertion in model container [2023-08-24 13:34:39,369 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 01:34:39" (1/1) ... [2023-08-24 13:34:39,399 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 13:34:39,585 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c[2781,2794] [2023-08-24 13:34:39,590 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 13:34:39,600 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 13:34:39,638 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c[2781,2794] [2023-08-24 13:34:39,642 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 13:34:39,658 INFO L206 MainTranslator]: Completed translation [2023-08-24 13:34:39,660 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:34:39 WrapperNode [2023-08-24 13:34:39,660 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 13:34:39,661 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 13:34:39,661 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 13:34:39,661 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 13:34:39,666 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:34:39" (1/1) ... [2023-08-24 13:34:39,686 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:34:39" (1/1) ... [2023-08-24 13:34:39,726 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 290 [2023-08-24 13:34:39,727 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 13:34:39,727 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 13:34:39,727 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 13:34:39,728 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 13:34:39,738 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:34:39" (1/1) ... [2023-08-24 13:34:39,738 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:34:39" (1/1) ... [2023-08-24 13:34:39,750 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:34:39" (1/1) ... [2023-08-24 13:34:39,750 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:34:39" (1/1) ... [2023-08-24 13:34:39,770 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:34:39" (1/1) ... [2023-08-24 13:34:39,774 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:34:39" (1/1) ... [2023-08-24 13:34:39,778 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:34:39" (1/1) ... [2023-08-24 13:34:39,779 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:34:39" (1/1) ... [2023-08-24 13:34:39,782 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 13:34:39,782 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 13:34:39,783 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 13:34:39,783 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 13:34:39,789 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:34:39" (1/1) ... [2023-08-24 13:34:39,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 13:34:39,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:34:39,821 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) [2023-08-24 13:34:39,832 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 [2023-08-24 13:34:39,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 13:34:39,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 13:34:39,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 13:34:39,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 13:34:39,860 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 13:34:39,860 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 13:34:39,860 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 13:34:39,860 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 13:34:39,861 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 13:34:39,861 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 13:34:39,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 13:34:39,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 13:34:39,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 13:34:39,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 13:34:39,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 13:34:39,862 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 13:34:39,981 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 13:34:39,983 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 13:34:40,412 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 13:34:40,425 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 13:34:40,425 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-24 13:34:40,427 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 01:34:40 BoogieIcfgContainer [2023-08-24 13:34:40,427 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 13:34:40,429 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 13:34:40,429 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 13:34:40,432 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 13:34:40,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 01:34:39" (1/3) ... [2023-08-24 13:34:40,434 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45298ecd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 01:34:40, skipping insertion in model container [2023-08-24 13:34:40,434 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:34:39" (2/3) ... [2023-08-24 13:34:40,435 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45298ecd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 01:34:40, skipping insertion in model container [2023-08-24 13:34:40,435 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 01:34:40" (3/3) ... [2023-08-24 13:34:40,436 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-subst.wvr.c [2023-08-24 13:34:40,451 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 13:34:40,452 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 13:34:40,452 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 13:34:40,581 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 13:34:40,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 308 places, 327 transitions, 678 flow [2023-08-24 13:34:40,743 INFO L124 PetriNetUnfolderBase]: 29/324 cut-off events. [2023-08-24 13:34:40,744 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 13:34:40,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 324 events. 29/324 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 514 event pairs, 0 based on Foata normal form. 0/294 useless extension candidates. Maximal degree in co-relation 248. Up to 3 conditions per place. [2023-08-24 13:34:40,751 INFO L82 GeneralOperation]: Start removeDead. Operand has 308 places, 327 transitions, 678 flow [2023-08-24 13:34:40,756 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 295 places, 314 transitions, 646 flow [2023-08-24 13:34:40,759 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 13:34:40,767 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 295 places, 314 transitions, 646 flow [2023-08-24 13:34:40,769 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 295 places, 314 transitions, 646 flow [2023-08-24 13:34:40,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 295 places, 314 transitions, 646 flow [2023-08-24 13:34:40,824 INFO L124 PetriNetUnfolderBase]: 29/314 cut-off events. [2023-08-24 13:34:40,824 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 13:34:40,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 314 events. 29/314 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 513 event pairs, 0 based on Foata normal form. 0/285 useless extension candidates. Maximal degree in co-relation 248. Up to 3 conditions per place. [2023-08-24 13:34:40,834 INFO L119 LiptonReduction]: Number of co-enabled transitions 14784 [2023-08-24 13:34:49,663 INFO L134 LiptonReduction]: Checked pairs total: 15746 [2023-08-24 13:34:49,663 INFO L136 LiptonReduction]: Total number of compositions: 346 [2023-08-24 13:34:49,675 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 13:34:49,680 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=LoopsAndPotentialCycles, 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;@4e72b0b9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 13:34:49,680 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 13:34:49,691 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 13:34:49,692 INFO L124 PetriNetUnfolderBase]: 8/35 cut-off events. [2023-08-24 13:34:49,692 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 13:34:49,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:34:49,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:34:49,693 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)] === [2023-08-24 13:34:49,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:34:49,697 INFO L85 PathProgramCache]: Analyzing trace with hash 909240479, now seen corresponding path program 1 times [2023-08-24 13:34:49,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:34:49,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099867556] [2023-08-24 13:34:49,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:34:49,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:34:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:34:51,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:34:51,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:34:51,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099867556] [2023-08-24 13:34:51,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099867556] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:34:51,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:34:51,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-24 13:34:51,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133429881] [2023-08-24 13:34:51,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:34:51,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 13:34:51,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:34:51,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 13:34:51,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-08-24 13:34:51,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 673 [2023-08-24 13:34:51,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 90 flow. Second operand has 10 states, 10 states have (on average 233.2) internal successors, (2332), 10 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:34:51,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:34:51,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 673 [2023-08-24 13:34:51,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:34:52,515 INFO L124 PetriNetUnfolderBase]: 1929/2832 cut-off events. [2023-08-24 13:34:52,516 INFO L125 PetriNetUnfolderBase]: For 208/208 co-relation queries the response was YES. [2023-08-24 13:34:52,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5807 conditions, 2832 events. 1929/2832 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 12865 event pairs, 138 based on Foata normal form. 1/2203 useless extension candidates. Maximal degree in co-relation 3082. Up to 971 conditions per place. [2023-08-24 13:34:52,532 INFO L140 encePairwiseOnDemand]: 659/673 looper letters, 143 selfloop transitions, 23 changer transitions 3/170 dead transitions. [2023-08-24 13:34:52,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 170 transitions, 768 flow [2023-08-24 13:34:52,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 13:34:52,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 13:34:52,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3176 transitions. [2023-08-24 13:34:52,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36301291576180134 [2023-08-24 13:34:52,559 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3176 transitions. [2023-08-24 13:34:52,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3176 transitions. [2023-08-24 13:34:52,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:34:52,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3176 transitions. [2023-08-24 13:34:52,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 244.30769230769232) internal successors, (3176), 13 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:34:52,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 673.0) internal successors, (9422), 14 states have internal predecessors, (9422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:34:52,594 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 673.0) internal successors, (9422), 14 states have internal predecessors, (9422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:34:52,596 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 90 flow. Second operand 13 states and 3176 transitions. [2023-08-24 13:34:52,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 170 transitions, 768 flow [2023-08-24 13:34:52,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 170 transitions, 708 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-24 13:34:52,606 INFO L231 Difference]: Finished difference. Result has 52 places, 58 transitions, 236 flow [2023-08-24 13:34:52,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=236, PETRI_PLACES=52, PETRI_TRANSITIONS=58} [2023-08-24 13:34:52,611 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 14 predicate places. [2023-08-24 13:34:52,611 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 58 transitions, 236 flow [2023-08-24 13:34:52,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 233.2) internal successors, (2332), 10 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:34:52,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:34:52,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:34:52,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 13:34:52,614 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)] === [2023-08-24 13:34:52,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:34:52,621 INFO L85 PathProgramCache]: Analyzing trace with hash -2076716371, now seen corresponding path program 2 times [2023-08-24 13:34:52,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:34:52,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107844401] [2023-08-24 13:34:52,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:34:52,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:34:52,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:34:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:34:53,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:34:53,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107844401] [2023-08-24 13:34:53,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107844401] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:34:53,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:34:53,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-24 13:34:53,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603071429] [2023-08-24 13:34:53,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:34:53,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 13:34:53,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:34:53,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 13:34:53,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-08-24 13:34:53,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 673 [2023-08-24 13:34:53,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 58 transitions, 236 flow. Second operand has 10 states, 10 states have (on average 233.2) internal successors, (2332), 10 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:34:53,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:34:53,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 673 [2023-08-24 13:34:53,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:34:54,965 INFO L124 PetriNetUnfolderBase]: 4215/6142 cut-off events. [2023-08-24 13:34:54,966 INFO L125 PetriNetUnfolderBase]: For 4266/4284 co-relation queries the response was YES. [2023-08-24 13:34:54,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15441 conditions, 6142 events. 4215/6142 cut-off events. For 4266/4284 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 31783 event pairs, 474 based on Foata normal form. 2/4926 useless extension candidates. Maximal degree in co-relation 12571. Up to 2087 conditions per place. [2023-08-24 13:34:55,000 INFO L140 encePairwiseOnDemand]: 660/673 looper letters, 142 selfloop transitions, 35 changer transitions 3/181 dead transitions. [2023-08-24 13:34:55,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 181 transitions, 1002 flow [2023-08-24 13:34:55,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 13:34:55,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 13:34:55,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3157 transitions. [2023-08-24 13:34:55,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3608412389987427 [2023-08-24 13:34:55,010 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3157 transitions. [2023-08-24 13:34:55,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3157 transitions. [2023-08-24 13:34:55,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:34:55,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3157 transitions. [2023-08-24 13:34:55,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 242.84615384615384) internal successors, (3157), 13 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:34:55,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 673.0) internal successors, (9422), 14 states have internal predecessors, (9422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:34:55,036 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 673.0) internal successors, (9422), 14 states have internal predecessors, (9422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:34:55,037 INFO L175 Difference]: Start difference. First operand has 52 places, 58 transitions, 236 flow. Second operand 13 states and 3157 transitions. [2023-08-24 13:34:55,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 181 transitions, 1002 flow [2023-08-24 13:34:55,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 181 transitions, 996 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-24 13:34:55,056 INFO L231 Difference]: Finished difference. Result has 71 places, 82 transitions, 507 flow [2023-08-24 13:34:55,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=507, PETRI_PLACES=71, PETRI_TRANSITIONS=82} [2023-08-24 13:34:55,057 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 33 predicate places. [2023-08-24 13:34:55,058 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 82 transitions, 507 flow [2023-08-24 13:34:55,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 233.2) internal successors, (2332), 10 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:34:55,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:34:55,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:34:55,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 13:34:55,063 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)] === [2023-08-24 13:34:55,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:34:55,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1940526403, now seen corresponding path program 3 times [2023-08-24 13:34:55,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:34:55,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093568728] [2023-08-24 13:34:55,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:34:55,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:34:55,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:34:55,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:34:55,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:34:55,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093568728] [2023-08-24 13:34:55,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093568728] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:34:55,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:34:55,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-24 13:34:55,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143528219] [2023-08-24 13:34:55,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:34:55,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 13:34:55,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:34:55,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 13:34:55,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-08-24 13:34:55,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 673 [2023-08-24 13:34:55,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 82 transitions, 507 flow. Second operand has 10 states, 10 states have (on average 233.2) internal successors, (2332), 10 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:34:55,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:34:55,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 673 [2023-08-24 13:34:55,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:34:57,834 INFO L124 PetriNetUnfolderBase]: 8366/12045 cut-off events. [2023-08-24 13:34:57,834 INFO L125 PetriNetUnfolderBase]: For 17929/17957 co-relation queries the response was YES. [2023-08-24 13:34:57,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34586 conditions, 12045 events. 8366/12045 cut-off events. For 17929/17957 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 67448 event pairs, 1692 based on Foata normal form. 3/9675 useless extension candidates. Maximal degree in co-relation 31360. Up to 3371 conditions per place. [2023-08-24 13:34:58,001 INFO L140 encePairwiseOnDemand]: 660/673 looper letters, 193 selfloop transitions, 48 changer transitions 3/245 dead transitions. [2023-08-24 13:34:58,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 245 transitions, 1703 flow [2023-08-24 13:34:58,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 13:34:58,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 13:34:58,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2957 transitions. [2023-08-24 13:34:58,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3661466072313026 [2023-08-24 13:34:58,019 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2957 transitions. [2023-08-24 13:34:58,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2957 transitions. [2023-08-24 13:34:58,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:34:58,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2957 transitions. [2023-08-24 13:34:58,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 246.41666666666666) internal successors, (2957), 12 states have internal predecessors, (2957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:34:58,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 673.0) internal successors, (8749), 13 states have internal predecessors, (8749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:34:58,037 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 673.0) internal successors, (8749), 13 states have internal predecessors, (8749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:34:58,037 INFO L175 Difference]: Start difference. First operand has 71 places, 82 transitions, 507 flow. Second operand 12 states and 2957 transitions. [2023-08-24 13:34:58,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 245 transitions, 1703 flow [2023-08-24 13:34:58,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 245 transitions, 1652 flow, removed 21 selfloop flow, removed 3 redundant places. [2023-08-24 13:34:58,184 INFO L231 Difference]: Finished difference. Result has 83 places, 108 transitions, 878 flow [2023-08-24 13:34:58,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=878, PETRI_PLACES=83, PETRI_TRANSITIONS=108} [2023-08-24 13:34:58,186 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 45 predicate places. [2023-08-24 13:34:58,188 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 108 transitions, 878 flow [2023-08-24 13:34:58,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 233.2) internal successors, (2332), 10 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:34:58,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:34:58,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:34:58,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 13:34:58,190 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)] === [2023-08-24 13:34:58,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:34:58,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1446564611, now seen corresponding path program 4 times [2023-08-24 13:34:58,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:34:58,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898670763] [2023-08-24 13:34:58,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:34:58,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:34:58,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:34:58,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:34:58,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:34:58,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898670763] [2023-08-24 13:34:58,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898670763] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:34:58,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:34:58,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-24 13:34:58,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919392269] [2023-08-24 13:34:58,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:34:58,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 13:34:58,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:34:58,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 13:34:58,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-08-24 13:34:58,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 673 [2023-08-24 13:34:58,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 108 transitions, 878 flow. Second operand has 10 states, 10 states have (on average 233.2) internal successors, (2332), 10 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:34:58,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:34:58,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 673 [2023-08-24 13:34:58,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:35:00,646 INFO L124 PetriNetUnfolderBase]: 8476/12301 cut-off events. [2023-08-24 13:35:00,647 INFO L125 PetriNetUnfolderBase]: For 30053/30065 co-relation queries the response was YES. [2023-08-24 13:35:00,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38397 conditions, 12301 events. 