/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 INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 08:57:50,337 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 08:57:50,401 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 08:57:50,405 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 08:57:50,406 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 08:57:50,429 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 08:57:50,429 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 08:57:50,430 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 08:57:50,430 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 08:57:50,433 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 08:57:50,433 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 08:57:50,433 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 08:57:50,433 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 08:57:50,434 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 08:57:50,434 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 08:57:50,434 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 08:57:50,435 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 08:57:50,435 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 08:57:50,435 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 08:57:50,435 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 08:57:50,435 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 08:57:50,436 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 08:57:50,436 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 08:57:50,436 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 08:57:50,436 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 08:57:50,436 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 08:57:50,436 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 08:57:50,437 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 08:57:50,437 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 08:57:50,437 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 08:57:50,438 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 08:57:50,438 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 08:57:50,438 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 08:57:50,438 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 08:57:50,438 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 08:57:50,438 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 08:57:50,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 08:57:50,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 08:57:50,698 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 08:57:50,699 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 08:57:50,700 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 08:57:50,701 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2023-08-24 08:57:51,647 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 08:57:51,814 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 08:57:51,814 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2023-08-24 08:57:51,819 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed49b4be3/4840197090b04c55aebae4ea1438e8ef/FLAG66631571e [2023-08-24 08:57:51,828 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed49b4be3/4840197090b04c55aebae4ea1438e8ef [2023-08-24 08:57:51,830 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 08:57:51,830 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 08:57:51,831 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 08:57:51,831 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 08:57:51,833 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 08:57:51,833 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 08:57:51" (1/1) ... [2023-08-24 08:57:51,834 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18184d7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:57:51, skipping insertion in model container [2023-08-24 08:57:51,834 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 08:57:51" (1/1) ... [2023-08-24 08:57:51,848 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 08:57:51,943 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/popl20-figure3.wvr.c[2121,2134] [2023-08-24 08:57:51,944 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 08:57:51,950 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 08:57:51,969 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/popl20-figure3.wvr.c[2121,2134] [2023-08-24 08:57:51,974 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 08:57:51,980 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 08:57:51,981 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 08:57:51,985 INFO L206 MainTranslator]: Completed translation [2023-08-24 08:57:51,985 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:57:51 WrapperNode [2023-08-24 08:57:51,986 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 08:57:51,986 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 08:57:51,986 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 08:57:51,986 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 08:57:51,990 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:57:51" (1/1) ... [2023-08-24 08:57:51,996 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:57:51" (1/1) ... [2023-08-24 08:57:52,014 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2023-08-24 08:57:52,015 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 08:57:52,016 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 08:57:52,016 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 08:57:52,016 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 08:57:52,021 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:57:51" (1/1) ... [2023-08-24 08:57:52,021 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:57:51" (1/1) ... [2023-08-24 08:57:52,029 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:57:51" (1/1) ... [2023-08-24 08:57:52,030 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:57:51" (1/1) ... [2023-08-24 08:57:52,038 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:57:51" (1/1) ... [2023-08-24 08:57:52,041 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:57:51" (1/1) ... [2023-08-24 08:57:52,045 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:57:51" (1/1) ... [2023-08-24 08:57:52,046 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:57:51" (1/1) ... [2023-08-24 08:57:52,047 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 08:57:52,048 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 08:57:52,048 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 08:57:52,048 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 08:57:52,048 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:57:51" (1/1) ... [2023-08-24 08:57:52,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 08:57:52,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:57:52,077 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 08:57:52,095 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 08:57:52,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 08:57:52,106 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 08:57:52,107 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 08:57:52,107 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 08:57:52,107 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 08:57:52,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 08:57:52,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 08:57:52,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 08:57:52,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 08:57:52,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 08:57:52,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 08:57:52,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 08:57:52,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 08:57:52,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 08:57:52,108 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 08:57:52,188 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 08:57:52,189 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 08:57:52,296 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 08:57:52,314 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 08:57:52,314 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-24 08:57:52,316 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 08:57:52 BoogieIcfgContainer [2023-08-24 08:57:52,316 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 08:57:52,317 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 08:57:52,317 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 08:57:52,319 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 08:57:52,320 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 08:57:51" (1/3) ... [2023-08-24 08:57:52,320 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@768e0c11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 08:57:52, skipping insertion in model container [2023-08-24 08:57:52,320 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:57:51" (2/3) ... [2023-08-24 08:57:52,320 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@768e0c11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 08:57:52, skipping insertion in model container [2023-08-24 08:57:52,320 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 08:57:52" (3/3) ... [2023-08-24 08:57:52,321 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2023-08-24 08:57:52,332 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 08:57:52,332 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 08:57:52,332 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 08:57:52,374 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 08:57:52,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2023-08-24 08:57:52,425 INFO L124 PetriNetUnfolderBase]: 6/82 cut-off events. [2023-08-24 08:57:52,425 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 08:57:52,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2023-08-24 08:57:52,430 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2023-08-24 08:57:52,432 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 74 transitions, 160 flow [2023-08-24 08:57:52,435 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 08:57:52,440 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 74 transitions, 160 flow [2023-08-24 08:57:52,442 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 74 transitions, 160 flow [2023-08-24 08:57:52,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 74 transitions, 160 flow [2023-08-24 08:57:52,458 INFO L124 PetriNetUnfolderBase]: 6/74 cut-off events. [2023-08-24 08:57:52,458 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 08:57:52,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 74 events. 6/74 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 55 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2023-08-24 08:57:52,460 INFO L119 LiptonReduction]: Number of co-enabled transitions 572 [2023-08-24 08:57:54,004 INFO L134 LiptonReduction]: Checked pairs total: 599 [2023-08-24 08:57:54,004 INFO L136 LiptonReduction]: Total number of compositions: 66 [2023-08-24 08:57:54,017 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 08:57:54,021 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;@1b8fc501, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 08:57:54,021 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 08:57:54,030 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 08:57:54,031 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-08-24 08:57:54,031 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 08:57:54,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:57:54,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:57:54,031 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:57:54,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:57:54,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1981127344, now seen corresponding path program 1 times [2023-08-24 08:57:54,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:57:54,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422742860] [2023-08-24 08:57:54,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:57:54,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:57:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:57:54,415 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 08:57:54,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:57:54,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422742860] [2023-08-24 08:57:54,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422742860] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:57:54,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:57:54,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 08:57:54,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253991944] [2023-08-24 08:57:54,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:57:54,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 08:57:54,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:57:54,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 08:57:54,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 08:57:54,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 150 [2023-08-24 08:57:54,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 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 08:57:54,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:57:54,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 150 [2023-08-24 08:57:54,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:57:54,509 INFO L124 PetriNetUnfolderBase]: 49/94 cut-off events. [2023-08-24 08:57:54,509 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-24 08:57:54,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 94 events. 49/94 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 270 event pairs, 13 based on Foata normal form. 1/69 useless extension candidates. Maximal degree in co-relation 143. Up to 65 conditions per place. [2023-08-24 08:57:54,512 INFO L140 encePairwiseOnDemand]: 146/150 looper letters, 16 selfloop transitions, 2 changer transitions 4/24 dead transitions. [2023-08-24 08:57:54,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 24 transitions, 113 flow [2023-08-24 08:57:54,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 08:57:54,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 08:57:54,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 237 transitions. [2023-08-24 08:57:54,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5266666666666666 [2023-08-24 08:57:54,525 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 237 transitions. [2023-08-24 08:57:54,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 237 transitions. [2023-08-24 08:57:54,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:57:54,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 237 transitions. [2023-08-24 08:57:54,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:57:54,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 0 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 08:57:54,536 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 0 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 08:57:54,537 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 237 transitions. [2023-08-24 08:57:54,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 24 transitions, 113 flow [2023-08-24 08:57:54,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 24 transitions, 99 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 08:57:54,541 INFO L231 Difference]: Finished difference. Result has 19 places, 16 transitions, 48 flow [2023-08-24 08:57:54,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=16} [2023-08-24 08:57:54,544 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-08-24 08:57:54,544 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 16 transitions, 48 flow [2023-08-24 08:57:54,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 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 08:57:54,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:57:54,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:57:54,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 08:57:54,545 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:57:54,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:57:54,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1205829367, now seen corresponding path program 1 times [2023-08-24 08:57:54,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:57:54,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285233093] [2023-08-24 08:57:54,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:57:54,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:57:54,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:57:54,646 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 08:57:54,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:57:54,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285233093] [2023-08-24 08:57:54,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285233093] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:57:54,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:57:54,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 08:57:54,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077433387] [2023-08-24 08:57:54,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:57:54,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:57:54,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:57:54,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:57:54,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 08:57:54,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 08:57:54,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 16 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 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 08:57:54,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:57:54,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 08:57:54,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:57:54,719 INFO L124 PetriNetUnfolderBase]: 73/145 cut-off events. [2023-08-24 08:57:54,719 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-24 08:57:54,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 145 events. 73/145 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 428 event pairs, 24 based on Foata normal form. 6/151 useless extension candidates. Maximal degree in co-relation 177. Up to 78 conditions per place. [2023-08-24 08:57:54,721 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 28 selfloop transitions, 3 changer transitions 3/34 dead transitions. [2023-08-24 08:57:54,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 34 transitions, 164 flow [2023-08-24 08:57:54,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:57:54,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:57:54,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 334 transitions. [2023-08-24 08:57:54,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44533333333333336 [2023-08-24 08:57:54,726 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 334 transitions. [2023-08-24 08:57:54,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 334 transitions. [2023-08-24 08:57:54,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:57:54,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 334 transitions. [2023-08-24 08:57:54,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 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 08:57:54,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 150.0) internal successors, (900), 6 states have internal predecessors, (900), 0 states have call successors, (0), 0 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 08:57:54,730 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 150.0) internal successors, (900), 6 states have internal predecessors, (900), 0 states have call successors, (0), 0 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 08:57:54,730 INFO L175 Difference]: Start difference. First operand has 19 places, 16 transitions, 48 flow. Second operand 5 states and 334 transitions. [2023-08-24 08:57:54,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 34 transitions, 164 flow [2023-08-24 08:57:54,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 34 transitions, 161 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 08:57:54,732 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 76 flow [2023-08-24 08:57:54,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=76, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2023-08-24 08:57:54,733 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-08-24 08:57:54,733 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 76 flow [2023-08-24 08:57:54,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 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 08:57:54,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:57:54,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:57:54,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 08:57:54,736 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:57:54,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:57:54,741 INFO L85 PathProgramCache]: Analyzing trace with hash 544624157, now seen corresponding path program 2 times [2023-08-24 08:57:54,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:57:54,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65574874] [2023-08-24 08:57:54,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:57:54,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:57:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:57:54,846 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 08:57:54,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:57:54,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65574874] [2023-08-24 08:57:54,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65574874] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:57:54,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271445819] [2023-08-24 08:57:54,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:57:54,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:57:54,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:57:54,852 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 08:57:54,864 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 08:57:54,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:57:54,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:57:54,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:57:54,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:57:54,988 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 08:57:54,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:57:55,035 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 08:57:55,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271445819] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 08:57:55,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 08:57:55,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-08-24 08:57:55,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840049009] [2023-08-24 08:57:55,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:57:55,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 08:57:55,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:57:55,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 08:57:55,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-24 08:57:55,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 150 [2023-08-24 08:57:55,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 0 states have call successors, (0), 0 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 08:57:55,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:57:55,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 150 [2023-08-24 08:57:55,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:57:55,106 INFO L124 PetriNetUnfolderBase]: 72/143 cut-off events. [2023-08-24 08:57:55,106 INFO L125 PetriNetUnfolderBase]: For 150/155 co-relation queries the response was YES. [2023-08-24 08:57:55,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 459 conditions, 143 events. 