8476/12301 cut-off events. For 30053/30065 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 70338 event pairs, 2738 based on Foata normal form. 1/9905 useless extension candidates. Maximal degree in co-relation 34998. Up to 8424 conditions per place. [2023-08-24 13:35:00,736 INFO L140 encePairwiseOnDemand]: 660/673 looper letters, 163 selfloop transitions, 46 changer transitions 3/213 dead transitions. [2023-08-24 13:35:00,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 213 transitions, 1770 flow [2023-08-24 13:35:00,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 13:35:00,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 13:35:00,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2686 transitions. [2023-08-24 13:35:00,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36282588139943267 [2023-08-24 13:35:00,743 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2686 transitions. [2023-08-24 13:35:00,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2686 transitions. [2023-08-24 13:35:00,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:35:00,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2686 transitions. [2023-08-24 13:35:00,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 244.1818181818182) internal successors, (2686), 11 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:00,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 673.0) internal successors, (8076), 12 states have internal predecessors, (8076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:00,760 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 673.0) internal successors, (8076), 12 states have internal predecessors, (8076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:00,760 INFO L175 Difference]: Start difference. First operand has 83 places, 108 transitions, 878 flow. Second operand 11 states and 2686 transitions. [2023-08-24 13:35:00,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 213 transitions, 1770 flow [2023-08-24 13:35:00,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 213 transitions, 1730 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-08-24 13:35:00,837 INFO L231 Difference]: Finished difference. Result has 94 places, 123 transitions, 1145 flow [2023-08-24 13:35:00,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1145, PETRI_PLACES=94, PETRI_TRANSITIONS=123} [2023-08-24 13:35:00,837 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 56 predicate places. [2023-08-24 13:35:00,838 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 123 transitions, 1145 flow [2023-08-24 13:35:00,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 233.2) internal successors, (2332), 10 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:00,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:35:00,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:35:00,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 13:35:00,839 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)] === [2023-08-24 13:35:00,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:35:00,840 INFO L85 PathProgramCache]: Analyzing trace with hash 2114265731, now seen corresponding path program 5 times [2023-08-24 13:35:00,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:35:00,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297243496] [2023-08-24 13:35:00,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:00,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:35:00,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:35:01,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:35:01,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297243496] [2023-08-24 13:35:01,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297243496] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:35:01,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:35:01,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-24 13:35:01,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670083908] [2023-08-24 13:35:01,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:35:01,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 13:35:01,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:35:01,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 13:35:01,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-08-24 13:35:01,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 673 [2023-08-24 13:35:01,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 123 transitions, 1145 flow. Second operand has 10 states, 10 states have (on average 233.2) internal successors, (2332), 10 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:01,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:35:01,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 673 [2023-08-24 13:35:01,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:35:03,292 INFO L124 PetriNetUnfolderBase]: 8961/13122 cut-off events. [2023-08-24 13:35:03,293 INFO L125 PetriNetUnfolderBase]: For 37959/37977 co-relation queries the response was YES. [2023-08-24 13:35:03,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42098 conditions, 13122 events. 8961/13122 cut-off events. For 37959/37977 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 77179 event pairs, 1800 based on Foata normal form. 6/10523 useless extension candidates. Maximal degree in co-relation 39654. Up to 5123 conditions per place. [2023-08-24 13:35:03,393 INFO L140 encePairwiseOnDemand]: 660/673 looper letters, 178 selfloop transitions, 51 changer transitions 1/231 dead transitions. [2023-08-24 13:35:03,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 231 transitions, 2137 flow [2023-08-24 13:35:03,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 13:35:03,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 13:35:03,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2685 transitions. [2023-08-24 13:35:03,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36269080102661083 [2023-08-24 13:35:03,400 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2685 transitions. [2023-08-24 13:35:03,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2685 transitions. [2023-08-24 13:35:03,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:35:03,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2685 transitions. [2023-08-24 13:35:03,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 244.0909090909091) internal successors, (2685), 11 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:03,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 673.0) internal successors, (8076), 12 states have internal predecessors, (8076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:03,538 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 673.0) internal successors, (8076), 12 states have internal predecessors, (8076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:03,539 INFO L175 Difference]: Start difference. First operand has 94 places, 123 transitions, 1145 flow. Second operand 11 states and 2685 transitions. [2023-08-24 13:35:03,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 231 transitions, 2137 flow [2023-08-24 13:35:03,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 231 transitions, 2087 flow, removed 22 selfloop flow, removed 2 redundant places. [2023-08-24 13:35:03,664 INFO L231 Difference]: Finished difference. Result has 106 places, 136 transitions, 1434 flow [2023-08-24 13:35:03,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=1111, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1434, PETRI_PLACES=106, PETRI_TRANSITIONS=136} [2023-08-24 13:35:03,665 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 68 predicate places. [2023-08-24 13:35:03,665 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 136 transitions, 1434 flow [2023-08-24 13:35:03,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 233.2) internal successors, (2332), 10 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:03,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:35:03,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:35:03,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 13:35:03,666 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)] === [2023-08-24 13:35:03,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:35:03,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1896008387, now seen corresponding path program 6 times [2023-08-24 13:35:03,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:35:03,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510363096] [2023-08-24 13:35:03,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:03,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:35:03,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:04,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:35:04,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:35:04,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510363096] [2023-08-24 13:35:04,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510363096] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:35:04,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:35:04,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-24 13:35:04,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760062446] [2023-08-24 13:35:04,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:35:04,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 13:35:04,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:35:04,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 13:35:04,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-08-24 13:35:04,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 673 [2023-08-24 13:35:04,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 136 transitions, 1434 flow. Second operand has 10 states, 10 states have (on average 233.2) internal successors, (2332), 10 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:04,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:35:04,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 673 [2023-08-24 13:35:04,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:35:06,348 INFO L124 PetriNetUnfolderBase]: 8961/13094 cut-off events. [2023-08-24 13:35:06,349 INFO L125 PetriNetUnfolderBase]: For 48878/48896 co-relation queries the response was YES. [2023-08-24 13:35:06,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45765 conditions, 13094 events. 8961/13094 cut-off events. For 48878/48896 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 76641 event pairs, 2828 based on Foata normal form. 3/10496 useless extension candidates. Maximal degree in co-relation 43161. Up to 8734 conditions per place. [2023-08-24 13:35:06,450 INFO L140 encePairwiseOnDemand]: 660/673 looper letters, 176 selfloop transitions, 55 changer transitions 6/238 dead transitions. [2023-08-24 13:35:06,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 238 transitions, 2390 flow [2023-08-24 13:35:06,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 13:35:06,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 13:35:06,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2922 transitions. [2023-08-24 13:35:06,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36181277860326894 [2023-08-24 13:35:06,459 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2922 transitions. [2023-08-24 13:35:06,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2922 transitions. [2023-08-24 13:35:06,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:35:06,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2922 transitions. [2023-08-24 13:35:06,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 243.5) internal successors, (2922), 12 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:06,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 673.0) internal successors, (8749), 13 states have internal predecessors, (8749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:06,478 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 673.0) internal successors, (8749), 13 states have internal predecessors, (8749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:06,478 INFO L175 Difference]: Start difference. First operand has 106 places, 136 transitions, 1434 flow. Second operand 12 states and 2922 transitions. [2023-08-24 13:35:06,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 238 transitions, 2390 flow [2023-08-24 13:35:06,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 238 transitions, 2343 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-08-24 13:35:06,688 INFO L231 Difference]: Finished difference. Result has 116 places, 143 transitions, 1655 flow [2023-08-24 13:35:06,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=1393, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1655, PETRI_PLACES=116, PETRI_TRANSITIONS=143} [2023-08-24 13:35:06,690 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 78 predicate places. [2023-08-24 13:35:06,691 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 143 transitions, 1655 flow [2023-08-24 13:35:06,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 233.2) internal successors, (2332), 10 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:06,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:35:06,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:35:06,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 13:35:06,692 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)] === [2023-08-24 13:35:06,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:35:06,692 INFO L85 PathProgramCache]: Analyzing trace with hash -46747917, now seen corresponding path program 7 times [2023-08-24 13:35:06,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:35:06,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090854045] [2023-08-24 13:35:06,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:06,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:35:06,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:07,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:35:07,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:35:07,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090854045] [2023-08-24 13:35:07,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090854045] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:35:07,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:35:07,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-24 13:35:07,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4045019] [2023-08-24 13:35:07,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:35:07,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 13:35:07,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:35:07,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 13:35:07,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-08-24 13:35:07,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 673 [2023-08-24 13:35:07,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 143 transitions, 1655 flow. Second operand has 10 states, 10 states have (on average 233.2) internal successors, (2332), 10 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:07,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:35:07,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 673 [2023-08-24 13:35:07,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:35:09,086 INFO L124 PetriNetUnfolderBase]: 8041/11991 cut-off events. [2023-08-24 13:35:09,086 INFO L125 PetriNetUnfolderBase]: For 53001/53007 co-relation queries the response was YES. [2023-08-24 13:35:09,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41939 conditions, 11991 events. 8041/11991 cut-off events. For 53001/53007 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 72059 event pairs, 1852 based on Foata normal form. 312/9870 useless extension candidates. Maximal degree in co-relation 39924. Up to 4418 conditions per place. [2023-08-24 13:35:09,154 INFO L140 encePairwiseOnDemand]: 660/673 looper letters, 166 selfloop transitions, 58 changer transitions 3/228 dead transitions. [2023-08-24 13:35:09,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 228 transitions, 2406 flow [2023-08-24 13:35:09,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 13:35:09,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 13:35:09,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2685 transitions. [2023-08-24 13:35:09,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36269080102661083 [2023-08-24 13:35:09,162 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2685 transitions. [2023-08-24 13:35:09,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2685 transitions. [2023-08-24 13:35:09,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:35:09,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2685 transitions. [2023-08-24 13:35:09,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 244.0909090909091) internal successors, (2685), 11 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:09,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 673.0) internal successors, (8076), 12 states have internal predecessors, (8076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:09,176 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 673.0) internal successors, (8076), 12 states have internal predecessors, (8076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:09,176 INFO L175 Difference]: Start difference. First operand has 116 places, 143 transitions, 1655 flow. Second operand 11 states and 2685 transitions. [2023-08-24 13:35:09,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 228 transitions, 2406 flow [2023-08-24 13:35:09,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 228 transitions, 2299 flow, removed 23 selfloop flow, removed 6 redundant places. [2023-08-24 13:35:09,481 INFO L231 Difference]: Finished difference. Result has 123 places, 142 transitions, 1736 flow [2023-08-24 13:35:09,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=1488, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1736, PETRI_PLACES=123, PETRI_TRANSITIONS=142} [2023-08-24 13:35:09,482 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 85 predicate places. [2023-08-24 13:35:09,482 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 142 transitions, 1736 flow [2023-08-24 13:35:09,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 233.2) internal successors, (2332), 10 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:09,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:35:09,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:35:09,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 13:35:09,484 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)] === [2023-08-24 13:35:09,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:35:09,484 INFO L85 PathProgramCache]: Analyzing trace with hash -396402351, now seen corresponding path program 1 times [2023-08-24 13:35:09,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:35:09,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393207733] [2023-08-24 13:35:09,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:09,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:35:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:09,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:35:09,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:35:09,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393207733] [2023-08-24 13:35:09,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393207733] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:35:09,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390468405] [2023-08-24 13:35:09,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:09,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:35:09,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:35:09,625 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) [2023-08-24 13:35:09,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 13:35:09,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:09,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 13:35:09,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:35:09,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:35:09,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:35:09,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:35:09,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390468405] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 13:35:09,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 13:35:09,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 11 [2023-08-24 13:35:09,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239667380] [2023-08-24 13:35:09,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:35:09,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 13:35:09,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:35:09,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 13:35:09,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-08-24 13:35:09,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 673 [2023-08-24 13:35:09,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 142 transitions, 1736 flow. Second operand has 6 states, 6 states have (on average 249.83333333333334) internal successors, (1499), 6 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:09,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:35:09,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 673 [2023-08-24 13:35:09,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:35:11,300 INFO L124 PetriNetUnfolderBase]: 8041/11903 cut-off events. [2023-08-24 13:35:11,300 INFO L125 PetriNetUnfolderBase]: For 64852/64874 co-relation queries the response was YES. [2023-08-24 13:35:11,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43225 conditions, 11903 events. 