72/143 cut-off events. For 150/155 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 435 event pairs, 28 based on Foata normal form. 6/147 useless extension candidates. Maximal degree in co-relation 118. Up to 86 conditions per place. [2023-08-24 08:57:55,108 INFO L140 encePairwiseOnDemand]: 146/150 looper letters, 24 selfloop transitions, 3 changer transitions 5/33 dead transitions. [2023-08-24 08:57:55,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 33 transitions, 194 flow [2023-08-24 08:57:55,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 08:57:55,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 08:57:55,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 287 transitions. [2023-08-24 08:57:55,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47833333333333333 [2023-08-24 08:57:55,109 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 287 transitions. [2023-08-24 08:57:55,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 287 transitions. [2023-08-24 08:57:55,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:57:55,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 287 transitions. [2023-08-24 08:57:55,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 0 states have call successors, (0), 0 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 08:57:55,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 0 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 08:57:55,111 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 0 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 08:57:55,111 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 76 flow. Second operand 4 states and 287 transitions. [2023-08-24 08:57:55,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 33 transitions, 194 flow [2023-08-24 08:57:55,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 33 transitions, 178 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-24 08:57:55,112 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 93 flow [2023-08-24 08:57:55,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2023-08-24 08:57:55,113 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2023-08-24 08:57:55,113 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 93 flow [2023-08-24 08:57:55,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 0 states have call successors, (0), 0 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 08:57:55,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:57:55,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:57:55,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 08:57:55,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:57:55,318 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:57:55,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:57:55,318 INFO L85 PathProgramCache]: Analyzing trace with hash 878920275, now seen corresponding path program 3 times [2023-08-24 08:57:55,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:57:55,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059804081] [2023-08-24 08:57:55,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:57:55,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:57:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:57:55,395 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 08:57:55,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:57:55,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059804081] [2023-08-24 08:57:55,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059804081] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:57:55,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58652861] [2023-08-24 08:57:55,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:57:55,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:57:55,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:57:55,397 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 08:57:55,404 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 08:57:55,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 08:57:55,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:57:55,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:57:55,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:57:55,468 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 08:57:55,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:57:55,493 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 08:57:55,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58652861] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:57:55,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:57:55,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-24 08:57:55,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385841009] [2023-08-24 08:57:55,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:57:55,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 08:57:55,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:57:55,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 08:57:55,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-24 08:57:55,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 08:57:55,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 93 flow. Second operand has 8 states, 8 states have (on average 62.5) internal successors, (500), 8 states have internal predecessors, (500), 0 states have call successors, (0), 0 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 08:57:55,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:57:55,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 08:57:55,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:57:55,548 INFO L124 PetriNetUnfolderBase]: 85/161 cut-off events. [2023-08-24 08:57:55,548 INFO L125 PetriNetUnfolderBase]: For 224/224 co-relation queries the response was YES. [2023-08-24 08:57:55,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 526 conditions, 161 events. 85/161 cut-off events. For 224/224 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 479 event pairs, 31 based on Foata normal form. 6/167 useless extension candidates. Maximal degree in co-relation 211. Up to 108 conditions per place. [2023-08-24 08:57:55,549 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 25 selfloop transitions, 9 changer transitions 3/37 dead transitions. [2023-08-24 08:57:55,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 37 transitions, 239 flow [2023-08-24 08:57:55,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:57:55,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:57:55,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 334 transitions. [2023-08-24 08:57:55,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44533333333333336 [2023-08-24 08:57:55,550 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 334 transitions. [2023-08-24 08:57:55,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 334 transitions. [2023-08-24 08:57:55,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:57:55,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 334 transitions. [2023-08-24 08:57:55,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 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 08:57:55,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 150.0) internal successors, (900), 6 states have internal predecessors, (900), 0 states have call successors, (0), 0 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 08:57:55,552 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 150.0) internal successors, (900), 6 states have internal predecessors, (900), 0 states have call successors, (0), 0 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 08:57:55,553 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 93 flow. Second operand 5 states and 334 transitions. [2023-08-24 08:57:55,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 37 transitions, 239 flow [2023-08-24 08:57:55,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 37 transitions, 230 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-24 08:57:55,554 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 148 flow [2023-08-24 08:57:55,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-08-24 08:57:55,555 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 12 predicate places. [2023-08-24 08:57:55,555 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 148 flow [2023-08-24 08:57:55,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 62.5) internal successors, (500), 8 states have internal predecessors, (500), 0 states have call successors, (0), 0 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 08:57:55,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:57:55,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:57:55,562 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 08:57:55,761 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,SelfDestructingSolverStorable3 [2023-08-24 08:57:55,761 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:57:55,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:57:55,761 INFO L85 PathProgramCache]: Analyzing trace with hash 862986324, now seen corresponding path program 1 times [2023-08-24 08:57:55,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:57:55,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971059188] [2023-08-24 08:57:55,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:57:55,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:57:55,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:57:55,885 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 08:57:55,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:57:55,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971059188] [2023-08-24 08:57:55,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971059188] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:57:55,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605420767] [2023-08-24 08:57:55,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:57:55,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:57:55,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:57:55,887 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 08:57:55,890 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 08:57:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:57:55,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-24 08:57:55,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:57:55,984 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 08:57:55,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:57:56,019 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 08:57:56,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605420767] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:57:56,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:57:56,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 4 [2023-08-24 08:57:56,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039317787] [2023-08-24 08:57:56,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:57:56,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 08:57:56,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:57:56,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 08:57:56,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-24 08:57:56,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 150 [2023-08-24 08:57:56,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 148 flow. Second operand has 6 states, 6 states have (on average 72.5) internal successors, (435), 6 states have internal predecessors, (435), 0 states have call successors, (0), 0 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 08:57:56,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:57:56,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 150 [2023-08-24 08:57:56,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:57:56,082 INFO L124 PetriNetUnfolderBase]: 105/204 cut-off events. [2023-08-24 08:57:56,082 INFO L125 PetriNetUnfolderBase]: For 366/388 co-relation queries the response was YES. [2023-08-24 08:57:56,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 741 conditions, 204 events. 105/204 cut-off events. For 366/388 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 695 event pairs, 19 based on Foata normal form. 20/217 useless extension candidates. Maximal degree in co-relation 332. Up to 95 conditions per place. [2023-08-24 08:57:56,084 INFO L140 encePairwiseOnDemand]: 146/150 looper letters, 29 selfloop transitions, 10 changer transitions 4/47 dead transitions. [2023-08-24 08:57:56,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 47 transitions, 328 flow [2023-08-24 08:57:56,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 08:57:56,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 08:57:56,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 307 transitions. [2023-08-24 08:57:56,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5116666666666667 [2023-08-24 08:57:56,085 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 307 transitions. [2023-08-24 08:57:56,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 307 transitions. [2023-08-24 08:57:56,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:57:56,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 307 transitions. [2023-08-24 08:57:56,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 76.75) internal successors, (307), 4 states have internal predecessors, (307), 0 states have call successors, (0), 0 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 08:57:56,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 0 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 08:57:56,087 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 0 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 08:57:56,087 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 148 flow. Second operand 4 states and 307 transitions. [2023-08-24 08:57:56,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 47 transitions, 328 flow [2023-08-24 08:57:56,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 47 transitions, 305 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-24 08:57:56,091 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 222 flow [2023-08-24 08:57:56,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=222, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2023-08-24 08:57:56,092 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 14 predicate places. [2023-08-24 08:57:56,092 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 222 flow [2023-08-24 08:57:56,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.5) internal successors, (435), 6 states have internal predecessors, (435), 0 states have call successors, (0), 0 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 08:57:56,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:57:56,093 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:57:56,099 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 08:57:56,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:57:56,301 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:57:56,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:57:56,302 INFO L85 PathProgramCache]: Analyzing trace with hash 878170537, now seen corresponding path program 2 times [2023-08-24 08:57:56,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:57:56,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111370624] [2023-08-24 08:57:56,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:57:56,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:57:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:57:56,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:57:56,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:57:56,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111370624] [2023-08-24 08:57:56,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111370624] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:57:56,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536003279] [2023-08-24 08:57:56,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:57:56,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:57:56,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:57:56,393 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 08:57:56,395 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 08:57:56,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:57:56,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:57:56,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 08:57:56,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:57:56,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:57:56,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:57:56,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:57:56,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536003279] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:57:56,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:57:56,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2023-08-24 08:57:56,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668017943] [2023-08-24 08:57:56,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:57:56,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 08:57:56,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:57:56,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 08:57:56,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-24 08:57:56,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 08:57:56,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 222 flow. Second operand has 12 states, 12 states have (on average 63.0) internal successors, (756), 12 states have internal predecessors, (756), 0 states have call successors, (0), 0 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 08:57:56,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:57:56,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 08:57:56,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:57:56,815 INFO L124 PetriNetUnfolderBase]: 211/376 cut-off events. [2023-08-24 08:57:56,815 INFO L125 PetriNetUnfolderBase]: For 772/772 co-relation queries the response was YES. [2023-08-24 08:57:56,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1507 conditions, 376 events. 211/376 cut-off events. For 772/772 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1415 event pairs, 14 based on Foata normal form. 8/384 useless extension candidates. Maximal degree in co-relation 780. Up to 137 conditions per place. [2023-08-24 08:57:56,818 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 60 selfloop transitions, 30 changer transitions 10/100 dead transitions. [2023-08-24 08:57:56,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 100 transitions, 831 flow [2023-08-24 08:57:56,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 08:57:56,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 08:57:56,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 859 transitions. [2023-08-24 08:57:56,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44051282051282054 [2023-08-24 08:57:56,821 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 859 transitions. [2023-08-24 08:57:56,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 859 transitions. [2023-08-24 08:57:56,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:57:56,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 859 transitions. [2023-08-24 08:57:56,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 66.07692307692308) internal successors, (859), 13 states have internal predecessors, (859), 0 states have call successors, (0), 0 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 08:57:56,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 150.0) internal successors, (2100), 14 states have internal predecessors, (2100), 0 states have call successors, (0), 0 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 08:57:56,826 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 150.0) internal successors, (2100), 14 states have internal predecessors, (2100), 0 states have call successors, (0), 0 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 08:57:56,826 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 222 flow. Second operand 13 states and 859 transitions. [2023-08-24 08:57:56,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 100 transitions, 831 flow [2023-08-24 08:57:56,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 100 transitions, 809 flow, removed 11 selfloop flow, removed 0 redundant places. [2023-08-24 08:57:56,830 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 518 flow [2023-08-24 08:57:56,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=518, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2023-08-24 08:57:56,832 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 33 predicate places. [2023-08-24 08:57:56,832 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 518 flow [2023-08-24 08:57:56,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 63.0) internal successors, (756), 12 states have internal predecessors, (756), 0 states have call successors, (0), 0 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 08:57:56,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:57:56,832 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:57:56,843 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 08:57:57,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:57:57,038 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:57:57,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:57:57,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1064968923, now seen corresponding path program 3 times [2023-08-24 08:57:57,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:57:57,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415477340] [2023-08-24 08:57:57,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:57:57,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:57:57,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:57:57,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:57:57,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:57:57,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415477340] [2023-08-24 08:57:57,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415477340] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:57:57,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120964153] [2023-08-24 08:57:57,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:57:57,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:57:57,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:57:57,161 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 08:57:57,163 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 08:57:57,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 08:57:57,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:57:57,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 08:57:57,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:57:57,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:57:57,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:57:57,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:57:57,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120964153] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:57:57,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:57:57,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-08-24 08:57:57,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187163281] [2023-08-24 08:57:57,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:57:57,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 08:57:57,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:57:57,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 08:57:57,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-08-24 08:57:57,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 08:57:57,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 518 flow. Second operand has 14 states, 14 states have (on average 62.0) internal successors, (868), 14 states have internal predecessors, (868), 0 states have call successors, (0), 0 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 08:57:57,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:57:57,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 08:57:57,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:57:57,670 INFO L124 PetriNetUnfolderBase]: 235/403 cut-off events. [2023-08-24 08:57:57,670 INFO L125 PetriNetUnfolderBase]: For 2182/2182 co-relation queries the response was YES. [2023-08-24 08:57:57,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2177 conditions, 403 events. 235/403 cut-off events. For 2182/2182 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1448 event pairs, 17 based on Foata normal form. 22/425 useless extension candidates. Maximal degree in co-relation 1757. Up to 153 conditions per place. [2023-08-24 08:57:57,673 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 69 selfloop transitions, 59 changer transitions 1/129 dead transitions. [2023-08-24 08:57:57,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 129 transitions, 1333 flow [2023-08-24 08:57:57,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 08:57:57,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 08:57:57,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1304 transitions. [2023-08-24 08:57:57,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43466666666666665 [2023-08-24 08:57:57,676 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1304 transitions. [2023-08-24 08:57:57,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1304 transitions. [2023-08-24 08:57:57,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:57:57,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1304 transitions. [2023-08-24 08:57:57,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 65.2) internal successors, (1304), 20 states have internal predecessors, (1304), 0 states have call successors, (0), 0 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 08:57:57,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 150.0) internal successors, (3150), 21 states have internal predecessors, (3150), 0 states have call successors, (0), 0 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 08:57:57,683 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 150.0) internal successors, (3150), 21 states have internal predecessors, (3150), 0 states have call successors, (0), 0 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 08:57:57,683 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 518 flow. Second operand 20 states and 1304 transitions. [2023-08-24 08:57:57,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 129 transitions, 1333 flow [2023-08-24 08:57:57,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 129 transitions, 1163 flow, removed 81 selfloop flow, removed 3 redundant places. [2023-08-24 08:57:57,690 INFO L231 Difference]: Finished difference. Result has 77 places, 84 transitions, 913 flow [2023-08-24 08:57:57,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=913, PETRI_PLACES=77, PETRI_TRANSITIONS=84} [2023-08-24 08:57:57,691 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 57 predicate places. [2023-08-24 08:57:57,692 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 84 transitions, 913 flow [2023-08-24 08:57:57,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 62.0) internal successors, (868), 14 states have internal predecessors, (868), 0 states have call successors, (0), 0 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 08:57:57,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:57:57,694 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:57:57,712 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 08:57:57,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:57:57,900 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:57:57,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:57:57,900 INFO L85 PathProgramCache]: Analyzing trace with hash -125023869, now seen corresponding path program 4 times [2023-08-24 08:57:57,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:57:57,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791527608] [2023-08-24 08:57:57,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:57:57,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:57:57,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:57:57,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:57:57,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:57:57,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791527608] [2023-08-24 08:57:57,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791527608] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:57:57,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762701726] [2023-08-24 08:57:57,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:57:57,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:57:57,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:57:57,985 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 08:57:57,987 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 08:57:58,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:57:58,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:57:58,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 08:57:58,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:57:58,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:57:58,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:57:58,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:57:58,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762701726] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:57:58,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:57:58,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-08-24 08:57:58,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072101183] [2023-08-24 08:57:58,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:57:58,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 08:57:58,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:57:58,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 08:57:58,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-08-24 08:57:58,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 08:57:58,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 84 transitions, 913 flow. Second operand has 14 states, 14 states have (on average 61.92857142857143) internal successors, (867), 14 states have internal predecessors, (867), 0 states have call successors, (0), 0 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 08:57:58,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:57:58,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 08:57:58,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:57:58,448 INFO L124 PetriNetUnfolderBase]: 314/526 cut-off events. [2023-08-24 08:57:58,449 INFO L125 PetriNetUnfolderBase]: For 5337/5337 co-relation queries the response was YES. [2023-08-24 08:57:58,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3221 conditions, 526 events. 