8041/11903 cut-off events. For 64852/64874 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 70475 event pairs, 3969 based on Foata normal form. 5/9461 useless extension candidates. Maximal degree in co-relation 41349. Up to 4657 conditions per place. [2023-08-24 13:35:11,378 INFO L140 encePairwiseOnDemand]: 664/673 looper letters, 195 selfloop transitions, 25 changer transitions 6/227 dead transitions. [2023-08-24 13:35:11,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 227 transitions, 2695 flow [2023-08-24 13:35:11,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 13:35:11,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 13:35:11,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1596 transitions. [2023-08-24 13:35:11,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952451708766716 [2023-08-24 13:35:11,383 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1596 transitions. [2023-08-24 13:35:11,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1596 transitions. [2023-08-24 13:35:11,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:35:11,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1596 transitions. [2023-08-24 13:35:11,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 266.0) internal successors, (1596), 6 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:11,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 673.0) internal successors, (4711), 7 states have internal predecessors, (4711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:11,391 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 673.0) internal successors, (4711), 7 states have internal predecessors, (4711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:11,391 INFO L175 Difference]: Start difference. First operand has 123 places, 142 transitions, 1736 flow. Second operand 6 states and 1596 transitions. [2023-08-24 13:35:11,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 227 transitions, 2695 flow [2023-08-24 13:35:11,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 227 transitions, 2582 flow, removed 11 selfloop flow, removed 8 redundant places. [2023-08-24 13:35:11,665 INFO L231 Difference]: Finished difference. Result has 122 places, 153 transitions, 1929 flow [2023-08-24 13:35:11,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=1634, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1929, PETRI_PLACES=122, PETRI_TRANSITIONS=153} [2023-08-24 13:35:11,665 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 84 predicate places. [2023-08-24 13:35:11,666 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 153 transitions, 1929 flow [2023-08-24 13:35:11,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 249.83333333333334) internal successors, (1499), 6 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:11,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:35:11,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:35:11,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-24 13:35:11,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:35:11,867 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)] === [2023-08-24 13:35:11,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:35:11,867 INFO L85 PathProgramCache]: Analyzing trace with hash -455917118, now seen corresponding path program 1 times [2023-08-24 13:35:11,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:35:11,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401564519] [2023-08-24 13:35:11,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:11,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:35:11,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:11,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:35:11,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:35:11,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401564519] [2023-08-24 13:35:11,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401564519] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:35:11,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88826440] [2023-08-24 13:35:11,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:11,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:35:11,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:35:12,001 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) [2023-08-24 13:35:12,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 13:35:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:12,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 13:35:12,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:35:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:35:12,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:35:12,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:35:12,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88826440] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 13:35:12,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 13:35:12,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2023-08-24 13:35:12,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642204076] [2023-08-24 13:35:12,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:35:12,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 13:35:12,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:35:12,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 13:35:12,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-08-24 13:35:12,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 673 [2023-08-24 13:35:12,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 153 transitions, 1929 flow. Second operand has 7 states, 7 states have (on average 249.28571428571428) internal successors, (1745), 7 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:12,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:35:12,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 673 [2023-08-24 13:35:12,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:35:13,946 INFO L124 PetriNetUnfolderBase]: 8922/13200 cut-off events. [2023-08-24 13:35:13,947 INFO L125 PetriNetUnfolderBase]: For 70185/70197 co-relation queries the response was YES. [2023-08-24 13:35:14,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47748 conditions, 13200 events. 8922/13200 cut-off events. For 70185/70197 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 79194 event pairs, 5487 based on Foata normal form. 1/10515 useless extension candidates. Maximal degree in co-relation 45852. Up to 10595 conditions per place. [2023-08-24 13:35:14,077 INFO L140 encePairwiseOnDemand]: 665/673 looper letters, 231 selfloop transitions, 10 changer transitions 6/248 dead transitions. [2023-08-24 13:35:14,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 248 transitions, 2921 flow [2023-08-24 13:35:14,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 13:35:14,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 13:35:14,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1843 transitions. [2023-08-24 13:35:14,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39121205688813415 [2023-08-24 13:35:14,082 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1843 transitions. [2023-08-24 13:35:14,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1843 transitions. [2023-08-24 13:35:14,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:35:14,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1843 transitions. [2023-08-24 13:35:14,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 263.2857142857143) internal successors, (1843), 7 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:14,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 673.0) internal successors, (5384), 8 states have internal predecessors, (5384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:14,092 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 673.0) internal successors, (5384), 8 states have internal predecessors, (5384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:14,092 INFO L175 Difference]: Start difference. First operand has 122 places, 153 transitions, 1929 flow. Second operand 7 states and 1843 transitions. [2023-08-24 13:35:14,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 248 transitions, 2921 flow [2023-08-24 13:35:14,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 248 transitions, 2888 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-08-24 13:35:14,396 INFO L231 Difference]: Finished difference. Result has 128 places, 159 transitions, 1984 flow [2023-08-24 13:35:14,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=1896, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1984, PETRI_PLACES=128, PETRI_TRANSITIONS=159} [2023-08-24 13:35:14,397 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 90 predicate places. [2023-08-24 13:35:14,397 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 159 transitions, 1984 flow [2023-08-24 13:35:14,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 249.28571428571428) internal successors, (1745), 7 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:14,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:35:14,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:35:14,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 13:35:14,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-08-24 13:35:14,604 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)] === [2023-08-24 13:35:14,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:35:14,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1106182260, now seen corresponding path program 1 times [2023-08-24 13:35:14,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:35:14,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397146103] [2023-08-24 13:35:14,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:14,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:35:14,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:15,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:35:15,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:35:15,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397146103] [2023-08-24 13:35:15,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397146103] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:35:15,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035915822] [2023-08-24 13:35:15,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:15,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:35:15,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:35:15,027 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) [2023-08-24 13:35:15,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 13:35:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:15,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-24 13:35:15,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:35:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:35:15,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:35:15,800 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:35:15,801 INFO L351 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 185 treesize of output 165 [2023-08-24 13:35:16,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:35:16,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035915822] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 13:35:16,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 13:35:16,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 7] total 23 [2023-08-24 13:35:16,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706317942] [2023-08-24 13:35:16,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:35:16,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 13:35:16,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:35:16,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 13:35:16,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2023-08-24 13:35:16,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 673 [2023-08-24 13:35:16,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 159 transitions, 1984 flow. Second operand has 9 states, 9 states have (on average 236.55555555555554) internal successors, (2129), 9 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:16,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:35:16,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 673 [2023-08-24 13:35:16,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:35:17,961 INFO L124 PetriNetUnfolderBase]: 9270/13774 cut-off events. [2023-08-24 13:35:17,961 INFO L125 PetriNetUnfolderBase]: For 71158/71164 co-relation queries the response was YES. [2023-08-24 13:35:18,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49694 conditions, 13774 events. 9270/13774 cut-off events. For 71158/71164 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 84324 event pairs, 2564 based on Foata normal form. 59/11072 useless extension candidates. Maximal degree in co-relation 47973. Up to 7475 conditions per place. [2023-08-24 13:35:18,037 INFO L140 encePairwiseOnDemand]: 661/673 looper letters, 245 selfloop transitions, 36 changer transitions 4/286 dead transitions. [2023-08-24 13:35:18,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 286 transitions, 3062 flow [2023-08-24 13:35:18,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 13:35:18,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 13:35:18,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2754 transitions. [2023-08-24 13:35:18,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37201134675131703 [2023-08-24 13:35:18,043 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2754 transitions. [2023-08-24 13:35:18,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2754 transitions. [2023-08-24 13:35:18,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:35:18,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2754 transitions. [2023-08-24 13:35:18,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 250.36363636363637) internal successors, (2754), 11 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:18,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 673.0) internal successors, (8076), 12 states have internal predecessors, (8076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:18,056 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 673.0) internal successors, (8076), 12 states have internal predecessors, (8076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:18,056 INFO L175 Difference]: Start difference. First operand has 128 places, 159 transitions, 1984 flow. Second operand 11 states and 2754 transitions. [2023-08-24 13:35:18,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 286 transitions, 3062 flow [2023-08-24 13:35:18,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 286 transitions, 3047 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-24 13:35:18,350 INFO L231 Difference]: Finished difference. Result has 139 places, 167 transitions, 2137 flow [2023-08-24 13:35:18,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=1969, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2137, PETRI_PLACES=139, PETRI_TRANSITIONS=167} [2023-08-24 13:35:18,351 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 101 predicate places. [2023-08-24 13:35:18,351 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 167 transitions, 2137 flow [2023-08-24 13:35:18,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 236.55555555555554) internal successors, (2129), 9 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:18,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:35:18,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:35:18,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 13:35:18,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:35:18,552 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)] === [2023-08-24 13:35:18,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:35:18,553 INFO L85 PathProgramCache]: Analyzing trace with hash 2068902834, now seen corresponding path program 2 times [2023-08-24 13:35:18,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:35:18,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602867026] [2023-08-24 13:35:18,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:18,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:35:18,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:19,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:35:19,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:35:19,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602867026] [2023-08-24 13:35:19,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602867026] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:35:19,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163316357] [2023-08-24 13:35:19,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 13:35:19,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:35:19,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:35:19,125 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) [2023-08-24 13:35:19,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 13:35:19,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-24 13:35:19,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:35:19,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-24 13:35:19,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:35:19,534 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:35:19,535 INFO L351 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 126 treesize of output 107 [2023-08-24 13:35:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 13:35:19,634 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 13:35:19,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163316357] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:35:19,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 13:35:19,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2023-08-24 13:35:19,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269305943] [2023-08-24 13:35:19,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:35:19,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 13:35:19,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:35:19,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 13:35:19,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2023-08-24 13:35:19,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 673 [2023-08-24 13:35:19,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 167 transitions, 2137 flow. Second operand has 9 states, 9 states have (on average 233.55555555555554) internal successors, (2102), 9 states have internal predecessors, (2102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:19,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:35:19,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 673 [2023-08-24 13:35:19,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:35:21,535 INFO L124 PetriNetUnfolderBase]: 9991/14873 cut-off events. [2023-08-24 13:35:21,536 INFO L125 PetriNetUnfolderBase]: For 88277/88327 co-relation queries the response was YES. [2023-08-24 13:35:21,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55197 conditions, 14873 events. 9991/14873 cut-off events. For 88277/88327 co-relation queries the response was YES. Maximal size of possible extension queue 780. Compared 92797 event pairs, 3002 based on Foata normal form. 87/11979 useless extension candidates. Maximal degree in co-relation 53425. Up to 7779 conditions per place. [2023-08-24 13:35:21,620 INFO L140 encePairwiseOnDemand]: 659/673 looper letters, 203 selfloop transitions, 61 changer transitions 3/268 dead transitions. [2023-08-24 13:35:21,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 268 transitions, 3169 flow [2023-08-24 13:35:21,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 13:35:21,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 13:35:21,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2689 transitions. [2023-08-24 13:35:21,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36323112251789813 [2023-08-24 13:35:21,624 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2689 transitions. [2023-08-24 13:35:21,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2689 transitions. [2023-08-24 13:35:21,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:35:21,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2689 transitions. [2023-08-24 13:35:21,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 244.45454545454547) internal successors, (2689), 11 states have internal predecessors, (2689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:21,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 673.0) internal successors, (8076), 12 states have internal predecessors, (8076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:21,636 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 673.0) internal successors, (8076), 12 states have internal predecessors, (8076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:21,636 INFO L175 Difference]: Start difference. First operand has 139 places, 167 transitions, 2137 flow. Second operand 11 states and 2689 transitions. [2023-08-24 13:35:21,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 268 transitions, 3169 flow [2023-08-24 13:35:22,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 268 transitions, 3073 flow, removed 33 selfloop flow, removed 4 redundant places. [2023-08-24 13:35:22,049 INFO L231 Difference]: Finished difference. Result has 149 places, 176 transitions, 2388 flow [2023-08-24 13:35:22,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=2077, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2388, PETRI_PLACES=149, PETRI_TRANSITIONS=176} [2023-08-24 13:35:22,050 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 111 predicate places. [2023-08-24 13:35:22,050 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 176 transitions, 2388 flow [2023-08-24 13:35:22,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 233.55555555555554) internal successors, (2102), 9 states have internal predecessors, (2102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:22,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:35:22,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:35:22,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 13:35:22,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:35:22,252 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)] === [2023-08-24 13:35:22,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:35:22,252 INFO L85 PathProgramCache]: Analyzing trace with hash -39025852, now seen corresponding path program 3 times [2023-08-24 13:35:22,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:35:22,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884309277] [2023-08-24 13:35:22,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:22,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:35:22,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:22,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:35:22,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:35:22,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884309277] [2023-08-24 13:35:22,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884309277] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:35:22,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747321841] [2023-08-24 13:35:22,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 13:35:22,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:35:22,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:35:22,679 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) [2023-08-24 13:35:22,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 13:35:22,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-24 13:35:22,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:35:22,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-24 13:35:22,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:35:23,022 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:35:23,023 INFO L351 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 126 treesize of output 107 [2023-08-24 13:35:23,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 13:35:23,163 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 13:35:23,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747321841] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:35:23,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 13:35:23,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2023-08-24 13:35:23,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712207585] [2023-08-24 13:35:23,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:35:23,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 13:35:23,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:35:23,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 13:35:23,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2023-08-24 13:35:23,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 673 [2023-08-24 13:35:23,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 176 transitions, 2388 flow. Second operand has 9 states, 9 states have (on average 233.55555555555554) internal successors, (2102), 9 states have internal predecessors, (2102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:23,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:35:23,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 673 [2023-08-24 13:35:23,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:35:25,013 INFO L124 PetriNetUnfolderBase]: 10101/15131 cut-off events. [2023-08-24 13:35:25,013 INFO L125 PetriNetUnfolderBase]: For 104064/104078 co-relation queries the response was YES. [2023-08-24 13:35:25,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56584 conditions, 15131 events. 10101/15131 cut-off events. For 104064/104078 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 95102 event pairs, 2864 based on Foata normal form. 171/12241 useless extension candidates. Maximal degree in co-relation 54645. Up to 7779 conditions per place. [2023-08-24 13:35:25,102 INFO L140 encePairwiseOnDemand]: 659/673 looper letters, 208 selfloop transitions, 56 changer transitions 3/268 dead transitions. [2023-08-24 13:35:25,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 268 transitions, 3297 flow [2023-08-24 13:35:25,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 13:35:25,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 13:35:25,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2687 transitions. [2023-08-24 13:35:25,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3629609617722545 [2023-08-24 13:35:25,108 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2687 transitions. [2023-08-24 13:35:25,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2687 transitions. [2023-08-24 13:35:25,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:35:25,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2687 transitions. [2023-08-24 13:35:25,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 244.27272727272728) internal successors, (2687), 11 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:25,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 673.0) internal successors, (8076), 12 states have internal predecessors, (8076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:25,118 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 673.0) internal successors, (8076), 12 states have internal predecessors, (8076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:25,118 INFO L175 Difference]: Start difference. First operand has 149 places, 176 transitions, 2388 flow. Second operand 11 states and 2687 transitions. [2023-08-24 13:35:25,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 268 transitions, 3297 flow [2023-08-24 13:35:25,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 268 transitions, 3242 flow, removed 13 selfloop flow, removed 4 redundant places. [2023-08-24 13:35:25,562 INFO L231 Difference]: Finished difference. Result has 159 places, 181 transitions, 2607 flow [2023-08-24 13:35:25,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=2337, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2607, PETRI_PLACES=159, PETRI_TRANSITIONS=181} [2023-08-24 13:35:25,563 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 121 predicate places. [2023-08-24 13:35:25,563 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 181 transitions, 2607 flow [2023-08-24 13:35:25,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 233.55555555555554) internal successors, (2102), 9 states have internal predecessors, (2102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:25,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:35:25,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:35:25,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 13:35:25,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-24 13:35:25,768 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)] === [2023-08-24 13:35:25,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:35:25,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1148756028, now seen corresponding path program 4 times [2023-08-24 13:35:25,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:35:25,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454782368] [2023-08-24 13:35:25,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:25,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:35:25,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:26,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:35:26,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:35:26,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454782368] [2023-08-24 13:35:26,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454782368] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:35:26,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898383960] [2023-08-24 13:35:26,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 13:35:26,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:35:26,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:35:26,118 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) [2023-08-24 13:35:26,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-24 13:35:26,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 13:35:26,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:35:26,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-24 13:35:26,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:35:26,393 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:35:26,394 INFO L351 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 137 treesize of output 134 [2023-08-24 13:35:26,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:35:26,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:35:27,235 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:35:27,236 INFO L351 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 185 treesize of output 165 [2023-08-24 13:35:27,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:35:27,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898383960] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 13:35:27,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 13:35:27,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 8] total 21 [2023-08-24 13:35:27,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295107310] [2023-08-24 13:35:27,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:35:27,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 13:35:27,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:35:27,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 13:35:27,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2023-08-24 13:35:27,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 673 [2023-08-24 13:35:27,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 181 transitions, 2607 flow. Second operand has 9 states, 9 states have (on average 226.55555555555554) internal successors, (2039), 9 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:27,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:35:27,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 673 [2023-08-24 13:35:27,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:35:31,519 INFO L124 PetriNetUnfolderBase]: 23046/33134 cut-off events. [2023-08-24 13:35:31,519 INFO L125 PetriNetUnfolderBase]: For 282557/282557 co-relation queries the response was YES. [2023-08-24 13:35:31,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132380 conditions, 33134 events. 23046/33134 cut-off events. For 282557/282557 co-relation queries the response was YES. Maximal size of possible extension queue 1573. Compared 215158 event pairs, 2442 based on Foata normal form. 2/26993 useless extension candidates. Maximal degree in co-relation 128596. Up to 11615 conditions per place. [2023-08-24 13:35:32,000 INFO L140 encePairwiseOnDemand]: 659/673 looper letters, 286 selfloop transitions, 179 changer transitions 1/466 dead transitions. [2023-08-24 13:35:32,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 466 transitions, 6259 flow [2023-08-24 13:35:32,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 13:35:32,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 13:35:32,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3120 transitions. [2023-08-24 13:35:32,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35661218424962854 [2023-08-24 13:35:32,004 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3120 transitions. [2023-08-24 13:35:32,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3120 transitions. [2023-08-24 13:35:32,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:35:32,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3120 transitions. [2023-08-24 13:35:32,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 240.0) internal successors, (3120), 13 states have internal predecessors, (3120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:32,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 673.0) internal successors, (9422), 14 states have internal predecessors, (9422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:32,016 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 673.0) internal successors, (9422), 14 states have internal predecessors, (9422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:32,016 INFO L175 Difference]: Start difference. First operand has 159 places, 181 transitions, 2607 flow. Second operand 13 states and 3120 transitions. [2023-08-24 13:35:32,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 466 transitions, 6259 flow [2023-08-24 13:35:34,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 466 transitions, 6106 flow, removed 40 selfloop flow, removed 7 redundant places. [2023-08-24 13:35:34,247 INFO L231 Difference]: Finished difference. Result has 172 places, 332 transitions, 5343 flow [2023-08-24 13:35:34,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=2531, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5343, PETRI_PLACES=172, PETRI_TRANSITIONS=332} [2023-08-24 13:35:34,248 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 134 predicate places. [2023-08-24 13:35:34,248 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 332 transitions, 5343 flow [2023-08-24 13:35:34,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 226.55555555555554) internal successors, (2039), 9 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:34,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:35:34,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:35:34,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-24 13:35:34,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:35:34,449 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)] === [2023-08-24 13:35:34,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:35:34,449 INFO L85 PathProgramCache]: Analyzing trace with hash -956010720, now seen corresponding path program 5 times [2023-08-24 13:35:34,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:35:34,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51001175] [2023-08-24 13:35:34,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:34,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:35:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:35,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:35:35,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:35:35,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51001175] [2023-08-24 13:35:35,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51001175] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:35:35,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201863884] [2023-08-24 13:35:35,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 13:35:35,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:35:35,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:35:35,062 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) [2023-08-24 13:35:35,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-24 13:35:35,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 13:35:35,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:35:35,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-24 13:35:35,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:35:35,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:35:35,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:35:35,673 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:35:35,674 INFO L351 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 185 treesize of output 165 [2023-08-24 13:35:35,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:35:35,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201863884] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 13:35:35,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 13:35:35,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 18 [2023-08-24 13:35:35,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702175026] [2023-08-24 13:35:35,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:35:35,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 13:35:35,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:35:35,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 13:35:35,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-08-24 13:35:35,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 673 [2023-08-24 13:35:35,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 332 transitions, 5343 flow. Second operand has 9 states, 9 states have (on average 236.55555555555554) internal successors, (2129), 9 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:35,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:35:35,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 673 [2023-08-24 13:35:35,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:35:40,312 INFO L124 PetriNetUnfolderBase]: 18585/27650 cut-off events. [2023-08-24 13:35:40,312 INFO L125 PetriNetUnfolderBase]: For 265377/265401 co-relation queries the response was YES. [2023-08-24 13:35:40,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129300 conditions, 27650 events. 18585/27650 cut-off events. For 265377/265401 co-relation queries the response was YES. Maximal size of possible extension queue 1504. Compared 188440 event pairs, 3774 based on Foata normal form. 3/25418 useless extension candidates. Maximal degree in co-relation 127248. Up to 16062 conditions per place. [2023-08-24 13:35:40,650 INFO L140 encePairwiseOnDemand]: 662/673 looper letters, 401 selfloop transitions, 53 changer transitions 9/464 dead transitions. [2023-08-24 13:35:40,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 464 transitions, 6875 flow [2023-08-24 13:35:40,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 13:35:40,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 13:35:40,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2750 transitions. [2023-08-24 13:35:40,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37147102526002973 [2023-08-24 13:35:40,655 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2750 transitions. [2023-08-24 13:35:40,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2750 transitions. [2023-08-24 13:35:40,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:35:40,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2750 transitions. [2023-08-24 13:35:40,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 250.0) internal successors, (2750), 11 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:40,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 673.0) internal successors, (8076), 12 states have internal predecessors, (8076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:40,664 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 673.0) internal successors, (8076), 12 states have internal predecessors, (8076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:40,664 INFO L175 Difference]: Start difference. First operand has 172 places, 332 transitions, 5343 flow. Second operand 11 states and 2750 transitions. [2023-08-24 13:35:40,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 464 transitions, 6875 flow [2023-08-24 13:35:44,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 464 transitions, 6546 flow, removed 124 selfloop flow, removed 2 redundant places. [2023-08-24 13:35:44,034 INFO L231 Difference]: Finished difference. Result has 181 places, 331 transitions, 5152 flow [2023-08-24 13:35:44,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=5050, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5152, PETRI_PLACES=181, PETRI_TRANSITIONS=331} [2023-08-24 13:35:44,035 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 143 predicate places. [2023-08-24 13:35:44,035 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 331 transitions, 5152 flow [2023-08-24 13:35:44,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 236.55555555555554) internal successors, (2129), 9 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:44,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:35:44,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:35:44,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-24 13:35:44,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:35:44,236 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)] === [2023-08-24 13:35:44,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:35:44,237 INFO L85 PathProgramCache]: Analyzing trace with hash 181885712, now seen corresponding path program 1 times [2023-08-24 13:35:44,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:35:44,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975674422] [2023-08-24 13:35:44,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:44,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:35:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:44,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 13:35:44,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:35:44,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975674422] [2023-08-24 13:35:44,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975674422] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:35:44,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343607501] [2023-08-24 13:35:44,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:44,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:35:44,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:35:44,357 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) [2023-08-24 13:35:44,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-24 13:35:44,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:44,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 13:35:44,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:35:44,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:35:44,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:35:44,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:35:44,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343607501] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 13:35:44,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 13:35:44,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 6] total 12 [2023-08-24 13:35:44,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87845996] [2023-08-24 13:35:44,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:35:44,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 13:35:44,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:35:44,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 13:35:44,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-08-24 13:35:44,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 673 [2023-08-24 13:35:44,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 331 transitions, 5152 flow. Second operand has 7 states, 7 states have (on average 245.42857142857142) internal successors, (1718), 7 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:44,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:35:44,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 673 [2023-08-24 13:35:44,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:35:49,038 INFO L124 PetriNetUnfolderBase]: 19353/28334 cut-off events. [2023-08-24 13:35:49,038 INFO L125 PetriNetUnfolderBase]: For 268185/268185 co-relation queries the response was YES. [2023-08-24 13:35:49,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131297 conditions, 28334 events. 19353/28334 cut-off events. For 268185/268185 co-relation queries the response was YES. Maximal size of possible extension queue 1448. Compared 190406 event pairs, 4556 based on Foata normal form. 0/26101 useless extension candidates. Maximal degree in co-relation 129297. Up to 10137 conditions per place. [2023-08-24 13:35:49,276 INFO L140 encePairwiseOnDemand]: 664/673 looper letters, 642 selfloop transitions, 20 changer transitions 6/669 dead transitions. [2023-08-24 13:35:49,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 669 transitions, 10136 flow [2023-08-24 13:35:49,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 13:35:49,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 13:35:49,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2340 transitions. [2023-08-24 13:35:49,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3863298662704309 [2023-08-24 13:35:49,278 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2340 transitions. [2023-08-24 13:35:49,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2340 transitions. [2023-08-24 13:35:49,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:35:49,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2340 transitions. [2023-08-24 13:35:49,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 260.0) internal successors, (2340), 9 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:49,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 673.0) internal successors, (6730), 10 states have internal predecessors, (6730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:49,285 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 673.0) internal successors, (6730), 10 states have internal predecessors, (6730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:49,285 INFO L175 Difference]: Start difference. First operand has 181 places, 331 transitions, 5152 flow. Second operand 9 states and 2340 transitions. [2023-08-24 13:35:49,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 669 transitions, 10136 flow [2023-08-24 13:35:50,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 669 transitions, 9921 flow, removed 16 selfloop flow, removed 6 redundant places. [2023-08-24 13:35:50,416 INFO L231 Difference]: Finished difference. Result has 184 places, 336 transitions, 5102 flow [2023-08-24 13:35:50,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=5038, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5102, PETRI_PLACES=184, PETRI_TRANSITIONS=336} [2023-08-24 13:35:50,416 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 146 predicate places. [2023-08-24 13:35:50,416 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 336 transitions, 5102 flow [2023-08-24 13:35:50,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 245.42857142857142) internal successors, (1718), 7 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:50,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:35:50,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:35:50,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-24 13:35:50,617 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,SelfDestructingSolverStorable14 [2023-08-24 13:35:50,618 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:35:50,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:35:50,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1849752245, now seen corresponding path program 1 times [2023-08-24 13:35:50,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:35:50,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583110785] [2023-08-24 13:35:50,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:50,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:35:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:50,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:35:50,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:35:50,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583110785] [2023-08-24 13:35:50,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583110785] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:35:50,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:35:50,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 13:35:50,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523138490] [2023-08-24 13:35:50,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:35:50,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 13:35:50,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:35:50,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 13:35:50,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 13:35:50,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 673 [2023-08-24 13:35:50,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 336 transitions, 5102 flow. Second operand has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:50,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:35:50,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 673 [2023-08-24 13:35:50,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:35:53,731 INFO L124 PetriNetUnfolderBase]: 11402/17406 cut-off events. [2023-08-24 13:35:53,732 INFO L125 PetriNetUnfolderBase]: For 174609/174672 co-relation queries the response was YES. [2023-08-24 13:35:53,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83663 conditions, 17406 events. 