314/526 cut-off events. For 5337/5337 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1999 event pairs, 26 based on Foata normal form. 14/540 useless extension candidates. Maximal degree in co-relation 2784. Up to 205 conditions per place. [2023-08-24 08:57:58,452 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 62 selfloop transitions, 91 changer transitions 3/156 dead transitions. [2023-08-24 08:57:58,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 156 transitions, 1861 flow [2023-08-24 08:57:58,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 08:57:58,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 08:57:58,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1230 transitions. [2023-08-24 08:57:58,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43157894736842106 [2023-08-24 08:57:58,455 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1230 transitions. [2023-08-24 08:57:58,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1230 transitions. [2023-08-24 08:57:58,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:57:58,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1230 transitions. [2023-08-24 08:57:58,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 64.73684210526316) internal successors, (1230), 19 states have internal predecessors, (1230), 0 states have call successors, (0), 0 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 08:57:58,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 150.0) internal successors, (3000), 20 states have internal predecessors, (3000), 0 states have call successors, (0), 0 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 08:57:58,460 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 150.0) internal successors, (3000), 20 states have internal predecessors, (3000), 0 states have call successors, (0), 0 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 08:57:58,460 INFO L175 Difference]: Start difference. First operand has 77 places, 84 transitions, 913 flow. Second operand 19 states and 1230 transitions. [2023-08-24 08:57:58,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 156 transitions, 1861 flow [2023-08-24 08:57:58,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 156 transitions, 1635 flow, removed 96 selfloop flow, removed 5 redundant places. [2023-08-24 08:57:58,474 INFO L231 Difference]: Finished difference. Result has 100 places, 118 transitions, 1423 flow [2023-08-24 08:57:58,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=705, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1423, PETRI_PLACES=100, PETRI_TRANSITIONS=118} [2023-08-24 08:57:58,474 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 80 predicate places. [2023-08-24 08:57:58,474 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 118 transitions, 1423 flow [2023-08-24 08:57:58,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 61.92857142857143) internal successors, (867), 14 states have internal predecessors, (867), 0 states have call successors, (0), 0 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 08:57:58,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:57:58,475 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:57:58,483 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 08:57:58,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:57:58,683 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:57:58,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:57:58,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1470221909, now seen corresponding path program 5 times [2023-08-24 08:57:58,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:57:58,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719405386] [2023-08-24 08:57:58,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:57:58,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:57:58,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:57:58,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:57:58,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:57:58,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719405386] [2023-08-24 08:57:58,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719405386] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:57:58,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525233386] [2023-08-24 08:57:58,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:57:58,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:57:58,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:57:58,772 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 08:57:58,774 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 08:57:58,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:57:58,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:57:58,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 08:57:58,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:57:58,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:57:58,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:57:58,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:57:58,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525233386] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:57:58,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:57:58,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-08-24 08:57:58,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39000131] [2023-08-24 08:57:58,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:57:58,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 08:57:58,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:57:58,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 08:57:58,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-08-24 08:57:58,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 08:57:58,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 118 transitions, 1423 flow. Second operand has 15 states, 15 states have (on average 62.4) internal successors, (936), 15 states have internal predecessors, (936), 0 states have call successors, (0), 0 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 08:57:58,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:57:58,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 08:57:58,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:57:59,373 INFO L124 PetriNetUnfolderBase]: 334/574 cut-off events. [2023-08-24 08:57:59,373 INFO L125 PetriNetUnfolderBase]: For 10200/10200 co-relation queries the response was YES. [2023-08-24 08:57:59,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3773 conditions, 574 events. 334/574 cut-off events. For 10200/10200 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2307 event pairs, 16 based on Foata normal form. 24/598 useless extension candidates. Maximal degree in co-relation 3474. Up to 209 conditions per place. [2023-08-24 08:57:59,377 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 71 selfloop transitions, 99 changer transitions 4/174 dead transitions. [2023-08-24 08:57:59,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 174 transitions, 2137 flow [2023-08-24 08:57:59,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 08:57:59,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 08:57:59,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1491 transitions. [2023-08-24 08:57:59,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43217391304347824 [2023-08-24 08:57:59,380 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1491 transitions. [2023-08-24 08:57:59,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1491 transitions. [2023-08-24 08:57:59,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:57:59,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1491 transitions. [2023-08-24 08:57:59,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 64.82608695652173) internal successors, (1491), 23 states have internal predecessors, (1491), 0 states have call successors, (0), 0 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 08:57:59,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 150.0) internal successors, (3600), 24 states have internal predecessors, (3600), 0 states have call successors, (0), 0 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 08:57:59,386 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 150.0) internal successors, (3600), 24 states have internal predecessors, (3600), 0 states have call successors, (0), 0 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 08:57:59,386 INFO L175 Difference]: Start difference. First operand has 100 places, 118 transitions, 1423 flow. Second operand 23 states and 1491 transitions. [2023-08-24 08:57:59,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 174 transitions, 2137 flow [2023-08-24 08:57:59,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 174 transitions, 1996 flow, removed 68 selfloop flow, removed 1 redundant places. [2023-08-24 08:57:59,430 INFO L231 Difference]: Finished difference. Result has 122 places, 123 transitions, 1533 flow [2023-08-24 08:57:59,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1533, PETRI_PLACES=122, PETRI_TRANSITIONS=123} [2023-08-24 08:57:59,431 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 102 predicate places. [2023-08-24 08:57:59,431 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 123 transitions, 1533 flow [2023-08-24 08:57:59,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 62.4) internal successors, (936), 15 states have internal predecessors, (936), 0 states have call successors, (0), 0 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 08:57:59,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:57:59,432 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:57:59,439 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 08:57:59,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:57:59,637 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:57:59,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:57:59,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1905461149, now seen corresponding path program 6 times [2023-08-24 08:57:59,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:57:59,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865781549] [2023-08-24 08:57:59,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:57:59,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:57:59,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:57:59,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:57:59,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:57:59,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865781549] [2023-08-24 08:57:59,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865781549] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:57:59,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91306310] [2023-08-24 08:57:59,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:57:59,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:57:59,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:57:59,709 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 08:57:59,711 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 08:57:59,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 08:57:59,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:57:59,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 08:57:59,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:57:59,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:57:59,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:57:59,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:57:59,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91306310] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:57:59,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:57:59,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-08-24 08:57:59,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614559328] [2023-08-24 08:57:59,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:57:59,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 08:57:59,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:57:59,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 08:57:59,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-08-24 08:57:59,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 08:57:59,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 123 transitions, 1533 flow. Second operand has 15 states, 15 states have (on average 61.86666666666667) internal successors, (928), 15 states have internal predecessors, (928), 0 states have call successors, (0), 0 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 08:57:59,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:57:59,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 08:57:59,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:58:00,321 INFO L124 PetriNetUnfolderBase]: 506/864 cut-off events. [2023-08-24 08:58:00,321 INFO L125 PetriNetUnfolderBase]: For 16495/16495 co-relation queries the response was YES. [2023-08-24 08:58:00,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6144 conditions, 864 events. 506/864 cut-off events. For 16495/16495 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3862 event pairs, 72 based on Foata normal form. 36/900 useless extension candidates. Maximal degree in co-relation 5758. Up to 501 conditions per place. [2023-08-24 08:58:00,328 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 146 selfloop transitions, 114 changer transitions 3/263 dead transitions. [2023-08-24 08:58:00,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 263 transitions, 3688 flow [2023-08-24 08:58:00,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 08:58:00,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 08:58:00,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1562 transitions. [2023-08-24 08:58:00,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4338888888888889 [2023-08-24 08:58:00,331 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1562 transitions. [2023-08-24 08:58:00,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1562 transitions. [2023-08-24 08:58:00,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:58:00,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1562 transitions. [2023-08-24 08:58:00,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 65.08333333333333) internal successors, (1562), 24 states have internal predecessors, (1562), 0 states have call successors, (0), 0 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 08:58:00,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 150.0) internal successors, (3750), 25 states have internal predecessors, (3750), 0 states have call successors, (0), 0 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 08:58:00,337 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 150.0) internal successors, (3750), 25 states have internal predecessors, (3750), 0 states have call successors, (0), 0 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 08:58:00,337 INFO L175 Difference]: Start difference. First operand has 122 places, 123 transitions, 1533 flow. Second operand 24 states and 1562 transitions. [2023-08-24 08:58:00,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 263 transitions, 3688 flow [2023-08-24 08:58:00,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 263 transitions, 3160 flow, removed 89 selfloop flow, removed 22 redundant places. [2023-08-24 08:58:00,363 INFO L231 Difference]: Finished difference. Result has 134 places, 192 transitions, 2621 flow [2023-08-24 08:58:00,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=1259, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2621, PETRI_PLACES=134, PETRI_TRANSITIONS=192} [2023-08-24 08:58:00,364 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 114 predicate places. [2023-08-24 08:58:00,364 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 192 transitions, 2621 flow [2023-08-24 08:58:00,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 61.86666666666667) internal successors, (928), 15 states have internal predecessors, (928), 0 states have call successors, (0), 0 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 08:58:00,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:58:00,365 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:58:00,372 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 08:58:00,573 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,SelfDestructingSolverStorable9 [2023-08-24 08:58:00,573 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:58:00,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:58:00,574 INFO L85 PathProgramCache]: Analyzing trace with hash -135102297, now seen corresponding path program 7 times [2023-08-24 08:58:00,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:58:00,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908434275] [2023-08-24 08:58:00,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:58:00,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:58:00,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:58:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:00,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:58:00,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908434275] [2023-08-24 08:58:00,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908434275] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:58:00,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719961039] [2023-08-24 08:58:00,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:58:00,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:58:00,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:58:00,666 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 08:58:00,667 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 08:58:00,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:58:00,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 08:58:00,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:58:00,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:00,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:58:00,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:00,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719961039] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:58:00,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:58:00,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-08-24 08:58:00,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565858115] [2023-08-24 08:58:00,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:58:00,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 08:58:00,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:58:00,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 08:58:00,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-08-24 08:58:00,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 08:58:00,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 192 transitions, 2621 flow. Second operand has 14 states, 14 states have (on average 61.857142857142854) internal successors, (866), 14 states have internal predecessors, (866), 0 states have call successors, (0), 0 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 08:58:00,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:58:00,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 08:58:00,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:58:01,165 INFO L124 PetriNetUnfolderBase]: 546/928 cut-off events. [2023-08-24 08:58:01,165 INFO L125 PetriNetUnfolderBase]: For 12012/12012 co-relation queries the response was YES. [2023-08-24 08:58:01,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6687 conditions, 928 events. 546/928 cut-off events. For 12012/12012 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4196 event pairs, 79 based on Foata normal form. 12/940 useless extension candidates. Maximal degree in co-relation 6432. Up to 580 conditions per place. [2023-08-24 08:58:01,172 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 100 selfloop transitions, 127 changer transitions 5/232 dead transitions. [2023-08-24 08:58:01,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 232 transitions, 3575 flow [2023-08-24 08:58:01,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 08:58:01,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 08:58:01,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 903 transitions. [2023-08-24 08:58:01,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2023-08-24 08:58:01,174 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 903 transitions. [2023-08-24 08:58:01,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 903 transitions. [2023-08-24 08:58:01,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:58:01,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 903 transitions. [2023-08-24 08:58:01,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 64.5) internal successors, (903), 14 states have internal predecessors, (903), 0 states have call successors, (0), 0 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 08:58:01,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 150.0) internal successors, (2250), 15 states have internal predecessors, (2250), 0 states have call successors, (0), 0 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 08:58:01,177 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 150.0) internal successors, (2250), 15 states have internal predecessors, (2250), 0 states have call successors, (0), 0 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 08:58:01,177 INFO L175 Difference]: Start difference. First operand has 134 places, 192 transitions, 2621 flow. Second operand 14 states and 903 transitions. [2023-08-24 08:58:01,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 232 transitions, 3575 flow [2023-08-24 08:58:01,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 232 transitions, 3036 flow, removed 233 selfloop flow, removed 7 redundant places. [2023-08-24 08:58:01,214 INFO L231 Difference]: Finished difference. Result has 143 places, 211 transitions, 2846 flow [2023-08-24 08:58:01,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=2097, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2846, PETRI_PLACES=143, PETRI_TRANSITIONS=211} [2023-08-24 08:58:01,215 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 123 predicate places. [2023-08-24 08:58:01,215 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 211 transitions, 2846 flow [2023-08-24 08:58:01,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 61.857142857142854) internal successors, (866), 14 states have internal predecessors, (866), 0 states have call successors, (0), 0 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 08:58:01,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:58:01,215 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:58:01,222 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 08:58:01,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:58:01,419 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:58:01,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:58:01,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1330436331, now seen corresponding path program 8 times [2023-08-24 08:58:01,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:58:01,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188091395] [2023-08-24 08:58:01,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:58:01,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:58:01,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:58:01,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:01,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:58:01,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188091395] [2023-08-24 08:58:01,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188091395] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:58:01,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194522394] [2023-08-24 08:58:01,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:58:01,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:58:01,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:58:01,501 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 08:58:01,503 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 08:58:01,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:58:01,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:58:01,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 08:58:01,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:58:01,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:01,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:58:01,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:01,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194522394] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:58:01,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:58:01,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-08-24 08:58:01,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21074856] [2023-08-24 08:58:01,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:58:01,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 08:58:01,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:58:01,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 08:58:01,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-24 08:58:01,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 08:58:01,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 211 transitions, 2846 flow. Second operand has 15 states, 15 states have (on average 61.8) internal successors, (927), 15 states have internal predecessors, (927), 0 states have call successors, (0), 0 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 08:58:01,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:58:01,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 08:58:01,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:58:02,006 INFO L124 PetriNetUnfolderBase]: 532/928 cut-off events. [2023-08-24 08:58:02,006 INFO L125 PetriNetUnfolderBase]: For 11694/11694 co-relation queries the response was YES. [2023-08-24 08:58:02,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6579 conditions, 928 events. 