11402/17406 cut-off events. For 174609/174672 co-relation queries the response was YES. Maximal size of possible extension queue 877. Compared 114010 event pairs, 4732 based on Foata normal form. 832/18229 useless extension candidates. Maximal degree in co-relation 82068. Up to 9199 conditions per place. [2023-08-24 13:35:53,843 INFO L140 encePairwiseOnDemand]: 667/673 looper letters, 232 selfloop transitions, 23 changer transitions 71/327 dead transitions. [2023-08-24 13:35:53,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 327 transitions, 4853 flow [2023-08-24 13:35:53,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 13:35:53,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 13:35:53,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1567 transitions. [2023-08-24 13:35:53,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880633977216444 [2023-08-24 13:35:53,846 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1567 transitions. [2023-08-24 13:35:53,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1567 transitions. [2023-08-24 13:35:53,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:35:53,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1567 transitions. [2023-08-24 13:35:53,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 261.1666666666667) internal successors, (1567), 6 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:53,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 673.0) internal successors, (4711), 7 states have internal predecessors, (4711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:53,851 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 673.0) internal successors, (4711), 7 states have internal predecessors, (4711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:53,851 INFO L175 Difference]: Start difference. First operand has 184 places, 336 transitions, 5102 flow. Second operand 6 states and 1567 transitions. [2023-08-24 13:35:53,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 327 transitions, 4853 flow [2023-08-24 13:35:54,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 327 transitions, 4667 flow, removed 53 selfloop flow, removed 8 redundant places. [2023-08-24 13:35:54,798 INFO L231 Difference]: Finished difference. Result has 180 places, 202 transitions, 2678 flow [2023-08-24 13:35:54,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=3368, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2678, PETRI_PLACES=180, PETRI_TRANSITIONS=202} [2023-08-24 13:35:54,798 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 142 predicate places. [2023-08-24 13:35:54,798 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 202 transitions, 2678 flow [2023-08-24 13:35:54,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:54,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:35:54,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:35:54,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-24 13:35:54,799 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:35:54,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:35:54,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1313030814, now seen corresponding path program 1 times [2023-08-24 13:35:54,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:35:54,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219336242] [2023-08-24 13:35:54,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:54,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:35:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:54,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:35:54,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:35:54,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219336242] [2023-08-24 13:35:54,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219336242] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:35:54,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:35:54,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 13:35:54,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324327615] [2023-08-24 13:35:54,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:35:54,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 13:35:54,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:35:54,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 13:35:54,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 13:35:54,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 673 [2023-08-24 13:35:54,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 202 transitions, 2678 flow. Second operand has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:54,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:35:54,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 673 [2023-08-24 13:35:54,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:35:56,716 INFO L124 PetriNetUnfolderBase]: 8804/12712 cut-off events. [2023-08-24 13:35:56,716 INFO L125 PetriNetUnfolderBase]: For 127664/127664 co-relation queries the response was YES. [2023-08-24 13:35:56,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61835 conditions, 12712 events. 8804/12712 cut-off events. For 127664/127664 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 69571 event pairs, 4394 based on Foata normal form. 222/12934 useless extension candidates. Maximal degree in co-relation 61662. Up to 11427 conditions per place. [2023-08-24 13:35:56,808 INFO L140 encePairwiseOnDemand]: 667/673 looper letters, 109 selfloop transitions, 2 changer transitions 69/180 dead transitions. [2023-08-24 13:35:56,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 180 transitions, 2249 flow [2023-08-24 13:35:56,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 13:35:56,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 13:35:56,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1556 transitions. [2023-08-24 13:35:56,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853392768697375 [2023-08-24 13:35:56,811 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1556 transitions. [2023-08-24 13:35:56,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1556 transitions. [2023-08-24 13:35:56,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:35:56,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1556 transitions. [2023-08-24 13:35:56,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 259.3333333333333) internal successors, (1556), 6 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:56,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 673.0) internal successors, (4711), 7 states have internal predecessors, (4711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:56,816 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 673.0) internal successors, (4711), 7 states have internal predecessors, (4711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:56,816 INFO L175 Difference]: Start difference. First operand has 180 places, 202 transitions, 2678 flow. Second operand 6 states and 1556 transitions. [2023-08-24 13:35:56,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 180 transitions, 2249 flow [2023-08-24 13:35:57,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 180 transitions, 1961 flow, removed 81 selfloop flow, removed 23 redundant places. [2023-08-24 13:35:57,713 INFO L231 Difference]: Finished difference. Result has 159 places, 111 transitions, 890 flow [2023-08-24 13:35:57,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=1466, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=890, PETRI_PLACES=159, PETRI_TRANSITIONS=111} [2023-08-24 13:35:57,713 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 121 predicate places. [2023-08-24 13:35:57,713 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 111 transitions, 890 flow [2023-08-24 13:35:57,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:57,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:35:57,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:35:57,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-24 13:35:57,714 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:35:57,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:35:57,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1956145460, now seen corresponding path program 1 times [2023-08-24 13:35:57,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:35:57,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049280323] [2023-08-24 13:35:57,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:57,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:35:57,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:57,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 13:35:57,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:35:57,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049280323] [2023-08-24 13:35:57,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049280323] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:35:57,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:35:57,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 13:35:57,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35571023] [2023-08-24 13:35:57,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:35:57,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 13:35:57,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:35:57,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 13:35:57,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 13:35:57,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 673 [2023-08-24 13:35:57,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 111 transitions, 890 flow. Second operand has 5 states, 5 states have (on average 253.2) internal successors, (1266), 5 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:57,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:35:57,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 673 [2023-08-24 13:35:57,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:35:58,728 INFO L124 PetriNetUnfolderBase]: 4698/6873 cut-off events. [2023-08-24 13:35:58,728 INFO L125 PetriNetUnfolderBase]: For 52351/52375 co-relation queries the response was YES. [2023-08-24 13:35:58,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31136 conditions, 6873 events. 4698/6873 cut-off events. For 52351/52375 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 34754 event pairs, 1990 based on Foata normal form. 160/7033 useless extension candidates. Maximal degree in co-relation 31085. Up to 4880 conditions per place. [2023-08-24 13:35:58,764 INFO L140 encePairwiseOnDemand]: 666/673 looper letters, 87 selfloop transitions, 2 changer transitions 92/182 dead transitions. [2023-08-24 13:35:58,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 182 transitions, 1723 flow [2023-08-24 13:35:58,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 13:35:58,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 13:35:58,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1566 transitions. [2023-08-24 13:35:58,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38781575037147104 [2023-08-24 13:35:58,767 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1566 transitions. [2023-08-24 13:35:58,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1566 transitions. [2023-08-24 13:35:58,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:35:58,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1566 transitions. [2023-08-24 13:35:58,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 261.0) internal successors, (1566), 6 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:58,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 673.0) internal successors, (4711), 7 states have internal predecessors, (4711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:58,772 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 673.0) internal successors, (4711), 7 states have internal predecessors, (4711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:58,772 INFO L175 Difference]: Start difference. First operand has 159 places, 111 transitions, 890 flow. Second operand 6 states and 1566 transitions. [2023-08-24 13:35:58,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 182 transitions, 1723 flow [2023-08-24 13:35:58,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 182 transitions, 1474 flow, removed 105 selfloop flow, removed 30 redundant places. [2023-08-24 13:35:58,925 INFO L231 Difference]: Finished difference. Result has 83 places, 90 transitions, 560 flow [2023-08-24 13:35:58,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=560, PETRI_PLACES=83, PETRI_TRANSITIONS=90} [2023-08-24 13:35:58,925 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 45 predicate places. [2023-08-24 13:35:58,925 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 90 transitions, 560 flow [2023-08-24 13:35:58,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 253.2) internal successors, (1266), 5 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:58,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:35:58,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:35:58,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-24 13:35:58,926 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:35:58,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:35:58,927 INFO L85 PathProgramCache]: Analyzing trace with hash -79031171, now seen corresponding path program 1 times [2023-08-24 13:35:58,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:35:58,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195545786] [2023-08-24 13:35:58,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:58,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:35:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:59,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 13:35:59,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:35:59,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195545786] [2023-08-24 13:35:59,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195545786] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:35:59,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287000163] [2023-08-24 13:35:59,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:59,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:35:59,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:35:59,335 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) [2023-08-24 13:35:59,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-24 13:35:59,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:59,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-24 13:35:59,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:35:59,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:35:59,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:36:00,050 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:36:00,050 INFO L351 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 185 treesize of output 165 [2023-08-24 13:36:00,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:36:00,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287000163] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:36:00,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:36:00,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2023-08-24 13:36:00,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179299148] [2023-08-24 13:36:00,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:36:00,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 13:36:00,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:36:00,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 13:36:00,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2023-08-24 13:36:00,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 673 [2023-08-24 13:36:00,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 90 transitions, 560 flow. Second operand has 28 states, 28 states have (on average 233.78571428571428) internal successors, (6546), 28 states have internal predecessors, (6546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:00,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:36:00,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 673 [2023-08-24 13:36:00,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:36:02,968 INFO L124 PetriNetUnfolderBase]: 8671/12737 cut-off events. [2023-08-24 13:36:02,968 INFO L125 PetriNetUnfolderBase]: For 31429/31465 co-relation queries the response was YES. [2023-08-24 13:36:03,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44627 conditions, 12737 events. 8671/12737 cut-off events. For 31429/31465 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 73935 event pairs, 808 based on Foata normal form. 351/13086 useless extension candidates. Maximal degree in co-relation 44600. Up to 2829 conditions per place. [2023-08-24 13:36:03,159 INFO L140 encePairwiseOnDemand]: 659/673 looper letters, 382 selfloop transitions, 97 changer transitions 20/500 dead transitions. [2023-08-24 13:36:03,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 500 transitions, 3520 flow [2023-08-24 13:36:03,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-24 13:36:03,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-24 13:36:03,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 7555 transitions. [2023-08-24 13:36:03,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36212433494703544 [2023-08-24 13:36:03,168 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 7555 transitions. [2023-08-24 13:36:03,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 7555 transitions. [2023-08-24 13:36:03,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:36:03,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 7555 transitions. [2023-08-24 13:36:03,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 243.70967741935485) internal successors, (7555), 31 states have internal predecessors, (7555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:03,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 673.0) internal successors, (21536), 32 states have internal predecessors, (21536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:03,195 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 673.0) internal successors, (21536), 32 states have internal predecessors, (21536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:03,195 INFO L175 Difference]: Start difference. First operand has 83 places, 90 transitions, 560 flow. Second operand 31 states and 7555 transitions. [2023-08-24 13:36:03,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 500 transitions, 3520 flow [2023-08-24 13:36:03,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 500 transitions, 3479 flow, removed 14 selfloop flow, removed 5 redundant places. [2023-08-24 13:36:03,364 INFO L231 Difference]: Finished difference. Result has 117 places, 165 transitions, 1557 flow [2023-08-24 13:36:03,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=547, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1557, PETRI_PLACES=117, PETRI_TRANSITIONS=165} [2023-08-24 13:36:03,364 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 79 predicate places. [2023-08-24 13:36:03,364 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 165 transitions, 1557 flow [2023-08-24 13:36:03,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 233.78571428571428) internal successors, (6546), 28 states have internal predecessors, (6546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:03,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:36:03,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:36:03,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-24 13:36:03,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:36:03,566 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:36:03,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:36:03,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1242087901, now seen corresponding path program 2 times [2023-08-24 13:36:03,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:36:03,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038179524] [2023-08-24 13:36:03,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:36:03,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:36:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:36:03,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 13:36:03,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:36:03,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038179524] [2023-08-24 13:36:03,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038179524] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:36:03,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636469392] [2023-08-24 13:36:03,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 13:36:03,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:36:03,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:36:03,948 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) [2023-08-24 13:36:03,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-24 13:36:04,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-24 13:36:04,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:36:04,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-24 13:36:04,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:36:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 13:36:04,297 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 13:36:04,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636469392] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:36:04,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 13:36:04,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 16 [2023-08-24 13:36:04,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597577937] [2023-08-24 13:36:04,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:36:04,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 13:36:04,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:36:04,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 13:36:04,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-08-24 13:36:04,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 673 [2023-08-24 13:36:04,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 165 transitions, 1557 flow. Second operand has 9 states, 9 states have (on average 233.88888888888889) internal successors, (2105), 9 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:04,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:36:04,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 673 [2023-08-24 13:36:04,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:36:05,836 INFO L124 PetriNetUnfolderBase]: 9897/14668 cut-off events. [2023-08-24 13:36:05,836 INFO L125 PetriNetUnfolderBase]: For 74202/74274 co-relation queries the response was YES. [2023-08-24 13:36:05,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58878 conditions, 14668 events. 