532/928 cut-off events. For 11694/11694 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4299 event pairs, 65 based on Foata normal form. 24/952 useless extension candidates. Maximal degree in co-relation 6391. Up to 484 conditions per place. [2023-08-24 08:58:02,013 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 95 selfloop transitions, 141 changer transitions 1/237 dead transitions. [2023-08-24 08:58:02,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 237 transitions, 3443 flow [2023-08-24 08:58:02,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 08:58:02,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 08:58:02,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1035 transitions. [2023-08-24 08:58:02,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2023-08-24 08:58:02,015 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1035 transitions. [2023-08-24 08:58:02,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1035 transitions. [2023-08-24 08:58:02,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:58:02,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1035 transitions. [2023-08-24 08:58:02,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 64.6875) internal successors, (1035), 16 states have internal predecessors, (1035), 0 states have call successors, (0), 0 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 08:58:02,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 150.0) internal successors, (2550), 17 states have internal predecessors, (2550), 0 states have call successors, (0), 0 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 08:58:02,019 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 150.0) internal successors, (2550), 17 states have internal predecessors, (2550), 0 states have call successors, (0), 0 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 08:58:02,019 INFO L175 Difference]: Start difference. First operand has 143 places, 211 transitions, 2846 flow. Second operand 16 states and 1035 transitions. [2023-08-24 08:58:02,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 237 transitions, 3443 flow [2023-08-24 08:58:02,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 237 transitions, 3222 flow, removed 67 selfloop flow, removed 7 redundant places. [2023-08-24 08:58:02,061 INFO L231 Difference]: Finished difference. Result has 152 places, 210 transitions, 2929 flow [2023-08-24 08:58:02,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=2543, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2929, PETRI_PLACES=152, PETRI_TRANSITIONS=210} [2023-08-24 08:58:02,062 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 132 predicate places. [2023-08-24 08:58:02,062 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 210 transitions, 2929 flow [2023-08-24 08:58:02,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 61.8) internal successors, (927), 15 states have internal predecessors, (927), 0 states have call successors, (0), 0 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 08:58:02,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:58:02,063 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:58:02,069 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 08:58:02,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-24 08:58:02,267 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:58:02,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:58:02,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1637230808, now seen corresponding path program 9 times [2023-08-24 08:58:02,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:58:02,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121099724] [2023-08-24 08:58:02,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:58:02,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:58:02,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:58:02,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:02,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:58:02,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121099724] [2023-08-24 08:58:02,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121099724] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:58:02,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239571230] [2023-08-24 08:58:02,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:58:02,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:58:02,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:58:02,381 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 08:58:02,383 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 08:58:02,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 08:58:02,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:58:02,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-24 08:58:02,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:58:02,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:58:02,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:58:02,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:58:02,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239571230] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:58:02,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:58:02,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2023-08-24 08:58:02,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256161476] [2023-08-24 08:58:02,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:58:02,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 08:58:02,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:58:02,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 08:58:02,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-24 08:58:02,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 150 [2023-08-24 08:58:02,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 210 transitions, 2929 flow. Second operand has 8 states, 8 states have (on average 71.875) internal successors, (575), 8 states have internal predecessors, (575), 0 states have call successors, (0), 0 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 08:58:02,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:58:02,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 150 [2023-08-24 08:58:02,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:58:02,733 INFO L124 PetriNetUnfolderBase]: 687/1218 cut-off events. [2023-08-24 08:58:02,734 INFO L125 PetriNetUnfolderBase]: For 15979/15989 co-relation queries the response was YES. [2023-08-24 08:58:02,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9109 conditions, 1218 events. 687/1218 cut-off events. For 15979/15989 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 6293 event pairs, 34 based on Foata normal form. 20/1236 useless extension candidates. Maximal degree in co-relation 8795. Up to 658 conditions per place. [2023-08-24 08:58:02,746 INFO L140 encePairwiseOnDemand]: 146/150 looper letters, 173 selfloop transitions, 87 changer transitions 40/308 dead transitions. [2023-08-24 08:58:02,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 308 transitions, 4839 flow [2023-08-24 08:58:02,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:58:02,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:58:02,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 386 transitions. [2023-08-24 08:58:02,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5146666666666667 [2023-08-24 08:58:02,747 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 386 transitions. [2023-08-24 08:58:02,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 386 transitions. [2023-08-24 08:58:02,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:58:02,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 386 transitions. [2023-08-24 08:58:02,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 77.2) internal successors, (386), 5 states have internal predecessors, (386), 0 states have call successors, (0), 0 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 08:58:02,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 150.0) internal successors, (900), 6 states have internal predecessors, (900), 0 states have call successors, (0), 0 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 08:58:02,749 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 150.0) internal successors, (900), 6 states have internal predecessors, (900), 0 states have call successors, (0), 0 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 08:58:02,749 INFO L175 Difference]: Start difference. First operand has 152 places, 210 transitions, 2929 flow. Second operand 5 states and 386 transitions. [2023-08-24 08:58:02,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 308 transitions, 4839 flow [2023-08-24 08:58:02,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 308 transitions, 4395 flow, removed 47 selfloop flow, removed 15 redundant places. [2023-08-24 08:58:02,804 INFO L231 Difference]: Finished difference. Result has 144 places, 231 transitions, 3317 flow [2023-08-24 08:58:02,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=2577, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3317, PETRI_PLACES=144, PETRI_TRANSITIONS=231} [2023-08-24 08:58:02,805 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 124 predicate places. [2023-08-24 08:58:02,805 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 231 transitions, 3317 flow [2023-08-24 08:58:02,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 71.875) internal successors, (575), 8 states have internal predecessors, (575), 0 states have call successors, (0), 0 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 08:58:02,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:58:02,806 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:58:02,815 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 08:58:03,010 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,SelfDestructingSolverStorable12 [2023-08-24 08:58:03,010 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:58:03,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:58:03,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1383797129, now seen corresponding path program 10 times [2023-08-24 08:58:03,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:58:03,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404968522] [2023-08-24 08:58:03,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:58:03,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:58:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:58:03,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:03,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:58:03,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404968522] [2023-08-24 08:58:03,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404968522] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:58:03,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899304591] [2023-08-24 08:58:03,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:58:03,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:58:03,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:58:03,112 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 08:58:03,132 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 08:58:03,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:58:03,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:58:03,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 08:58:03,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:58:03,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:03,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:58:03,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:03,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899304591] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:58:03,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:58:03,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-24 08:58:03,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636244267] [2023-08-24 08:58:03,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:58:03,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 08:58:03,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:58:03,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 08:58:03,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-08-24 08:58:03,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 08:58:03,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 231 transitions, 3317 flow. Second operand has 15 states, 15 states have (on average 61.93333333333333) internal successors, (929), 15 states have internal predecessors, (929), 0 states have call successors, (0), 0 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 08:58:03,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:58:03,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 08:58:03,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:58:03,963 INFO L124 PetriNetUnfolderBase]: 1188/1975 cut-off events. [2023-08-24 08:58:03,963 INFO L125 PetriNetUnfolderBase]: For 24106/24106 co-relation queries the response was YES. [2023-08-24 08:58:03,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15477 conditions, 1975 events. 1188/1975 cut-off events. For 24106/24106 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 10354 event pairs, 7 based on Foata normal form. 16/1991 useless extension candidates. Maximal degree in co-relation 15187. Up to 762 conditions per place. [2023-08-24 08:58:03,981 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 270 selfloop transitions, 217 changer transitions 5/492 dead transitions. [2023-08-24 08:58:03,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 492 transitions, 7901 flow [2023-08-24 08:58:03,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 08:58:03,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 08:58:03,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1371 transitions. [2023-08-24 08:58:03,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43523809523809526 [2023-08-24 08:58:03,983 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1371 transitions. [2023-08-24 08:58:03,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1371 transitions. [2023-08-24 08:58:03,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:58:03,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1371 transitions. [2023-08-24 08:58:03,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 65.28571428571429) internal successors, (1371), 21 states have internal predecessors, (1371), 0 states have call successors, (0), 0 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 08:58:03,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 150.0) internal successors, (3300), 22 states have internal predecessors, (3300), 0 states have call successors, (0), 0 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 08:58:03,988 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 150.0) internal successors, (3300), 22 states have internal predecessors, (3300), 0 states have call successors, (0), 0 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 08:58:03,988 INFO L175 Difference]: Start difference. First operand has 144 places, 231 transitions, 3317 flow. Second operand 21 states and 1371 transitions. [2023-08-24 08:58:03,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 492 transitions, 7901 flow [2023-08-24 08:58:04,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 492 transitions, 7778 flow, removed 59 selfloop flow, removed 1 redundant places. [2023-08-24 08:58:04,082 INFO L231 Difference]: Finished difference. Result has 174 places, 384 transitions, 6358 flow [2023-08-24 08:58:04,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=3246, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6358, PETRI_PLACES=174, PETRI_TRANSITIONS=384} [2023-08-24 08:58:04,082 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 154 predicate places. [2023-08-24 08:58:04,082 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 384 transitions, 6358 flow [2023-08-24 08:58:04,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 61.93333333333333) internal successors, (929), 15 states have internal predecessors, (929), 0 states have call successors, (0), 0 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 08:58:04,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:58:04,083 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:58:04,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-24 08:58:04,292 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,SelfDestructingSolverStorable13 [2023-08-24 08:58:04,293 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:58:04,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:58:04,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1849153399, now seen corresponding path program 11 times [2023-08-24 08:58:04,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:58:04,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961241677] [2023-08-24 08:58:04,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:58:04,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:58:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:58:04,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:04,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:58:04,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961241677] [2023-08-24 08:58:04,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961241677] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:58:04,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475203631] [2023-08-24 08:58:04,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:58:04,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:58:04,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:58:04,483 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 08:58:04,508 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 08:58:04,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 08:58:04,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:58:04,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 08:58:04,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:58:04,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:04,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:58:04,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:04,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475203631] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:58:04,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:58:04,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2023-08-24 08:58:04,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189878842] [2023-08-24 08:58:04,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:58:04,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 08:58:04,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:58:04,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 08:58:04,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2023-08-24 08:58:04,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 08:58:04,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 384 transitions, 6358 flow. Second operand has 21 states, 21 states have (on average 61.61904761904762) internal successors, (1294), 21 states have internal predecessors, (1294), 0 states have call successors, (0), 0 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 08:58:04,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:58:04,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 08:58:04,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:58:06,122 INFO L124 PetriNetUnfolderBase]: 1566/2573 cut-off events. [2023-08-24 08:58:06,123 INFO L125 PetriNetUnfolderBase]: For 49462/49462 co-relation queries the response was YES. [2023-08-24 08:58:06,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23408 conditions, 2573 events. 1566/2573 cut-off events. For 49462/49462 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 14126 event pairs, 83 based on Foata normal form. 32/2605 useless extension candidates. Maximal degree in co-relation 23107. Up to 849 conditions per place. [2023-08-24 08:58:06,149 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 246 selfloop transitions, 363 changer transitions 3/612 dead transitions. [2023-08-24 08:58:06,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 612 transitions, 11630 flow [2023-08-24 08:58:06,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 08:58:06,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 08:58:06,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1618 transitions. [2023-08-24 08:58:06,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43146666666666667 [2023-08-24 08:58:06,151 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1618 transitions. [2023-08-24 08:58:06,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1618 transitions. [2023-08-24 08:58:06,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:58:06,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1618 transitions. [2023-08-24 08:58:06,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 64.72) internal successors, (1618), 25 states have internal predecessors, (1618), 0 states have call successors, (0), 0 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 08:58:06,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 150.0) internal successors, (3900), 26 states have internal predecessors, (3900), 0 states have call successors, (0), 0 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 08:58:06,157 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 150.0) internal successors, (3900), 26 states have internal predecessors, (3900), 0 states have call successors, (0), 0 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 08:58:06,157 INFO L175 Difference]: Start difference. First operand has 174 places, 384 transitions, 6358 flow. Second operand 25 states and 1618 transitions. [2023-08-24 08:58:06,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 612 transitions, 11630 flow [2023-08-24 08:58:06,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 612 transitions, 10353 flow, removed 524 selfloop flow, removed 6 redundant places. [2023-08-24 08:58:06,376 INFO L231 Difference]: Finished difference. Result has 201 places, 536 transitions, 9556 flow [2023-08-24 08:58:06,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=5678, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=9556, PETRI_PLACES=201, PETRI_TRANSITIONS=536} [2023-08-24 08:58:06,376 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 181 predicate places. [2023-08-24 08:58:06,376 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 536 transitions, 9556 flow [2023-08-24 08:58:06,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 61.61904761904762) internal successors, (1294), 21 states have internal predecessors, (1294), 0 states have call successors, (0), 0 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 08:58:06,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:58:06,377 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:58:06,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-24 08:58:06,584 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,SelfDestructingSolverStorable14 [2023-08-24 08:58:06,585 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:58:06,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:58:06,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1824348431, now seen corresponding path program 12 times [2023-08-24 08:58:06,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:58:06,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775497382] [2023-08-24 08:58:06,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:58:06,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:58:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:58:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:06,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:58:06,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775497382] [2023-08-24 08:58:06,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775497382] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:58:06,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045992271] [2023-08-24 08:58:06,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:58:06,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:58:06,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:58:06,694 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 08:58:06,697 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 08:58:06,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 08:58:06,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:58:06,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 08:58:06,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:58:06,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:06,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:58:06,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:06,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045992271] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:58:06,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:58:06,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-08-24 08:58:06,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222338725] [2023-08-24 08:58:06,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:58:06,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 08:58:06,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:58:06,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 08:58:06,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-08-24 08:58:06,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 08:58:06,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 536 transitions, 9556 flow. Second operand has 17 states, 17 states have (on average 61.88235294117647) internal successors, (1052), 17 states have internal predecessors, (1052), 0 states have call successors, (0), 0 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 08:58:06,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:58:06,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 08:58:06,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:58:08,891 INFO L124 PetriNetUnfolderBase]: 1633/2712 cut-off events. [2023-08-24 08:58:08,891 INFO L125 PetriNetUnfolderBase]: For 53265/53265 co-relation queries the response was YES. [2023-08-24 08:58:08,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24726 conditions, 2712 events. 1633/2712 cut-off events. For 53265/53265 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 15239 event pairs, 87 based on Foata normal form. 64/2776 useless extension candidates. Maximal degree in co-relation 24483. Up to 823 conditions per place. [2023-08-24 08:58:08,914 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 292 selfloop transitions, 414 changer transitions 16/722 dead transitions. [2023-08-24 08:58:08,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 722 transitions, 13742 flow [2023-08-24 08:58:08,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-24 08:58:08,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-24 08:58:08,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2649 transitions. [2023-08-24 08:58:08,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43073170731707316 [2023-08-24 08:58:08,917 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2649 transitions. [2023-08-24 08:58:08,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2649 transitions. [2023-08-24 08:58:08,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:58:08,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2649 transitions. [2023-08-24 08:58:08,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 64.60975609756098) internal successors, (2649), 41 states have internal predecessors, (2649), 0 states have call successors, (0), 0 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 08:58:08,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 150.0) internal successors, (6300), 42 states have internal predecessors, (6300), 0 states have call successors, (0), 0 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 08:58:08,931 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 150.0) internal successors, (6300), 42 states have internal predecessors, (6300), 0 states have call successors, (0), 0 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 08:58:08,931 INFO L175 Difference]: Start difference. First operand has 201 places, 536 transitions, 9556 flow. Second operand 41 states and 2649 transitions. [2023-08-24 08:58:08,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 722 transitions, 13742 flow [2023-08-24 08:58:09,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 722 transitions, 12270 flow, removed 694 selfloop flow, removed 8 redundant places. [2023-08-24 08:58:09,240 INFO L231 Difference]: Finished difference. Result has 242 places, 572 transitions, 10479 flow [2023-08-24 08:58:09,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=8243, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=10479, PETRI_PLACES=242, PETRI_TRANSITIONS=572} [2023-08-24 08:58:09,241 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 222 predicate places. [2023-08-24 08:58:09,241 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 572 transitions, 10479 flow [2023-08-24 08:58:09,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 61.88235294117647) internal successors, (1052), 17 states have internal predecessors, (1052), 0 states have call successors, (0), 0 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 08:58:09,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:58:09,241 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:58:09,246 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 08:58:09,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:58:09,446 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:58:09,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:58:09,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1563164005, now seen corresponding path program 13 times [2023-08-24 08:58:09,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:58:09,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178002338] [2023-08-24 08:58:09,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:58:09,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:58:09,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:58:09,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:09,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:58:09,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178002338] [2023-08-24 08:58:09,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178002338] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:58:09,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715042629] [2023-08-24 08:58:09,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:58:09,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:58:09,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:58:09,571 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 08:58:09,573 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 08:58:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:58:09,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 08:58:09,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:58:09,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:09,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:58:09,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:09,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715042629] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:58:09,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:58:09,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-24 08:58:09,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790486163] [2023-08-24 08:58:09,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:58:09,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 08:58:09,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:58:09,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 08:58:09,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-08-24 08:58:09,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 08:58:09,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 572 transitions, 10479 flow. Second operand has 16 states, 16 states have (on average 61.9375) internal successors, (991), 16 states have internal predecessors, (991), 0 states have call successors, (0), 0 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 08:58:09,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:58:09,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 08:58:09,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:58:11,017 INFO L124 PetriNetUnfolderBase]: 1670/2781 cut-off events. [2023-08-24 08:58:11,018 INFO L125 PetriNetUnfolderBase]: For 38667/38667 co-relation queries the response was YES. [2023-08-24 08:58:11,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25067 conditions, 2781 events. 1670/2781 cut-off events. For 38667/38667 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 15828 event pairs, 120 based on Foata normal form. 20/2801 useless extension candidates. Maximal degree in co-relation 24807. Up to 1044 conditions per place. [2023-08-24 08:58:11,038 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 392 selfloop transitions, 349 changer transitions 3/744 dead transitions. [2023-08-24 08:58:11,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 744 transitions, 14016 flow [2023-08-24 08:58:11,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-24 08:58:11,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-24 08:58:11,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2524 transitions. [2023-08-24 08:58:11,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43145299145299143 [2023-08-24 08:58:11,041 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2524 transitions. [2023-08-24 08:58:11,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2524 transitions. [2023-08-24 08:58:11,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:58:11,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2524 transitions. [2023-08-24 08:58:11,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 64.71794871794872) internal successors, (2524), 39 states have internal predecessors, (2524), 0 states have call successors, (0), 0 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 08:58:11,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 150.0) internal successors, (6000), 40 states have internal predecessors, (6000), 0 states have call successors, (0), 0 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 08:58:11,050 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 150.0) internal successors, (6000), 40 states have internal predecessors, (6000), 0 states have call successors, (0), 0 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 08:58:11,050 INFO L175 Difference]: Start difference. First operand has 242 places, 572 transitions, 10479 flow. Second operand 39 states and 2524 transitions. [2023-08-24 08:58:11,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 744 transitions, 14016 flow [2023-08-24 08:58:11,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 744 transitions, 13259 flow, removed 277 selfloop flow, removed 17 redundant places. [2023-08-24 08:58:11,312 INFO L231 Difference]: Finished difference. Result has 270 places, 603 transitions, 11170 flow [2023-08-24 08:58:11,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=9790, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=11170, PETRI_PLACES=270, PETRI_TRANSITIONS=603} [2023-08-24 08:58:11,313 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 250 predicate places. [2023-08-24 08:58:11,313 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 603 transitions, 11170 flow [2023-08-24 08:58:11,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 61.9375) internal successors, (991), 16 states have internal predecessors, (991), 0 states have call successors, (0), 0 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 08:58:11,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:58:11,313 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:58:11,319 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 08:58:11,517 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,SelfDestructingSolverStorable16 [2023-08-24 08:58:11,517 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:58:11,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:58:11,517 INFO L85 PathProgramCache]: Analyzing trace with hash -383983579, now seen corresponding path program 14 times [2023-08-24 08:58:11,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:58:11,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224524104] [2023-08-24 08:58:11,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:58:11,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:58:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:58:11,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:11,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:58:11,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224524104] [2023-08-24 08:58:11,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224524104] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:58:11,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784061830] [2023-08-24 08:58:11,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:58:11,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:58:11,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:58:11,701 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 08:58:11,702 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 08:58:11,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:58:11,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:58:11,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 08:58:11,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:58:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:11,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:58:11,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:11,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784061830] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:58:11,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:58:11,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2023-08-24 08:58:11,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875981227] [2023-08-24 08:58:11,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:58:11,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 08:58:11,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:58:11,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 08:58:11,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2023-08-24 08:58:11,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 08:58:11,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 603 transitions, 11170 flow. Second operand has 22 states, 22 states have (on average 61.68181818181818) internal successors, (1357), 22 states have internal predecessors, (1357), 0 states have call successors, (0), 0 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 08:58:11,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:58:11,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 08:58:11,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:58:13,844 INFO L124 PetriNetUnfolderBase]: 1942/3163 cut-off events. [2023-08-24 08:58:13,844 INFO L125 PetriNetUnfolderBase]: For 51682/51682 co-relation queries the response was YES. [2023-08-24 08:58:13,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29424 conditions, 3163 events. 1942/3163 cut-off events. For 51682/51682 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 17900 event pairs, 72 based on Foata normal form. 80/3243 useless extension candidates. Maximal degree in co-relation 29153. Up to 956 conditions per place. [2023-08-24 08:58:13,866 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 189 selfloop transitions, 671 changer transitions 22/882 dead transitions. [2023-08-24 08:58:13,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 882 transitions, 17538 flow [2023-08-24 08:58:13,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-24 08:58:13,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-24 08:58:13,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3034 transitions. [2023-08-24 08:58:13,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43035460992907804 [2023-08-24 08:58:13,869 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3034 transitions. [2023-08-24 08:58:13,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3034 transitions. [2023-08-24 08:58:13,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:58:13,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3034 transitions. [2023-08-24 08:58:13,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 64.55319148936171) internal successors, (3034), 47 states have internal predecessors, (3034), 0 states have call successors, (0), 0 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 08:58:13,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 150.0) internal successors, (7200), 48 states have internal predecessors, (7200), 0 states have call successors, (0), 0 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 08:58:13,878 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 150.0) internal successors, (7200), 48 states have internal predecessors, (7200), 0 states have call successors, (0), 0 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 08:58:13,878 INFO L175 Difference]: Start difference. First operand has 270 places, 603 transitions, 11170 flow. Second operand 47 states and 3034 transitions. [2023-08-24 08:58:13,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 882 transitions, 17538 flow [2023-08-24 08:58:14,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 882 transitions, 17072 flow, removed 134 selfloop flow, removed 15 redundant places. [2023-08-24 08:58:14,188 INFO L231 Difference]: Finished difference. Result has 306 places, 769 transitions, 16132 flow [2023-08-24 08:58:14,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=10747, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=517, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=16132, PETRI_PLACES=306, PETRI_TRANSITIONS=769} [2023-08-24 08:58:14,189 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 286 predicate places. [2023-08-24 08:58:14,189 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 769 transitions, 16132 flow [2023-08-24 08:58:14,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 61.68181818181818) internal successors, (1357), 22 states have internal predecessors, (1357), 0 states have call successors, (0), 0 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 08:58:14,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:58:14,190 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:58:14,194 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 08:58:14,390 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,SelfDestructingSolverStorable17 [2023-08-24 08:58:14,390 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:58:14,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:58:14,390 INFO L85 PathProgramCache]: Analyzing trace with hash 641572051, now seen corresponding path program 15 times [2023-08-24 08:58:14,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:58:14,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103615812] [2023-08-24 08:58:14,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:58:14,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:58:14,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:58:14,493 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:14,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:58:14,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103615812] [2023-08-24 08:58:14,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103615812] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:58:14,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831043650] [2023-08-24 08:58:14,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:58:14,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:58:14,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:58:14,494 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 08:58:14,496 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 08:58:14,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 08:58:14,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:58:14,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 08:58:14,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:58:14,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:14,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:58:14,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:14,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831043650] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:58:14,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:58:14,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-24 08:58:14,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611385389] [2023-08-24 08:58:14,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:58:14,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 08:58:14,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:58:14,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 08:58:14,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-08-24 08:58:14,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 08:58:14,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 769 transitions, 16132 flow. Second operand has 16 states, 16 states have (on average 61.6875) internal successors, (987), 16 states have internal predecessors, (987), 0 states have call successors, (0), 0 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 08:58:14,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:58:14,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 08:58:14,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:58:16,284 INFO L124 PetriNetUnfolderBase]: 2273/3720 cut-off events. [2023-08-24 08:58:16,284 INFO L125 PetriNetUnfolderBase]: For 71863/71863 co-relation queries the response was YES. [2023-08-24 08:58:16,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37855 conditions, 3720 events. 