9897/14668 cut-off events. For 74202/74274 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 89812 event pairs, 1842 based on Foata normal form. 214/14880 useless extension candidates. Maximal degree in co-relation 58839. Up to 5832 conditions per place. [2023-08-24 13:36:05,930 INFO L140 encePairwiseOnDemand]: 661/673 looper letters, 201 selfloop transitions, 65 changer transitions 4/271 dead transitions. [2023-08-24 13:36:05,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 271 transitions, 2695 flow [2023-08-24 13:36:05,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 13:36:05,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 13:36:05,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2683 transitions. [2023-08-24 13:36:05,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36242064028096715 [2023-08-24 13:36:05,932 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2683 transitions. [2023-08-24 13:36:05,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2683 transitions. [2023-08-24 13:36:05,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:36:05,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2683 transitions. [2023-08-24 13:36:05,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 243.9090909090909) internal successors, (2683), 11 states have internal predecessors, (2683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:05,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 673.0) internal successors, (8076), 12 states have internal predecessors, (8076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:05,940 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 673.0) internal successors, (8076), 12 states have internal predecessors, (8076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:05,940 INFO L175 Difference]: Start difference. First operand has 117 places, 165 transitions, 1557 flow. Second operand 11 states and 2683 transitions. [2023-08-24 13:36:05,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 271 transitions, 2695 flow [2023-08-24 13:36:06,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 271 transitions, 2440 flow, removed 107 selfloop flow, removed 7 redundant places. [2023-08-24 13:36:06,519 INFO L231 Difference]: Finished difference. Result has 123 places, 180 transitions, 1719 flow [2023-08-24 13:36:06,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=1344, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1719, PETRI_PLACES=123, PETRI_TRANSITIONS=180} [2023-08-24 13:36:06,520 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 85 predicate places. [2023-08-24 13:36:06,520 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 180 transitions, 1719 flow [2023-08-24 13:36:06,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 233.88888888888889) internal successors, (2105), 9 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:06,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:36:06,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:36:06,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-24 13:36:06,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:36:06,721 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:36:06,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:36:06,721 INFO L85 PathProgramCache]: Analyzing trace with hash 924936227, now seen corresponding path program 3 times [2023-08-24 13:36:06,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:36:06,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406018051] [2023-08-24 13:36:06,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:36:06,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:36:06,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:36:07,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 13:36:07,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:36:07,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406018051] [2023-08-24 13:36:07,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406018051] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:36:07,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629761066] [2023-08-24 13:36:07,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 13:36:07,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:36:07,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:36:07,145 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) [2023-08-24 13:36:07,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-24 13:36:07,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-24 13:36:07,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:36:07,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-24 13:36:07,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:36:07,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 13:36:07,475 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 13:36:07,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629761066] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:36:07,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 13:36:07,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 17 [2023-08-24 13:36:07,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375390538] [2023-08-24 13:36:07,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:36:07,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 13:36:07,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:36:07,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 13:36:07,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2023-08-24 13:36:07,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 673 [2023-08-24 13:36:07,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 180 transitions, 1719 flow. Second operand has 9 states, 9 states have (on average 233.88888888888889) internal successors, (2105), 9 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:07,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:36:07,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 673 [2023-08-24 13:36:07,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:36:09,171 INFO L124 PetriNetUnfolderBase]: 10209/15340 cut-off events. [2023-08-24 13:36:09,171 INFO L125 PetriNetUnfolderBase]: For 89866/89866 co-relation queries the response was YES. [2023-08-24 13:36:09,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60001 conditions, 15340 events. 10209/15340 cut-off events. For 89866/89866 co-relation queries the response was YES. Maximal size of possible extension queue 787. Compared 96469 event pairs, 1930 based on Foata normal form. 446/15784 useless extension candidates. Maximal degree in co-relation 59961. Up to 5832 conditions per place. [2023-08-24 13:36:09,270 INFO L140 encePairwiseOnDemand]: 661/673 looper letters, 224 selfloop transitions, 64 changer transitions 5/294 dead transitions. [2023-08-24 13:36:09,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 294 transitions, 3069 flow [2023-08-24 13:36:09,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 13:36:09,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 13:36:09,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2681 transitions. [2023-08-24 13:36:09,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36215047953532353 [2023-08-24 13:36:09,273 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2681 transitions. [2023-08-24 13:36:09,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2681 transitions. [2023-08-24 13:36:09,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:36:09,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2681 transitions. [2023-08-24 13:36:09,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 243.72727272727272) internal successors, (2681), 11 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:09,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 673.0) internal successors, (8076), 12 states have internal predecessors, (8076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:09,281 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 673.0) internal successors, (8076), 12 states have internal predecessors, (8076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:09,281 INFO L175 Difference]: Start difference. First operand has 123 places, 180 transitions, 1719 flow. Second operand 11 states and 2681 transitions. [2023-08-24 13:36:09,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 294 transitions, 3069 flow [2023-08-24 13:36:10,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 294 transitions, 2801 flow, removed 86 selfloop flow, removed 7 redundant places. [2023-08-24 13:36:10,223 INFO L231 Difference]: Finished difference. Result has 129 places, 200 transitions, 2033 flow [2023-08-24 13:36:10,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=1547, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2033, PETRI_PLACES=129, PETRI_TRANSITIONS=200} [2023-08-24 13:36:10,223 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 91 predicate places. [2023-08-24 13:36:10,223 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 200 transitions, 2033 flow [2023-08-24 13:36:10,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 233.88888888888889) internal successors, (2105), 9 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:10,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:36:10,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:36:10,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-24 13:36:10,424 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,SelfDestructingSolverStorable20 [2023-08-24 13:36:10,425 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:36:10,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:36:10,425 INFO L85 PathProgramCache]: Analyzing trace with hash -438276189, now seen corresponding path program 4 times [2023-08-24 13:36:10,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:36:10,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842956937] [2023-08-24 13:36:10,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:36:10,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:36:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:36:10,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 13:36:10,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:36:10,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842956937] [2023-08-24 13:36:10,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842956937] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:36:10,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164973778] [2023-08-24 13:36:10,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 13:36:10,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:36:10,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:36:10,789 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) [2023-08-24 13:36:10,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-24 13:36:10,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 13:36:10,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:36:10,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-24 13:36:10,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:36:11,002 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:36:11,002 INFO L351 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 144 treesize of output 141 [2023-08-24 13:36:11,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 13:36:11,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:36:11,639 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:36:11,640 INFO L351 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 182 treesize of output 162 [2023-08-24 13:36:11,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 13:36:11,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164973778] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:36:11,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:36:11,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2023-08-24 13:36:11,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341079927] [2023-08-24 13:36:11,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:36:11,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 13:36:11,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:36:11,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 13:36:11,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2023-08-24 13:36:11,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 673 [2023-08-24 13:36:11,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 200 transitions, 2033 flow. Second operand has 22 states, 22 states have (on average 220.0) internal successors, (4840), 22 states have internal predecessors, (4840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:11,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:36:11,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 673 [2023-08-24 13:36:11,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:36:20,453 INFO L124 PetriNetUnfolderBase]: 23835/34646 cut-off events. [2023-08-24 13:36:20,453 INFO L125 PetriNetUnfolderBase]: For 239793/239793 co-relation queries the response was YES. [2023-08-24 13:36:20,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144650 conditions, 34646 events. 23835/34646 cut-off events. For 239793/239793 co-relation queries the response was YES. Maximal size of possible extension queue 1505. Compared 226706 event pairs, 1200 based on Foata normal form. 16/34660 useless extension candidates. Maximal degree in co-relation 144607. Up to 4517 conditions per place. [2023-08-24 13:36:20,735 INFO L140 encePairwiseOnDemand]: 653/673 looper letters, 692 selfloop transitions, 425 changer transitions 47/1164 dead transitions. [2023-08-24 13:36:20,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 1164 transitions, 10360 flow [2023-08-24 13:36:20,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-08-24 13:36:20,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-08-24 13:36:20,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 14898 transitions. [2023-08-24 13:36:20,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34056463595839526 [2023-08-24 13:36:20,750 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 14898 transitions. [2023-08-24 13:36:20,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 14898 transitions. [2023-08-24 13:36:20,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:36:20,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 14898 transitions. [2023-08-24 13:36:20,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 229.2) internal successors, (14898), 65 states have internal predecessors, (14898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:20,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 673.0) internal successors, (44418), 66 states have internal predecessors, (44418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:20,803 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 673.0) internal successors, (44418), 66 states have internal predecessors, (44418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:20,803 INFO L175 Difference]: Start difference. First operand has 129 places, 200 transitions, 2033 flow. Second operand 65 states and 14898 transitions. [2023-08-24 13:36:20,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 1164 transitions, 10360 flow [2023-08-24 13:36:22,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 1164 transitions, 10262 flow, removed 33 selfloop flow, removed 5 redundant places. [2023-08-24 13:36:22,632 INFO L231 Difference]: Finished difference. Result has 231 places, 551 transitions, 7097 flow [2023-08-24 13:36:22,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=1978, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=7097, PETRI_PLACES=231, PETRI_TRANSITIONS=551} [2023-08-24 13:36:22,632 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 193 predicate places. [2023-08-24 13:36:22,632 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 551 transitions, 7097 flow [2023-08-24 13:36:22,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 220.0) internal successors, (4840), 22 states have internal predecessors, (4840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:22,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:36:22,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:36:22,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-24 13:36:22,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-24 13:36:22,834 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:36:22,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:36:22,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1784615122, now seen corresponding path program 1 times [2023-08-24 13:36:22,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:36:22,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542400424] [2023-08-24 13:36:22,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:36:22,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:36:22,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:36:23,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 13:36:23,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:36:23,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542400424] [2023-08-24 13:36:23,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542400424] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:36:23,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:36:23,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-24 13:36:23,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294510675] [2023-08-24 13:36:23,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:36:23,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 13:36:23,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:36:23,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 13:36:23,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-08-24 13:36:23,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 673 [2023-08-24 13:36:23,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 551 transitions, 7097 flow. Second operand has 10 states, 10 states have (on average 241.7) internal successors, (2417), 10 states have internal predecessors, (2417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:23,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:36:23,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 673 [2023-08-24 13:36:23,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:36:31,745 INFO L124 PetriNetUnfolderBase]: 30265/44146 cut-off events. [2023-08-24 13:36:31,746 INFO L125 PetriNetUnfolderBase]: For 591369/591369 co-relation queries the response was YES. [2023-08-24 13:36:32,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239638 conditions, 44146 events. 30265/44146 cut-off events. For 591369/591369 co-relation queries the response was YES. Maximal size of possible extension queue 1923. Compared 306679 event pairs, 8310 based on Foata normal form. 26/44170 useless extension candidates. Maximal degree in co-relation 239552. Up to 23028 conditions per place. [2023-08-24 13:36:32,369 INFO L140 encePairwiseOnDemand]: 665/673 looper letters, 664 selfloop transitions, 25 changer transitions 751/1440 dead transitions. [2023-08-24 13:36:32,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 1440 transitions, 21206 flow [2023-08-24 13:36:32,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 13:36:32,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 13:36:32,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2038 transitions. [2023-08-24 13:36:32,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37852897473997027 [2023-08-24 13:36:32,371 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2038 transitions. [2023-08-24 13:36:32,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2038 transitions. [2023-08-24 13:36:32,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:36:32,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2038 transitions. [2023-08-24 13:36:32,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 254.75) internal successors, (2038), 8 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:32,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 673.0) internal successors, (6057), 9 states have internal predecessors, (6057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:32,377 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 673.0) internal successors, (6057), 9 states have internal predecessors, (6057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:32,377 INFO L175 Difference]: Start difference. First operand has 231 places, 551 transitions, 7097 flow. Second operand 8 states and 2038 transitions. [2023-08-24 13:36:32,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 1440 transitions, 21206 flow [2023-08-24 13:36:41,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 1440 transitions, 18107 flow, removed 1404 selfloop flow, removed 10 redundant places. [2023-08-24 13:36:41,583 INFO L231 Difference]: Finished difference. Result has 231 places, 486 transitions, 5228 flow [2023-08-24 13:36:41,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=5924, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5228, PETRI_PLACES=231, PETRI_TRANSITIONS=486} [2023-08-24 13:36:41,584 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 193 predicate places. [2023-08-24 13:36:41,584 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 486 transitions, 5228 flow [2023-08-24 13:36:41,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 241.7) internal successors, (2417), 10 states have internal predecessors, (2417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:41,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:36:41,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:36:41,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-24 13:36:41,584 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:36:41,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:36:41,585 INFO L85 PathProgramCache]: Analyzing trace with hash 970942446, now seen corresponding path program 1 times [2023-08-24 13:36:41,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:36:41,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305723498] [2023-08-24 13:36:41,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:36:41,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:36:41,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:36:41,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 13:36:41,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:36:41,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305723498] [2023-08-24 13:36:41,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305723498] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:36:41,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631478689] [2023-08-24 13:36:41,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:36:41,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:36:41,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:36:41,733 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:36:41,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-24 13:36:41,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:36:41,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 13:36:41,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:36:41,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 13:36:41,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:36:42,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 13:36:42,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631478689] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 13:36:42,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 13:36:42,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2023-08-24 13:36:42,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592975572] [2023-08-24 13:36:42,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:36:42,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 13:36:42,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:36:42,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 13:36:42,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-24 13:36:42,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 673 [2023-08-24 13:36:42,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 486 transitions, 5228 flow. Second operand has 7 states, 7 states have (on average 245.85714285714286) internal successors, (1721), 7 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:42,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:36:42,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 673 [2023-08-24 13:36:42,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:36:48,355 INFO L124 PetriNetUnfolderBase]: 24949/36266 cut-off events. [2023-08-24 13:36:48,355 INFO L125 PetriNetUnfolderBase]: For 348791/348791 co-relation queries the response was YES. [2023-08-24 13:36:48,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183248 conditions, 36266 events. 