2273/3720 cut-off events. For 71863/71863 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 21672 event pairs, 374 based on Foata normal form. 18/3738 useless extension candidates. Maximal degree in co-relation 37557. Up to 2622 conditions per place. [2023-08-24 08:58:16,367 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 748 selfloop transitions, 279 changer transitions 1/1028 dead transitions. [2023-08-24 08:58:16,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 1028 transitions, 23017 flow [2023-08-24 08:58:16,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-24 08:58:16,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-24 08:58:16,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2589 transitions. [2023-08-24 08:58:16,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315 [2023-08-24 08:58:16,414 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2589 transitions. [2023-08-24 08:58:16,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2589 transitions. [2023-08-24 08:58:16,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:58:16,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2589 transitions. [2023-08-24 08:58:16,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 64.725) internal successors, (2589), 40 states have internal predecessors, (2589), 0 states have call successors, (0), 0 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 08:58:16,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 150.0) internal successors, (6150), 41 states have internal predecessors, (6150), 0 states have call successors, (0), 0 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 08:58:16,421 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 150.0) internal successors, (6150), 41 states have internal predecessors, (6150), 0 states have call successors, (0), 0 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 08:58:16,421 INFO L175 Difference]: Start difference. First operand has 306 places, 769 transitions, 16132 flow. Second operand 40 states and 2589 transitions. [2023-08-24 08:58:16,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 1028 transitions, 23017 flow [2023-08-24 08:58:16,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 1028 transitions, 21125 flow, removed 848 selfloop flow, removed 20 redundant places. [2023-08-24 08:58:16,999 INFO L231 Difference]: Finished difference. Result has 336 places, 873 transitions, 17908 flow [2023-08-24 08:58:16,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=14670, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=17908, PETRI_PLACES=336, PETRI_TRANSITIONS=873} [2023-08-24 08:58:17,000 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 316 predicate places. [2023-08-24 08:58:17,000 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 873 transitions, 17908 flow [2023-08-24 08:58:17,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 61.6875) internal successors, (987), 16 states have internal predecessors, (987), 0 states have call successors, (0), 0 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 08:58:17,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:58:17,000 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:58:17,006 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 08:58:17,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:58:17,204 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:58:17,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:58:17,205 INFO L85 PathProgramCache]: Analyzing trace with hash 637338655, now seen corresponding path program 16 times [2023-08-24 08:58:17,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:58:17,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808009910] [2023-08-24 08:58:17,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:58:17,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:58:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:58:17,378 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:17,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:58:17,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808009910] [2023-08-24 08:58:17,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808009910] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:58:17,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482174691] [2023-08-24 08:58:17,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:58:17,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:58:17,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:58:17,379 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 08:58:17,381 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 08:58:17,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:58:17,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:58:17,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 08:58:17,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:58:17,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:17,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:58:17,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:17,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482174691] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:58:17,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:58:17,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2023-08-24 08:58:17,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321136037] [2023-08-24 08:58:17,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:58:17,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 08:58:17,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:58:17,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 08:58:17,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2023-08-24 08:58:17,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 08:58:17,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 873 transitions, 17908 flow. Second operand has 22 states, 22 states have (on average 61.54545454545455) internal successors, (1354), 22 states have internal predecessors, (1354), 0 states have call successors, (0), 0 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 08:58:17,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:58:17,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 08:58:17,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:58:19,526 INFO L124 PetriNetUnfolderBase]: 2515/4078 cut-off events. [2023-08-24 08:58:19,527 INFO L125 PetriNetUnfolderBase]: For 75991/75991 co-relation queries the response was YES. [2023-08-24 08:58:19,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40555 conditions, 4078 events. 2515/4078 cut-off events. For 75991/75991 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 24051 event pairs, 202 based on Foata normal form. 28/4106 useless extension candidates. Maximal degree in co-relation 40255. Up to 1784 conditions per place. [2023-08-24 08:58:19,567 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 327 selfloop transitions, 725 changer transitions 10/1062 dead transitions. [2023-08-24 08:58:19,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 1062 transitions, 22904 flow [2023-08-24 08:58:19,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-24 08:58:19,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-24 08:58:19,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2444 transitions. [2023-08-24 08:58:19,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4287719298245614 [2023-08-24 08:58:19,570 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2444 transitions. [2023-08-24 08:58:19,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2444 transitions. [2023-08-24 08:58:19,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:58:19,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2444 transitions. [2023-08-24 08:58:19,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 64.3157894736842) internal successors, (2444), 38 states have internal predecessors, (2444), 0 states have call successors, (0), 0 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 08:58:19,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 150.0) internal successors, (5850), 39 states have internal predecessors, (5850), 0 states have call successors, (0), 0 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 08:58:19,577 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 150.0) internal successors, (5850), 39 states have internal predecessors, (5850), 0 states have call successors, (0), 0 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 08:58:19,577 INFO L175 Difference]: Start difference. First operand has 336 places, 873 transitions, 17908 flow. Second operand 38 states and 2444 transitions. [2023-08-24 08:58:19,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 1062 transitions, 22904 flow [2023-08-24 08:58:20,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 1062 transitions, 22368 flow, removed 202 selfloop flow, removed 14 redundant places. [2023-08-24 08:58:20,247 INFO L231 Difference]: Finished difference. Result has 367 places, 989 transitions, 21976 flow [2023-08-24 08:58:20,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=17357, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=872, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=610, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=21976, PETRI_PLACES=367, PETRI_TRANSITIONS=989} [2023-08-24 08:58:20,248 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 347 predicate places. [2023-08-24 08:58:20,248 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 989 transitions, 21976 flow [2023-08-24 08:58:20,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 61.54545454545455) internal successors, (1354), 22 states have internal predecessors, (1354), 0 states have call successors, (0), 0 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 08:58:20,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:58:20,249 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:58:20,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-24 08:58:20,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:58:20,453 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:58:20,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:58:20,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1441957617, now seen corresponding path program 17 times [2023-08-24 08:58:20,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:58:20,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588362001] [2023-08-24 08:58:20,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:58:20,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:58:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:58:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:20,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:58:20,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588362001] [2023-08-24 08:58:20,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588362001] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:58:20,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332862877] [2023-08-24 08:58:20,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:58:20,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:58:20,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:58:20,607 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:58:20,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-24 08:58:20,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 08:58:20,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:58:20,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 08:58:20,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:58:20,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:20,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:58:20,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:20,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332862877] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:58:20,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:58:20,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-24 08:58:20,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852812780] [2023-08-24 08:58:20,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:58:20,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 08:58:20,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:58:20,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 08:58:20,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-08-24 08:58:20,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 08:58:20,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 989 transitions, 21976 flow. Second operand has 18 states, 18 states have (on average 61.833333333333336) internal successors, (1113), 18 states have internal predecessors, (1113), 0 states have call successors, (0), 0 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 08:58:20,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:58:20,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 08:58:20,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:58:23,956 INFO L124 PetriNetUnfolderBase]: 2795/4574 cut-off events. [2023-08-24 08:58:23,956 INFO L125 PetriNetUnfolderBase]: For 101870/101870 co-relation queries the response was YES. [2023-08-24 08:58:23,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48884 conditions, 4574 events. 2795/4574 cut-off events. For 101870/101870 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 27907 event pairs, 429 based on Foata normal form. 34/4608 useless extension candidates. Maximal degree in co-relation 48565. Up to 3175 conditions per place. [2023-08-24 08:58:23,994 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 799 selfloop transitions, 399 changer transitions 12/1210 dead transitions. [2023-08-24 08:58:23,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 1210 transitions, 28530 flow [2023-08-24 08:58:23,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-24 08:58:23,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-24 08:58:23,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2823 transitions. [2023-08-24 08:58:23,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42772727272727273 [2023-08-24 08:58:23,997 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2823 transitions. [2023-08-24 08:58:23,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2823 transitions. [2023-08-24 08:58:23,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:58:23,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2823 transitions. [2023-08-24 08:58:24,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 64.1590909090909) internal successors, (2823), 44 states have internal predecessors, (2823), 0 states have call successors, (0), 0 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 08:58:24,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 150.0) internal successors, (6750), 45 states have internal predecessors, (6750), 0 states have call successors, (0), 0 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 08:58:24,003 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 150.0) internal successors, (6750), 45 states have internal predecessors, (6750), 0 states have call successors, (0), 0 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 08:58:24,003 INFO L175 Difference]: Start difference. First operand has 367 places, 989 transitions, 21976 flow. Second operand 44 states and 2823 transitions. [2023-08-24 08:58:24,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 1210 transitions, 28530 flow [2023-08-24 08:58:24,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 1210 transitions, 27719 flow, removed 156 selfloop flow, removed 18 redundant places. [2023-08-24 08:58:24,976 INFO L231 Difference]: Finished difference. Result has 403 places, 1077 transitions, 24841 flow [2023-08-24 08:58:24,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=21238, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=987, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=315, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=24841, PETRI_PLACES=403, PETRI_TRANSITIONS=1077} [2023-08-24 08:58:24,977 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 383 predicate places. [2023-08-24 08:58:24,977 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 1077 transitions, 24841 flow [2023-08-24 08:58:24,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 61.833333333333336) internal successors, (1113), 18 states have internal predecessors, (1113), 0 states have call successors, (0), 0 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 08:58:24,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:58:24,978 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:58:24,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-24 08:58:25,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:58:25,178 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:58:25,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:58:25,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1995368961, now seen corresponding path program 18 times [2023-08-24 08:58:25,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:58:25,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527441728] [2023-08-24 08:58:25,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:58:25,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:58:25,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:58:25,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:25,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:58:25,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527441728] [2023-08-24 08:58:25,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527441728] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:58:25,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877885620] [2023-08-24 08:58:25,275 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:58:25,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:58:25,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:58:25,276 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:58:25,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-24 08:58:25,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 08:58:25,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:58:25,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 08:58:25,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:58:25,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:25,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:58:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:25,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877885620] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:58:25,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:58:25,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-08-24 08:58:25,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604542829] [2023-08-24 08:58:25,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:58:25,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 08:58:25,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:58:25,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 08:58:25,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-08-24 08:58:25,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 08:58:25,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 1077 transitions, 24841 flow. Second operand has 17 states, 17 states have (on average 61.64705882352941) internal successors, (1048), 17 states have internal predecessors, (1048), 0 states have call successors, (0), 0 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 08:58:25,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:58:25,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 08:58:25,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:58:28,606 INFO L124 PetriNetUnfolderBase]: 2957/4850 cut-off events. [2023-08-24 08:58:28,606 INFO L125 PetriNetUnfolderBase]: For 110056/110056 co-relation queries the response was YES. [2023-08-24 08:58:28,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52559 conditions, 4850 events. 2957/4850 cut-off events. For 110056/110056 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 29785 event pairs, 645 based on Foata normal form. 28/4878 useless extension candidates. Maximal degree in co-relation 52225. Up to 3973 conditions per place. [2023-08-24 08:58:28,654 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 948 selfloop transitions, 258 changer transitions 16/1222 dead transitions. [2023-08-24 08:58:28,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 1222 transitions, 29670 flow [2023-08-24 08:58:28,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-24 08:58:28,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-24 08:58:28,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2126 transitions. [2023-08-24 08:58:28,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4294949494949495 [2023-08-24 08:58:28,656 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2126 transitions. [2023-08-24 08:58:28,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2126 transitions. [2023-08-24 08:58:28,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:58:28,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2126 transitions. [2023-08-24 08:58:28,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 64.42424242424242) internal successors, (2126), 33 states have internal predecessors, (2126), 0 states have call successors, (0), 0 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 08:58:28,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 150.0) internal successors, (5100), 34 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:58:28,664 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 150.0) internal successors, (5100), 34 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:58:28,664 INFO L175 Difference]: Start difference. First operand has 403 places, 1077 transitions, 24841 flow. Second operand 33 states and 2126 transitions. [2023-08-24 08:58:28,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 1222 transitions, 29670 flow [2023-08-24 08:58:29,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 1222 transitions, 29137 flow, removed 195 selfloop flow, removed 21 redundant places. [2023-08-24 08:58:29,892 INFO L231 Difference]: Finished difference. Result has 426 places, 1142 transitions, 26798 flow [2023-08-24 08:58:29,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=24210, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1071, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=835, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=26798, PETRI_PLACES=426, PETRI_TRANSITIONS=1142} [2023-08-24 08:58:29,893 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 406 predicate places. [2023-08-24 08:58:29,893 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 1142 transitions, 26798 flow [2023-08-24 08:58:29,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 61.64705882352941) internal successors, (1048), 17 states have internal predecessors, (1048), 0 states have call successors, (0), 0 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 08:58:29,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:58:29,893 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:58:29,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-24 08:58:30,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-24 08:58:30,094 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:58:30,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:58:30,094 INFO L85 PathProgramCache]: Analyzing trace with hash -606005531, now seen corresponding path program 19 times [2023-08-24 08:58:30,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:58:30,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372502712] [2023-08-24 08:58:30,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:58:30,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:58:30,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:58:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:30,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:58:30,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372502712] [2023-08-24 08:58:30,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372502712] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:58:30,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419618337] [2023-08-24 08:58:30,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:58:30,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:58:30,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:58:30,214 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:58:30,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-24 08:58:30,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:58:30,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 08:58:30,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:58:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:30,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:58:30,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:30,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419618337] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:58:30,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:58:30,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-24 08:58:30,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981813114] [2023-08-24 08:58:30,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:58:30,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 08:58:30,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:58:30,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 08:58:30,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-08-24 08:58:30,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 08:58:30,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 1142 transitions, 26798 flow. Second operand has 16 states, 16 states have (on average 61.9375) internal successors, (991), 16 states have internal predecessors, (991), 0 states have call successors, (0), 0 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 08:58:30,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:58:30,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 08:58:30,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:58:32,821 INFO L124 PetriNetUnfolderBase]: 3191/5268 cut-off events. [2023-08-24 08:58:32,821 INFO L125 PetriNetUnfolderBase]: For 130924/130924 co-relation queries the response was YES. [2023-08-24 08:58:32,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58716 conditions, 5268 events. 3191/5268 cut-off events. For 130924/130924 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 33183 event pairs, 717 based on Foata normal form. 28/5296 useless extension candidates. Maximal degree in co-relation 58371. Up to 4417 conditions per place. [2023-08-24 08:58:32,879 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 1135 selfloop transitions, 204 changer transitions 5/1344 dead transitions. [2023-08-24 08:58:32,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 1344 transitions, 33716 flow [2023-08-24 08:58:32,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-24 08:58:32,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-24 08:58:32,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2389 transitions. [2023-08-24 08:58:32,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43045045045045044 [2023-08-24 08:58:32,883 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2389 transitions. [2023-08-24 08:58:32,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2389 transitions. [2023-08-24 08:58:32,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:58:32,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2389 transitions. [2023-08-24 08:58:32,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 64.56756756756756) internal successors, (2389), 37 states have internal predecessors, (2389), 0 states have call successors, (0), 0 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 08:58:32,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 150.0) internal successors, (5700), 38 states have internal predecessors, (5700), 0 states have call successors, (0), 0 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 08:58:32,888 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 150.0) internal successors, (5700), 38 states have internal predecessors, (5700), 0 states have call successors, (0), 0 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 08:58:32,888 INFO L175 Difference]: Start difference. First operand has 426 places, 1142 transitions, 26798 flow. Second operand 37 states and 2389 transitions. [2023-08-24 08:58:32,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 1344 transitions, 33716 flow [2023-08-24 08:58:34,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 1344 transitions, 32868 flow, removed 303 selfloop flow, removed 19 redundant places. [2023-08-24 08:58:34,307 INFO L231 Difference]: Finished difference. Result has 451 places, 1220 transitions, 28994 flow [2023-08-24 08:58:34,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=26255, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=979, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=28994, PETRI_PLACES=451, PETRI_TRANSITIONS=1220} [2023-08-24 08:58:34,308 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 431 predicate places. [2023-08-24 08:58:34,308 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 1220 transitions, 28994 flow [2023-08-24 08:58:34,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 61.9375) internal successors, (991), 16 states have internal predecessors, (991), 0 states have call successors, (0), 0 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 08:58:34,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:58:34,308 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:58:34,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-24 08:58:34,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-24 08:58:34,512 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:58:34,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:58:34,512 INFO L85 PathProgramCache]: Analyzing trace with hash 179878509, now seen corresponding path program 20 times [2023-08-24 08:58:34,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:58:34,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012539269] [2023-08-24 08:58:34,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:58:34,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:58:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:58:34,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:34,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:58:34,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012539269] [2023-08-24 08:58:34,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012539269] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:58:34,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417060086] [2023-08-24 08:58:34,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:58:34,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:58:34,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:58:34,665 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:58:34,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-24 08:58:34,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:58:34,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:58:34,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 08:58:34,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:58:34,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:34,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:58:34,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:34,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417060086] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:58:34,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:58:34,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2023-08-24 08:58:34,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112595493] [2023-08-24 08:58:34,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:58:34,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 08:58:34,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:58:34,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 08:58:34,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-08-24 08:58:34,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 08:58:34,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 1220 transitions, 28994 flow. Second operand has 21 states, 21 states have (on average 61.57142857142857) internal successors, (1293), 21 states have internal predecessors, (1293), 0 states have call successors, (0), 0 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 08:58:34,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:58:34,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 08:58:34,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:58:38,031 INFO L124 PetriNetUnfolderBase]: 3421/5614 cut-off events. [2023-08-24 08:58:38,031 INFO L125 PetriNetUnfolderBase]: For 142519/142519 co-relation queries the response was YES. [2023-08-24 08:58:38,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62961 conditions, 5614 events. 3421/5614 cut-off events. For 142519/142519 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 35549 event pairs, 522 based on Foata normal form. 24/5638 useless extension candidates. Maximal degree in co-relation 62557. Up to 3702 conditions per place. [2023-08-24 08:58:38,097 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 698 selfloop transitions, 725 changer transitions 16/1439 dead transitions. [2023-08-24 08:58:38,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 1439 transitions, 36382 flow [2023-08-24 08:58:38,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-24 08:58:38,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-24 08:58:38,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1996 transitions. [2023-08-24 08:58:38,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.429247311827957 [2023-08-24 08:58:38,100 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1996 transitions. [2023-08-24 08:58:38,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1996 transitions. [2023-08-24 08:58:38,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:58:38,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1996 transitions. [2023-08-24 08:58:38,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 64.38709677419355) internal successors, (1996), 31 states have internal predecessors, (1996), 0 states have call successors, (0), 0 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 08:58:38,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 150.0) internal successors, (4800), 32 states have internal predecessors, (4800), 0 states have call successors, (0), 0 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 08:58:38,105 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 150.0) internal successors, (4800), 32 states have internal predecessors, (4800), 0 states have call successors, (0), 0 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 08:58:38,105 INFO L175 Difference]: Start difference. First operand has 451 places, 1220 transitions, 28994 flow. Second operand 31 states and 1996 transitions. [2023-08-24 08:58:38,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 1439 transitions, 36382 flow [2023-08-24 08:58:39,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 1439 transitions, 35706 flow, removed 271 selfloop flow, removed 17 redundant places. [2023-08-24 08:58:39,745 INFO L231 Difference]: Finished difference. Result has 470 places, 1377 transitions, 34697 flow [2023-08-24 08:58:39,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=28318, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=579, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=34697, PETRI_PLACES=470, PETRI_TRANSITIONS=1377} [2023-08-24 08:58:39,746 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 450 predicate places. [2023-08-24 08:58:39,746 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 1377 transitions, 34697 flow [2023-08-24 08:58:39,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 61.57142857142857) internal successors, (1293), 21 states have internal predecessors, (1293), 0 states have call successors, (0), 0 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 08:58:39,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:58:39,747 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:58:39,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-24 08:58:39,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:58:39,950 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:58:39,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:58:39,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1020773903, now seen corresponding path program 21 times [2023-08-24 08:58:39,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:58:39,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902733737] [2023-08-24 08:58:39,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:58:39,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:58:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:58:40,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:40,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:58:40,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902733737] [2023-08-24 08:58:40,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902733737] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:58:40,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299995689] [2023-08-24 08:58:40,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:58:40,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:58:40,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:58:40,141 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:58:40,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-24 08:58:40,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-24 08:58:40,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:58:40,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 08:58:40,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:58:40,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:40,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:58:40,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:40,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299995689] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:58:40,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:58:40,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2023-08-24 08:58:40,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724395009] [2023-08-24 08:58:40,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:58:40,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 08:58:40,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:58:40,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 08:58:40,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2023-08-24 08:58:40,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 08:58:40,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 1377 transitions, 34697 flow. Second operand has 21 states, 21 states have (on average 61.666666666666664) internal successors, (1295), 21 states have internal predecessors, (1295), 0 states have call successors, (0), 0 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 08:58:40,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:58:40,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 08:58:40,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:58:44,286 INFO L124 PetriNetUnfolderBase]: 3413/5621 cut-off events. [2023-08-24 08:58:44,286 INFO L125 PetriNetUnfolderBase]: For 169122/169122 co-relation queries the response was YES. [2023-08-24 08:58:44,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66911 conditions, 5621 events. 3413/5621 cut-off events. For 169122/169122 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 35711 event pairs, 408 based on Foata normal form. 48/5669 useless extension candidates. Maximal degree in co-relation 66475. Up to 3131 conditions per place. [2023-08-24 08:58:44,344 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 629 selfloop transitions, 824 changer transitions 2/1455 dead transitions. [2023-08-24 08:58:44,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 1455 transitions, 38706 flow [2023-08-24 08:58:44,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-24 08:58:44,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-24 08:58:44,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2388 transitions. [2023-08-24 08:58:44,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43027027027027026 [2023-08-24 08:58:44,346 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2388 transitions. [2023-08-24 08:58:44,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2388 transitions. [2023-08-24 08:58:44,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:58:44,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2388 transitions. [2023-08-24 08:58:44,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 64.54054054054055) internal successors, (2388), 37 states have internal predecessors, (2388), 0 states have call successors, (0), 0 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 08:58:44,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 150.0) internal successors, (5700), 38 states have internal predecessors, (5700), 0 states have call successors, (0), 0 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 08:58:44,351 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 150.0) internal successors, (5700), 38 states have internal predecessors, (5700), 0 states have call successors, (0), 0 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 08:58:44,351 INFO L175 Difference]: Start difference. First operand has 470 places, 1377 transitions, 34697 flow. Second operand 37 states and 2388 transitions. [2023-08-24 08:58:44,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 1455 transitions, 38706 flow [2023-08-24 08:58:46,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 1455 transitions, 37400 flow, removed 585 selfloop flow, removed 10 redundant places. [2023-08-24 08:58:46,280 INFO L231 Difference]: Finished difference. Result has 497 places, 1392 transitions, 35746 flow [2023-08-24 08:58:46,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=33488, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=804, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=35746, PETRI_PLACES=497, PETRI_TRANSITIONS=1392} [2023-08-24 08:58:46,281 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 477 predicate places. [2023-08-24 08:58:46,281 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 1392 transitions, 35746 flow [2023-08-24 08:58:46,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 61.666666666666664) internal successors, (1295), 21 states have internal predecessors, (1295), 0 states have call successors, (0), 0 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 08:58:46,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:58:46,281 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:58:46,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-24 08:58:46,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:58:46,482 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:58:46,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:58:46,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1908018907, now seen corresponding path program 22 times [2023-08-24 08:58:46,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:58:46,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098649435] [2023-08-24 08:58:46,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:58:46,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:58:46,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:58:46,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:46,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:58:46,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098649435] [2023-08-24 08:58:46,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098649435] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:58:46,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673531377] [2023-08-24 08:58:46,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:58:46,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:58:46,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:58:46,575 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:58:46,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-24 08:58:46,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:58:46,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:58:46,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 08:58:46,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:58:46,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:46,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:58:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:46,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673531377] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:58:46,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:58:46,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-24 08:58:46,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658693124] [2023-08-24 08:58:46,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:58:46,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 08:58:46,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:58:46,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 08:58:46,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-08-24 08:58:46,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 08:58:46,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 1392 transitions, 35746 flow. Second operand has 16 states, 16 states have (on average 61.875) internal successors, (990), 16 states have internal predecessors, (990), 0 states have call successors, (0), 0 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 08:58:46,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:58:46,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 08:58:46,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:58:49,442 INFO L124 PetriNetUnfolderBase]: 3582/5898 cut-off events. [2023-08-24 08:58:49,442 INFO L125 PetriNetUnfolderBase]: For 185392/185392 co-relation queries the response was YES. [2023-08-24 08:58:49,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71286 conditions, 5898 events. 3582/5898 cut-off events. For 185392/185392 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 37922 event pairs, 857 based on Foata normal form. 40/5938 useless extension candidates. Maximal degree in co-relation 70726. Up to 5280 conditions per place. [2023-08-24 08:58:49,511 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 1393 selfloop transitions, 159 changer transitions 4/1556 dead transitions. [2023-08-24 08:58:49,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 1556 transitions, 41831 flow [2023-08-24 08:58:49,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-24 08:58:49,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-24 08:58:49,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2389 transitions. [2023-08-24 08:58:49,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43045045045045044 [2023-08-24 08:58:49,513 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2389 transitions. [2023-08-24 08:58:49,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2389 transitions. [2023-08-24 08:58:49,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:58:49,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2389 transitions. [2023-08-24 08:58:49,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 64.56756756756756) internal successors, (2389), 37 states have internal predecessors, (2389), 0 states have call successors, (0), 0 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 08:58:49,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 150.0) internal successors, (5700), 38 states have internal predecessors, (5700), 0 states have call successors, (0), 0 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 08:58:49,518 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 150.0) internal successors, (5700), 38 states have internal predecessors, (5700), 0 states have call successors, (0), 0 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 08:58:49,518 INFO L175 Difference]: Start difference. First operand has 497 places, 1392 transitions, 35746 flow. Second operand 37 states and 2389 transitions. [2023-08-24 08:58:49,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 1556 transitions, 41831 flow [2023-08-24 08:58:51,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 1556 transitions, 39953 flow, removed 215 selfloop flow, removed 25 redundant places. [2023-08-24 08:58:51,745 INFO L231 Difference]: Finished difference. Result has 518 places, 1444 transitions, 35683 flow [2023-08-24 08:58:51,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=34024, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=35683, PETRI_PLACES=518, PETRI_TRANSITIONS=1444} [2023-08-24 08:58:51,746 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 498 predicate places. [2023-08-24 08:58:51,746 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 1444 transitions, 35683 flow [2023-08-24 08:58:51,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 61.875) internal successors, (990), 16 states have internal predecessors, (990), 0 states have call successors, (0), 0 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 08:58:51,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:58:51,746 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:58:51,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-24 08:58:51,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-24 08:58:51,947 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:58:51,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:58:51,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1894514583, now seen corresponding path program 23 times [2023-08-24 08:58:51,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:58:51,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461530979] [2023-08-24 08:58:51,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:58:51,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:58:51,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:58:52,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:52,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:58:52,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461530979] [2023-08-24 08:58:52,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461530979] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:58:52,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45122787] [2023-08-24 08:58:52,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:58:52,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:58:52,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:58:52,054 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:58:52,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-24 08:58:52,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 08:58:52,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:58:52,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 08:58:52,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:58:52,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:52,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:58:52,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:52,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45122787] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:58:52,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:58:52,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-08-24 08:58:52,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584267452] [2023-08-24 08:58:52,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:58:52,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 08:58:52,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:58:52,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 08:58:52,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-08-24 08:58:52,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 08:58:52,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 1444 transitions, 35683 flow. Second operand has 17 states, 17 states have (on average 61.8235294117647) internal successors, (1051), 17 states have internal predecessors, (1051), 0 states have call successors, (0), 0 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 08:58:52,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:58:52,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 08:58:52,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:58:55,464 INFO L124 PetriNetUnfolderBase]: 3852/6370 cut-off events. [2023-08-24 08:58:55,464 INFO L125 PetriNetUnfolderBase]: For 211940/211940 co-relation queries the response was YES. [2023-08-24 08:58:55,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75639 conditions, 6370 events. 