24949/36266 cut-off events. For 348791/348791 co-relation queries the response was YES. Maximal size of possible extension queue 1614. Compared 239717 event pairs, 7164 based on Foata normal form. 764/37028 useless extension candidates. Maximal degree in co-relation 183161. Up to 15810 conditions per place. [2023-08-24 13:36:48,800 INFO L140 encePairwiseOnDemand]: 664/673 looper letters, 452 selfloop transitions, 124 changer transitions 4/580 dead transitions. [2023-08-24 13:36:48,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 580 transitions, 7255 flow [2023-08-24 13:36:48,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 13:36:48,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 13:36:48,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2042 transitions. [2023-08-24 13:36:48,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3792719167904903 [2023-08-24 13:36:48,803 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2042 transitions. [2023-08-24 13:36:48,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2042 transitions. [2023-08-24 13:36:48,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:36:48,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2042 transitions. [2023-08-24 13:36:48,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 255.25) internal successors, (2042), 8 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:48,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 673.0) internal successors, (6057), 9 states have internal predecessors, (6057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:48,809 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 673.0) internal successors, (6057), 9 states have internal predecessors, (6057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:48,809 INFO L175 Difference]: Start difference. First operand has 231 places, 486 transitions, 5228 flow. Second operand 8 states and 2042 transitions. [2023-08-24 13:36:48,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 580 transitions, 7255 flow [2023-08-24 13:36:52,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 580 transitions, 7085 flow, removed 60 selfloop flow, removed 13 redundant places. [2023-08-24 13:36:52,346 INFO L231 Difference]: Finished difference. Result has 215 places, 475 transitions, 5483 flow [2023-08-24 13:36:52,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=4877, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5483, PETRI_PLACES=215, PETRI_TRANSITIONS=475} [2023-08-24 13:36:52,347 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 177 predicate places. [2023-08-24 13:36:52,347 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 475 transitions, 5483 flow [2023-08-24 13:36:52,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 245.85714285714286) internal successors, (1721), 7 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:52,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:36:52,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:36:52,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-24 13:36:52,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-24 13:36:52,548 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:36:52,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:36:52,548 INFO L85 PathProgramCache]: Analyzing trace with hash -415258428, now seen corresponding path program 2 times [2023-08-24 13:36:52,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:36:52,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247007983] [2023-08-24 13:36:52,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:36:52,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:36:52,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:36:52,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 13:36:52,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:36:52,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247007983] [2023-08-24 13:36:52,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247007983] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:36:52,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:36:52,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-24 13:36:52,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309149618] [2023-08-24 13:36:52,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:36:52,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 13:36:52,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:36:52,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 13:36:52,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-08-24 13:36:52,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 673 [2023-08-24 13:36:52,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 475 transitions, 5483 flow. Second operand has 10 states, 10 states have (on average 239.7) internal successors, (2397), 10 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:52,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:36:52,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 673 [2023-08-24 13:36:52,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:36:59,129 INFO L124 PetriNetUnfolderBase]: 24949/36254 cut-off events. [2023-08-24 13:36:59,129 INFO L125 PetriNetUnfolderBase]: For 349274/349274 co-relation queries the response was YES. [2023-08-24 13:36:59,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187082 conditions, 36254 events. 24949/36254 cut-off events. For 349274/349274 co-relation queries the response was YES. Maximal size of possible extension queue 1617. Compared 245066 event pairs, 6554 based on Foata normal form. 12/36264 useless extension candidates. Maximal degree in co-relation 187005. Up to 16292 conditions per place. [2023-08-24 13:36:59,636 INFO L140 encePairwiseOnDemand]: 666/673 looper letters, 595 selfloop transitions, 21 changer transitions 540/1156 dead transitions. [2023-08-24 13:36:59,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 1156 transitions, 15818 flow [2023-08-24 13:36:59,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 13:36:59,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 13:36:59,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1760 transitions. [2023-08-24 13:36:59,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3735937168329442 [2023-08-24 13:36:59,638 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1760 transitions. [2023-08-24 13:36:59,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1760 transitions. [2023-08-24 13:36:59,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:36:59,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1760 transitions. [2023-08-24 13:36:59,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 251.42857142857142) internal successors, (1760), 7 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:59,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 673.0) internal successors, (5384), 8 states have internal predecessors, (5384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:59,641 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 673.0) internal successors, (5384), 8 states have internal predecessors, (5384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:59,642 INFO L175 Difference]: Start difference. First operand has 215 places, 475 transitions, 5483 flow. Second operand 7 states and 1760 transitions. [2023-08-24 13:36:59,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 1156 transitions, 15818 flow [2023-08-24 13:37:02,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 1156 transitions, 15739 flow, removed 30 selfloop flow, removed 4 redundant places. [2023-08-24 13:37:02,692 INFO L231 Difference]: Finished difference. Result has 218 places, 421 transitions, 4931 flow [2023-08-24 13:37:02,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=5430, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4931, PETRI_PLACES=218, PETRI_TRANSITIONS=421} [2023-08-24 13:37:02,693 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 180 predicate places. [2023-08-24 13:37:02,693 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 421 transitions, 4931 flow [2023-08-24 13:37:02,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 239.7) internal successors, (2397), 10 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:37:02,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:37:02,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:37:02,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-24 13:37:02,694 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:37:02,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:37:02,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1456683034, now seen corresponding path program 1 times [2023-08-24 13:37:02,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:37:02,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345311216] [2023-08-24 13:37:02,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:37:02,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:37:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:37:03,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 13:37:03,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:37:03,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345311216] [2023-08-24 13:37:03,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345311216] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:37:03,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179900789] [2023-08-24 13:37:03,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:37:03,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:37:03,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:37:03,817 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:37:03,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-24 13:37:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:37:03,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-24 13:37:03,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:37:04,178 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 13:37:04,274 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 13:37:04,357 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 13:37:04,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:37:04,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:37:04,569 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 13:37:04,569 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2023-08-24 13:37:04,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 13:37:04,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:37:05,966 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:37:05,966 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 67 [2023-08-24 13:37:06,001 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:37:06,001 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19533 treesize of output 18478 [2023-08-24 13:37:06,087 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:37:06,087 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1373 treesize of output 1349 [2023-08-24 13:37:06,127 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:37:06,128 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1325 treesize of output 1253 [2023-08-24 13:37:06,160 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:37:06,160 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1014 treesize of output 895 [2023-08-24 13:37:13,287 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:37:13,287 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 266 treesize of output 158 [2023-08-24 13:37:13,340 INFO L322 Elim1Store]: treesize reduction 15, result has 55.9 percent of original size [2023-08-24 13:37:13,341 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19452 treesize of output 18414 [2023-08-24 13:37:13,619 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:37:13,620 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 4502 treesize of output 4014 [2023-08-24 13:37:13,705 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:37:13,706 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 4252 treesize of output 3988 [2023-08-24 13:37:13,826 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:37:13,827 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 3964 treesize of output 3844 [2023-08-24 13:39:27,675 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:39:27,676 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 67 [2023-08-24 13:39:27,738 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:39:27,738 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20141 treesize of output 19022 [2023-08-24 13:39:27,831 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:39:27,831 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1373 treesize of output 1349 [2023-08-24 13:39:27,878 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:39:27,878 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1325 treesize of output 1253 [2023-08-24 13:39:27,918 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:39:27,918 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1014 treesize of output 895 [2023-08-24 13:39:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 13:39:50,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179900789] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:39:50,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:39:50,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 42 [2023-08-24 13:39:50,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230208105] [2023-08-24 13:39:50,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:39:50,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-24 13:39:50,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:39:50,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-24 13:39:50,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1582, Unknown=15, NotChecked=0, Total=1806 [2023-08-24 13:39:50,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 673 [2023-08-24 13:39:50,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 421 transitions, 4931 flow. Second operand has 43 states, 43 states have (on average 190.6046511627907) internal successors, (8196), 43 states have internal predecessors, (8196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:39:50,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:39:50,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 673 [2023-08-24 13:39:50,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:40:00,407 INFO L124 PetriNetUnfolderBase]: 27049/39482 cut-off events. [2023-08-24 13:40:00,407 INFO L125 PetriNetUnfolderBase]: For 395273/395273 co-relation queries the response was YES. [2023-08-24 13:40:00,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213288 conditions, 39482 events. 27049/39482 cut-off events. For 395273/395273 co-relation queries the response was YES. Maximal size of possible extension queue 1477. Compared 262592 event pairs, 4707 based on Foata normal form. 464/39944 useless extension candidates. Maximal degree in co-relation 213211. Up to 9810 conditions per place. [2023-08-24 13:40:00,909 INFO L140 encePairwiseOnDemand]: 657/673 looper letters, 917 selfloop transitions, 122 changer transitions 1/1040 dead transitions. [2023-08-24 13:40:00,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 1040 transitions, 13579 flow [2023-08-24 13:40:00,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 13:40:00,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 13:40:00,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4220 transitions. [2023-08-24 13:40:00,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29859194792330007 [2023-08-24 13:40:00,913 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4220 transitions. [2023-08-24 13:40:00,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4220 transitions. [2023-08-24 13:40:00,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:40:00,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4220 transitions. [2023-08-24 13:40:00,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 200.95238095238096) internal successors, (4220), 21 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:40:00,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 673.0) internal successors, (14806), 22 states have internal predecessors, (14806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:40:00,921 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 673.0) internal successors, (14806), 22 states have internal predecessors, (14806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:40:00,922 INFO L175 Difference]: Start difference. First operand has 218 places, 421 transitions, 4931 flow. Second operand 21 states and 4220 transitions. [2023-08-24 13:40:00,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 1040 transitions, 13579 flow [2023-08-24 13:40:04,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 1040 transitions, 12998 flow, removed 126 selfloop flow, removed 14 redundant places. [2023-08-24 13:40:04,096 INFO L231 Difference]: Finished difference. Result has 227 places, 506 transitions, 6283 flow [2023-08-24 13:40:04,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=4712, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6283, PETRI_PLACES=227, PETRI_TRANSITIONS=506} [2023-08-24 13:40:04,096 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 189 predicate places. [2023-08-24 13:40:04,097 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 506 transitions, 6283 flow [2023-08-24 13:40:04,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 190.6046511627907) internal successors, (8196), 43 states have internal predecessors, (8196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:40:04,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:40:04,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:40:04,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-24 13:40:04,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:40:04,303 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:40:04,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:40:04,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1972060880, now seen corresponding path program 2 times [2023-08-24 13:40:04,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:40:04,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962637181] [2023-08-24 13:40:04,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:40:04,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:40:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:40:04,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 13:40:04,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:40:04,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962637181] [2023-08-24 13:40:04,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962637181] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:40:04,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695510966] [2023-08-24 13:40:04,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 13:40:04,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:40:04,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:40:04,928 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:40:04,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-24 13:40:05,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 13:40:05,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:40:05,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-24 13:40:05,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:40:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 13:40:05,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:40:05,817 INFO L322 Elim1Store]: treesize reduction 22, result has 75.0 percent of original size [2023-08-24 13:40:05,818 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 74 [2023-08-24 13:40:05,964 INFO L322 Elim1Store]: treesize reduction 26, result has 87.3 percent of original size [2023-08-24 13:40:05,964 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 200 [2023-08-24 13:40:06,937 INFO L322 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-08-24 13:40:06,937 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 9 [2023-08-24 13:40:07,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 13:40:07,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695510966] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:40:07,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:40:07,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 33 [2023-08-24 13:40:07,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413857429] [2023-08-24 13:40:07,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:40:07,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 13:40:07,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:40:07,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 13:40:07,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2023-08-24 13:40:07,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 673 [2023-08-24 13:40:07,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 506 transitions, 6283 flow. Second operand has 33 states, 33 states have (on average 202.12121212121212) internal successors, (6670), 33 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:40:07,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:40:07,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 673 [2023-08-24 13:40:07,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:40:16,509 INFO L124 PetriNetUnfolderBase]: 31939/46294 cut-off events. [2023-08-24 13:40:16,510 INFO L125 PetriNetUnfolderBase]: For 585282/585282 co-relation queries the response was YES. [2023-08-24 13:40:17,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284438 conditions, 46294 events. 