3852/6370 cut-off events. For 211940/211940 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 41511 event pairs, 692 based on Foata normal form. 26/6396 useless extension candidates. Maximal degree in co-relation 75114. Up to 4499 conditions per place. [2023-08-24 08:58:55,544 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 1110 selfloop transitions, 510 changer transitions 12/1632 dead transitions. [2023-08-24 08:58:55,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 1632 transitions, 42762 flow [2023-08-24 08:58:55,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-24 08:58:55,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-24 08:58:55,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2379 transitions. [2023-08-24 08:58:55,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42864864864864866 [2023-08-24 08:58:55,546 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2379 transitions. [2023-08-24 08:58:55,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2379 transitions. [2023-08-24 08:58:55,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:58:55,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2379 transitions. [2023-08-24 08:58:55,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 64.29729729729729) internal successors, (2379), 37 states have internal predecessors, (2379), 0 states have call successors, (0), 0 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 08:58:55,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 150.0) internal successors, (5700), 38 states have internal predecessors, (5700), 0 states have call successors, (0), 0 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 08:58:55,551 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 150.0) internal successors, (5700), 38 states have internal predecessors, (5700), 0 states have call successors, (0), 0 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 08:58:55,551 INFO L175 Difference]: Start difference. First operand has 518 places, 1444 transitions, 35683 flow. Second operand 37 states and 2379 transitions. [2023-08-24 08:58:55,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 1632 transitions, 42762 flow [2023-08-24 08:58:58,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 1632 transitions, 41857 flow, removed 355 selfloop flow, removed 22 redundant places. [2023-08-24 08:58:58,183 INFO L231 Difference]: Finished difference. Result has 544 places, 1551 transitions, 39662 flow [2023-08-24 08:58:58,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=34901, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=415, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=960, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=39662, PETRI_PLACES=544, PETRI_TRANSITIONS=1551} [2023-08-24 08:58:58,184 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 524 predicate places. [2023-08-24 08:58:58,184 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 1551 transitions, 39662 flow [2023-08-24 08:58:58,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 61.8235294117647) internal successors, (1051), 17 states have internal predecessors, (1051), 0 states have call successors, (0), 0 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 08:58:58,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:58:58,185 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:58:58,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-24 08:58:58,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-24 08:58:58,385 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:58:58,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:58:58,385 INFO L85 PathProgramCache]: Analyzing trace with hash 2016535816, now seen corresponding path program 24 times [2023-08-24 08:58:58,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:58:58,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6142039] [2023-08-24 08:58:58,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:58:58,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:58:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:58:58,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:58,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:58:58,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6142039] [2023-08-24 08:58:58,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6142039] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:58:58,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725544845] [2023-08-24 08:58:58,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:58:58,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:58:58,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:58:58,485 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:58:58,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-24 08:58:58,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 08:58:58,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:58:58,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-24 08:58:58,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:58:58,656 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:58,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:58:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:58:58,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725544845] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:58:58,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:58:58,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 15 [2023-08-24 08:58:58,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210242294] [2023-08-24 08:58:58,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:58:58,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 08:58:58,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:58:58,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 08:58:58,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-08-24 08:58:58,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 150 [2023-08-24 08:58:58,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 1551 transitions, 39662 flow. Second operand has 17 states, 17 states have (on average 61.0) internal successors, (1037), 17 states have internal predecessors, (1037), 0 states have call successors, (0), 0 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 08:58:58,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:58:58,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 150 [2023-08-24 08:58:58,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:59:01,918 INFO L124 PetriNetUnfolderBase]: 5100/8539 cut-off events. [2023-08-24 08:59:01,918 INFO L125 PetriNetUnfolderBase]: For 273278/273287 co-relation queries the response was YES. [2023-08-24 08:59:01,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103345 conditions, 8539 events. 5100/8539 cut-off events. For 273278/273287 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 59709 event pairs, 82 based on Foata normal form. 35/8574 useless extension candidates. Maximal degree in co-relation 102783. Up to 4512 conditions per place. [2023-08-24 08:59:02,051 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 1307 selfloop transitions, 734 changer transitions 126/2175 dead transitions. [2023-08-24 08:59:02,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 2175 transitions, 59451 flow [2023-08-24 08:59:02,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 08:59:02,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 08:59:02,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 527 transitions. [2023-08-24 08:59:02,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43916666666666665 [2023-08-24 08:59:02,052 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 527 transitions. [2023-08-24 08:59:02,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 527 transitions. [2023-08-24 08:59:02,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:59:02,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 527 transitions. [2023-08-24 08:59:02,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 65.875) internal successors, (527), 8 states have internal predecessors, (527), 0 states have call successors, (0), 0 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 08:59:02,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 150.0) internal successors, (1350), 9 states have internal predecessors, (1350), 0 states have call successors, (0), 0 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 08:59:02,054 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 150.0) internal successors, (1350), 9 states have internal predecessors, (1350), 0 states have call successors, (0), 0 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 08:59:02,054 INFO L175 Difference]: Start difference. First operand has 544 places, 1551 transitions, 39662 flow. Second operand 8 states and 527 transitions. [2023-08-24 08:59:02,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 2175 transitions, 59451 flow [2023-08-24 08:59:06,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 2175 transitions, 58643 flow, removed 226 selfloop flow, removed 23 redundant places. [2023-08-24 08:59:06,210 INFO L231 Difference]: Finished difference. Result has 532 places, 1818 transitions, 49109 flow [2023-08-24 08:59:06,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=39109, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=445, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=835, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=49109, PETRI_PLACES=532, PETRI_TRANSITIONS=1818} [2023-08-24 08:59:06,216 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 512 predicate places. [2023-08-24 08:59:06,216 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 1818 transitions, 49109 flow [2023-08-24 08:59:06,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 61.0) internal successors, (1037), 17 states have internal predecessors, (1037), 0 states have call successors, (0), 0 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 08:59:06,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:59:06,216 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:59:06,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-24 08:59:06,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-24 08:59:06,420 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:59:06,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:59:06,421 INFO L85 PathProgramCache]: Analyzing trace with hash -2049760665, now seen corresponding path program 25 times [2023-08-24 08:59:06,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:59:06,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71192598] [2023-08-24 08:59:06,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:59:06,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:59:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:59:06,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:59:06,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:59:06,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71192598] [2023-08-24 08:59:06,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71192598] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:59:06,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707904427] [2023-08-24 08:59:06,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:59:06,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:59:06,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:59:06,546 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:59:06,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-24 08:59:06,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:59:06,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-24 08:59:06,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:59:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:59:06,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:59:06,750 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:59:06,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707904427] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:59:06,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:59:06,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2023-08-24 08:59:06,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274706596] [2023-08-24 08:59:06,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:59:06,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 08:59:06,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:59:06,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 08:59:06,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2023-08-24 08:59:06,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 08:59:06,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 1818 transitions, 49109 flow. Second operand has 19 states, 19 states have (on average 61.63157894736842) internal successors, (1171), 19 states have internal predecessors, (1171), 0 states have call successors, (0), 0 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 08:59:06,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:59:06,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 08:59:06,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:59:12,712 INFO L124 PetriNetUnfolderBase]: 7503/11966 cut-off events. [2023-08-24 08:59:12,712 INFO L125 PetriNetUnfolderBase]: For 386201/386201 co-relation queries the response was YES. [2023-08-24 08:59:12,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156225 conditions, 11966 events. 7503/11966 cut-off events. For 386201/386201 co-relation queries the response was YES. Maximal size of possible extension queue 859. Compared 81948 event pairs, 111 based on Foata normal form. 48/12014 useless extension candidates. Maximal degree in co-relation 155546. Up to 4783 conditions per place. [2023-08-24 08:59:12,874 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 1716 selfloop transitions, 1362 changer transitions 16/3094 dead transitions. [2023-08-24 08:59:12,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 3094 transitions, 88269 flow [2023-08-24 08:59:12,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-24 08:59:12,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-24 08:59:12,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2018 transitions. [2023-08-24 08:59:12,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4339784946236559 [2023-08-24 08:59:12,876 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2018 transitions. [2023-08-24 08:59:12,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2018 transitions. [2023-08-24 08:59:12,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:59:12,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2018 transitions. [2023-08-24 08:59:12,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 65.09677419354838) internal successors, (2018), 31 states have internal predecessors, (2018), 0 states have call successors, (0), 0 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 08:59:12,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 150.0) internal successors, (4800), 32 states have internal predecessors, (4800), 0 states have call successors, (0), 0 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 08:59:12,880 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 150.0) internal successors, (4800), 32 states have internal predecessors, (4800), 0 states have call successors, (0), 0 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 08:59:12,880 INFO L175 Difference]: Start difference. First operand has 532 places, 1818 transitions, 49109 flow. Second operand 31 states and 2018 transitions. [2023-08-24 08:59:12,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 3094 transitions, 88269 flow [2023-08-24 08:59:20,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 3094 transitions, 87049 flow, removed 603 selfloop flow, removed 3 redundant places. [2023-08-24 08:59:20,283 INFO L231 Difference]: Finished difference. Result has 569 places, 2576 transitions, 72610 flow [2023-08-24 08:59:20,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=48314, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=715, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1009, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=72610, PETRI_PLACES=569, PETRI_TRANSITIONS=2576} [2023-08-24 08:59:20,284 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 549 predicate places. [2023-08-24 08:59:20,285 INFO L495 AbstractCegarLoop]: Abstraction has has 569 places, 2576 transitions, 72610 flow [2023-08-24 08:59:20,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 61.63157894736842) internal successors, (1171), 19 states have internal predecessors, (1171), 0 states have call successors, (0), 0 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 08:59:20,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:59:20,285 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:59:20,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-24 08:59:20,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-24 08:59:20,489 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:59:20,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:59:20,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1707325383, now seen corresponding path program 26 times [2023-08-24 08:59:20,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:59:20,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881040925] [2023-08-24 08:59:20,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:59:20,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:59:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:59:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:59:20,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:59:20,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881040925] [2023-08-24 08:59:20,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881040925] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:59:20,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869268931] [2023-08-24 08:59:20,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:59:20,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:59:20,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:59:20,608 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:59:20,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-24 08:59:20,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:59:20,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:59:20,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-24 08:59:20,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:59:20,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:59:20,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:59:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:59:20,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869268931] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:59:20,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:59:20,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-08-24 08:59:20,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281685095] [2023-08-24 08:59:20,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:59:20,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 08:59:20,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:59:20,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 08:59:20,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2023-08-24 08:59:20,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 08:59:20,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 2576 transitions, 72610 flow. Second operand has 23 states, 23 states have (on average 61.47826086956522) internal successors, (1414), 23 states have internal predecessors, (1414), 0 states have call successors, (0), 0 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 08:59:20,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:59:20,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 08:59:20,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:59:51,849 INFO L124 PetriNetUnfolderBase]: 8163/12888 cut-off events. [2023-08-24 08:59:51,849 INFO L125 PetriNetUnfolderBase]: For 403874/403874 co-relation queries the response was YES. [2023-08-24 08:59:52,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171409 conditions, 12888 events. 8163/12888 cut-off events. For 403874/403874 co-relation queries the response was YES. Maximal size of possible extension queue 893. Compared 88443 event pairs, 535 based on Foata normal form. 68/12956 useless extension candidates. Maximal degree in co-relation 170755. Up to 5473 conditions per place. [2023-08-24 08:59:52,144 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 755 selfloop transitions, 2746 changer transitions 63/3564 dead transitions. [2023-08-24 08:59:52,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 638 places, 3564 transitions, 105310 flow [2023-08-24 08:59:52,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-08-24 08:59:52,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2023-08-24 08:59:52,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 4513 transitions. [2023-08-24 08:59:52,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298095238095238 [2023-08-24 08:59:52,148 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 4513 transitions. [2023-08-24 08:59:52,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 4513 transitions. [2023-08-24 08:59:52,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:59:52,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 4513 transitions. [2023-08-24 08:59:52,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 64.47142857142858) internal successors, (4513), 70 states have internal predecessors, (4513), 0 states have call successors, (0), 0 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 08:59:52,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 150.0) internal successors, (10650), 71 states have internal predecessors, (10650), 0 states have call successors, (0), 0 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 08:59:52,172 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 150.0) internal successors, (10650), 71 states have internal predecessors, (10650), 0 states have call successors, (0), 0 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 08:59:52,172 INFO L175 Difference]: Start difference. First operand has 569 places, 2576 transitions, 72610 flow. Second operand 70 states and 4513 transitions. [2023-08-24 08:59:52,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 638 places, 3564 transitions, 105310 flow [2023-08-24 09:00:00,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 626 places, 3564 transitions, 103491 flow, removed 777 selfloop flow, removed 12 redundant places. [2023-08-24 09:00:00,721 INFO L231 Difference]: Finished difference. Result has 633 places, 3314 transitions, 98935 flow [2023-08-24 09:00:00,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=71047, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2020, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=98935, PETRI_PLACES=633, PETRI_TRANSITIONS=3314} [2023-08-24 09:00:00,722 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 613 predicate places. [2023-08-24 09:00:00,722 INFO L495 AbstractCegarLoop]: Abstraction has has 633 places, 3314 transitions, 98935 flow [2023-08-24 09:00:00,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 61.47826086956522) internal successors, (1414), 23 states have internal predecessors, (1414), 0 states have call successors, (0), 0 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 09:00:00,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:00:00,723 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:00:00,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-08-24 09:00:00,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:00:00,927 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:00:00,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:00:00,927 INFO L85 PathProgramCache]: Analyzing trace with hash 344362709, now seen corresponding path program 27 times [2023-08-24 09:00:00,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:00:00,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626446918] [2023-08-24 09:00:00,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:00:00,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:00:00,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:00:01,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:00:01,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:00:01,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626446918] [2023-08-24 09:00:01,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626446918] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:00:01,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551111862] [2023-08-24 09:00:01,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:00:01,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:00:01,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:00:01,058 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:00:01,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-24 09:00:01,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 09:00:01,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:00:01,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-24 09:00:01,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:00:01,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:00:01,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:00:01,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:00:01,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551111862] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:00:01,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:00:01,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-08-24 09:00:01,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18927339] [2023-08-24 09:00:01,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:00:01,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 09:00:01,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:00:01,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 09:00:01,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-08-24 09:00:01,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 09:00:01,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 633 places, 3314 transitions, 98935 flow. Second operand has 21 states, 21 states have (on average 61.714285714285715) internal successors, (1296), 21 states have internal predecessors, (1296), 0 states have call successors, (0), 0 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 09:00:01,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:00:01,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 09:00:01,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:00:27,859 INFO L124 PetriNetUnfolderBase]: 8469/13374 cut-off events. [2023-08-24 09:00:27,859 INFO L125 PetriNetUnfolderBase]: For 400241/400241 co-relation queries the response was YES. [2023-08-24 09:00:28,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182868 conditions, 13374 events. 8469/13374 cut-off events. For 400241/400241 co-relation queries the response was YES. Maximal size of possible extension queue 940. Compared 91810 event pairs, 405 based on Foata normal form. 78/13452 useless extension candidates. Maximal degree in co-relation 182113. Up to 4307 conditions per place. [2023-08-24 09:00:28,170 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 1781 selfloop transitions, 1962 changer transitions 33/3776 dead transitions. [2023-08-24 09:00:28,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 707 places, 3776 transitions, 115968 flow [2023-08-24 09:00:28,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-08-24 09:00:28,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-08-24 09:00:28,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 4