31939/46294 cut-off events. For 585282/585282 co-relation queries the response was YES. Maximal size of possible extension queue 1807. Compared 309789 event pairs, 11854 based on Foata normal form. 36/46330 useless extension candidates. Maximal degree in co-relation 284358. Up to 26956 conditions per place. [2023-08-24 13:40:17,203 INFO L140 encePairwiseOnDemand]: 656/673 looper letters, 794 selfloop transitions, 120 changer transitions 13/927 dead transitions. [2023-08-24 13:40:17,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 927 transitions, 13496 flow [2023-08-24 13:40:17,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 13:40:17,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 13:40:17,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3146 transitions. [2023-08-24 13:40:17,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3116394254581476 [2023-08-24 13:40:17,206 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3146 transitions. [2023-08-24 13:40:17,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3146 transitions. [2023-08-24 13:40:17,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:40:17,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3146 transitions. [2023-08-24 13:40:17,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 209.73333333333332) internal successors, (3146), 15 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:40:17,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 673.0) internal successors, (10768), 16 states have internal predecessors, (10768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:40:17,212 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 673.0) internal successors, (10768), 16 states have internal predecessors, (10768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:40:17,213 INFO L175 Difference]: Start difference. First operand has 227 places, 506 transitions, 6283 flow. Second operand 15 states and 3146 transitions. [2023-08-24 13:40:17,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 927 transitions, 13496 flow [2023-08-24 13:40:22,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 927 transitions, 13158 flow, removed 154 selfloop flow, removed 7 redundant places. [2023-08-24 13:40:22,711 INFO L231 Difference]: Finished difference. Result has 240 places, 578 transitions, 7636 flow [2023-08-24 13:40:22,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=6083, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7636, PETRI_PLACES=240, PETRI_TRANSITIONS=578} [2023-08-24 13:40:22,712 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 202 predicate places. [2023-08-24 13:40:22,712 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 578 transitions, 7636 flow [2023-08-24 13:40:22,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 202.12121212121212) internal successors, (6670), 33 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:40:22,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:40:22,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:40:22,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-24 13:40:22,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-24 13:40:22,921 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:40:22,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:40:22,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1907530866, now seen corresponding path program 1 times [2023-08-24 13:40:22,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:40:22,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11597417] [2023-08-24 13:40:22,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:40:22,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:40:22,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:40:23,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 13:40:23,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:40:23,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11597417] [2023-08-24 13:40:23,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11597417] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:40:23,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:40:23,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 13:40:23,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640335556] [2023-08-24 13:40:23,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:40:23,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 13:40:23,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:40:23,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 13:40:23,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 13:40:23,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 673 [2023-08-24 13:40:23,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 578 transitions, 7636 flow. Second operand has 5 states, 5 states have (on average 253.8) internal successors, (1269), 5 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:40:23,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:40:23,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 673 [2023-08-24 13:40:23,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:40:30,304 INFO L124 PetriNetUnfolderBase]: 26963/39026 cut-off events. [2023-08-24 13:40:30,304 INFO L125 PetriNetUnfolderBase]: For 492324/492324 co-relation queries the response was YES. [2023-08-24 13:40:30,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248101 conditions, 39026 events. 26963/39026 cut-off events. For 492324/492324 co-relation queries the response was YES. Maximal size of possible extension queue 1526. Compared 253667 event pairs, 10656 based on Foata normal form. 348/39374 useless extension candidates. Maximal degree in co-relation 248018. Up to 36705 conditions per place. [2023-08-24 13:40:31,023 INFO L140 encePairwiseOnDemand]: 668/673 looper letters, 419 selfloop transitions, 4 changer transitions 67/490 dead transitions. [2023-08-24 13:40:31,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 490 transitions, 7315 flow [2023-08-24 13:40:31,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 13:40:31,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 13:40:31,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1306 transitions. [2023-08-24 13:40:31,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38811292719167906 [2023-08-24 13:40:31,025 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1306 transitions. [2023-08-24 13:40:31,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1306 transitions. [2023-08-24 13:40:31,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:40:31,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1306 transitions. [2023-08-24 13:40:31,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 261.2) internal successors, (1306), 5 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:40:31,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 673.0) internal successors, (4038), 6 states have internal predecessors, (4038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:40:31,028 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 673.0) internal successors, (4038), 6 states have internal predecessors, (4038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:40:31,028 INFO L175 Difference]: Start difference. First operand has 240 places, 578 transitions, 7636 flow. Second operand 5 states and 1306 transitions. [2023-08-24 13:40:31,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 490 transitions, 7315 flow [2023-08-24 13:40:35,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 490 transitions, 6898 flow, removed 75 selfloop flow, removed 19 redundant places. [2023-08-24 13:40:35,356 INFO L231 Difference]: Finished difference. Result has 216 places, 423 transitions, 5348 flow [2023-08-24 13:40:35,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=5725, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5348, PETRI_PLACES=216, PETRI_TRANSITIONS=423} [2023-08-24 13:40:35,356 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 178 predicate places. [2023-08-24 13:40:35,356 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 423 transitions, 5348 flow [2023-08-24 13:40:35,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 253.8) internal successors, (1269), 5 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:40:35,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:40:35,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:40:35,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-24 13:40:35,357 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:40:35,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:40:35,357 INFO L85 PathProgramCache]: Analyzing trace with hash -408370924, now seen corresponding path program 3 times [2023-08-24 13:40:35,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:40:35,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209336747] [2023-08-24 13:40:35,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:40:35,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:40:35,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:40:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 13:40:36,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:40:36,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209336747] [2023-08-24 13:40:36,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209336747] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:40:36,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686283976] [2023-08-24 13:40:36,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 13:40:36,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:40:36,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:40:36,148 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:40:36,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-24 13:40:36,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 13:40:36,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:40:36,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-24 13:40:36,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:40:36,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:40:36,769 INFO L351 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 14 treesize of output 16 [2023-08-24 13:40:37,256 INFO L322 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-08-24 13:40:37,257 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 94 [2023-08-24 13:40:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:40:37,298 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:40:39,031 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:40:39,032 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 119 treesize of output 154 [2023-08-24 13:40:39,055 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:40:39,055 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 97 [2023-08-24 13:40:39,524 INFO L322 Elim1Store]: treesize reduction 19, result has 84.3 percent of original size [2023-08-24 13:40:39,524 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 322 treesize of output 335 [2023-08-24 13:40:39,561 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:40:39,562 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 234 treesize of output 252 [2023-08-24 13:40:49,564 INFO L322 Elim1Store]: treesize reduction 19, result has 84.3 percent of original size [2023-08-24 13:40:49,564 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 257 treesize of output 286 [2023-08-24 13:40:49,600 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:40:49,600 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 185 treesize of output 211 [2023-08-24 13:40:57,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:40:57,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686283976] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:40:57,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:40:57,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 46 [2023-08-24 13:40:57,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562803641] [2023-08-24 13:40:57,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:40:57,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-08-24 13:40:57,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:40:57,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-08-24 13:40:57,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1904, Unknown=15, NotChecked=0, Total=2162 [2023-08-24 13:40:57,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 673 [2023-08-24 13:40:57,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 423 transitions, 5348 flow. Second operand has 47 states, 47 states have (on average 186.85106382978722) internal successors, (8782), 47 states have internal predecessors, (8782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:40:57,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:40:57,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 673 [2023-08-24 13:40:57,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:41:35,196 INFO L124 PetriNetUnfolderBase]: 91121/132764 cut-off events. [2023-08-24 13:41:35,196 INFO L125 PetriNetUnfolderBase]: For 1507506/1507506 co-relation queries the response was YES. [2023-08-24 13:41:37,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 807012 conditions, 132764 events. 91121/132764 cut-off events. For 1507506/1507506 co-relation queries the response was YES. Maximal size of possible extension queue 5503. Compared 1029370 event pairs, 15227 based on Foata normal form. 592/133356 useless extension candidates. Maximal degree in co-relation 806938. Up to 23644 conditions per place. [2023-08-24 13:41:37,765 INFO L140 encePairwiseOnDemand]: 650/673 looper letters, 1991 selfloop transitions, 441 changer transitions 4/2436 dead transitions. [2023-08-24 13:41:37,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 2436 transitions, 34225 flow [2023-08-24 13:41:37,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-08-24 13:41:37,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-08-24 13:41:37,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 11194 transitions. [2023-08-24 13:41:37,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29180678293058054 [2023-08-24 13:41:37,773 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 11194 transitions. [2023-08-24 13:41:37,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 11194 transitions. [2023-08-24 13:41:37,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:41:37,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 11194 transitions. [2023-08-24 13:41:37,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 196.3859649122807) internal successors, (11194), 57 states have internal predecessors, (11194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:41:37,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 673.0) internal successors, (39034), 58 states have internal predecessors, (39034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:41:37,803 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 673.0) internal successors, (39034), 58 states have internal predecessors, (39034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:41:37,803 INFO L175 Difference]: Start difference. First operand has 216 places, 423 transitions, 5348 flow. Second operand 57 states and 11194 transitions. [2023-08-24 13:41:37,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 2436 transitions, 34225 flow [2023-08-24 13:42:24,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 2436 transitions, 33213 flow, removed 277 selfloop flow, removed 15 redundant places. [2023-08-24 13:42:24,247 INFO L231 Difference]: Finished difference. Result has 260 places, 847 transitions, 12270 flow [2023-08-24 13:42:24,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=5197, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=12270, PETRI_PLACES=260, PETRI_TRANSITIONS=847} [2023-08-24 13:42:24,248 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 222 predicate places. [2023-08-24 13:42:24,248 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 847 transitions, 12270 flow [2023-08-24 13:42:24,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 186.85106382978722) internal successors, (8782), 47 states have internal predecessors, (8782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:24,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:42:24,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:42:24,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-24 13:42:24,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-24 13:42:24,451 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:42:24,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:42:24,451 INFO L85 PathProgramCache]: Analyzing trace with hash 865920106, now seen corresponding path program 4 times [2023-08-24 13:42:24,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:42:24,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104821679] [2023-08-24 13:42:24,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:42:24,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:42:24,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:42:24,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 13:42:24,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:42:24,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104821679] [2023-08-24 13:42:24,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104821679] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:42:24,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230633378] [2023-08-24 13:42:24,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 13:42:24,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:42:24,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:42:25,000 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:42:25,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-24 13:42:25,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 13:42:25,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:42:25,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-24 13:42:25,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:42:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 13:42:25,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:42:25,967 INFO L322 Elim1Store]: treesize reduction 24, result has 90.6 percent of original size [2023-08-24 13:42:25,967 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 107 treesize of output 267 [2023-08-24 13:42:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 13:42:31,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230633378] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:42:31,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:42:31,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 9] total 32 [2023-08-24 13:42:31,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939968060] [2023-08-24 13:42:31,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:42:31,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 13:42:31,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:42:31,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 13:42:31,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2023-08-24 13:42:31,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 673 [2023-08-24 13:42:31,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 847 transitions, 12270 flow. Second operand has 32 states, 32 states have (on average 202.34375) internal successors, (6475), 32 states have internal predecessors, (6475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:31,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:42:31,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 673 [2023-08-24 13:42:31,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:43:08,114 INFO L124 PetriNetUnfolderBase]: 95577/139542 cut-off events. [2023-08-24 13:43:08,115 INFO L125 PetriNetUnfolderBase]: For 2592633/2592633 co-relation queries the response was YES. [2023-08-24 13:43:11,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 984868 conditions, 139542 events. 95577/139542 cut-off events. For 2592633/2592633 co-relation queries the response was YES. Maximal size of possible extension queue 5807. Compared 1089835 event pairs, 35851 based on Foata normal form. 56/139598 useless extension candidates. Maximal degree in co-relation 984767. Up to 113872 conditions per place. [2023-08-24 13:43:11,771 INFO L140 encePairwiseOnDemand]: 656/673 looper letters, 974 selfloop transitions, 191 changer transitions 0/1165 dead transitions. [2023-08-24 13:43:11,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 1165 transitions, 19237 flow [2023-08-24 13:43:11,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 13:43:11,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 13:43:11,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2926 transitions. [2023-08-24 13:43:11,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31054977711738485 [2023-08-24 13:43:11,774 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2926 transitions. [2023-08-24 13:43:11,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2926 transitions. [2023-08-24 13:43:11,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:43:11,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2926 transitions. [2023-08-24 13:43:11,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 209.0) internal successors, (2926), 14 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:11,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 673.0) internal successors, (10095), 15 states have internal predecessors, (10095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:11,783 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 673.0) internal successors, (10095), 15 states have internal predecessors, (10095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:11,783 INFO L175 Difference]: Start difference. First operand has 260 places, 847 transitions, 12270 flow. Second operand 14 states and 2926 transitions. [2023-08-24 13:43:11,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 1165 transitions, 19237 flow [2023-08-24 13:44:46,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 1165 transitions, 18383 flow, removed 415 selfloop flow, removed 7 redundant places. [2023-08-24 13:44:46,175 INFO L231 Difference]: Finished difference. Result has 271 places, 901 transitions, 12926 flow [2023-08-24 13:44:46,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=673, PETRI_DIFFERENCE_MINUEND_FLOW=11426, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=847, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=686, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=12926, PETRI_PLACES=271, PETRI_TRANSITIONS=901} [2023-08-24 13:44:46,176 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 233 predicate places. [2023-08-24 13:44:46,176 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 901 transitions, 12926 flow [2023-08-24 13:44:46,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 202.34375) internal successors, (6475), 32 states have internal predecessors, (6475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:46,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:44:46,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:44:46,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-24 13:44:46,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:44:46,378 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:44:46,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:44:46,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1299793476, now seen corresponding path program 5 times [2023-08-24 13:44:46,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:44:46,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216910489] [2023-08-24 13:44:46,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:44:46,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:44:46,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:44:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 13:44:46,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:44:46,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216910489] [2023-08-24 13:44:46,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216910489] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:44:46,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572843220] [2023-08-24 13:44:46,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 13:44:46,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:44:46,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:44:46,985 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:44:47,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-24 13:44:47,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 13:44:47,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:44:47,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-24 13:44:47,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:44:47,282 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 13:44:47,328 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 13:44:47,355 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 13:44:47,382 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 13:44:47,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 13:44:47,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:44:47,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 13:44:47,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572843220] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:44:47,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:44:47,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 9] total 29 [2023-08-24 13:44:47,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620556188] [2023-08-24 13:44:47,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:44:47,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 13:44:47,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:44:47,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 13:44:47,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2023-08-24 13:44:47,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 673 [2023-08-24 13:44:47,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 901 transitions, 12926 flow. Second operand has 29 states, 29 states have (on average 191.3448275862069) internal successors, (5549), 29 states have internal predecessors, (5549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:47,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:44:47,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 673 [2023-08-24 13:44:47,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand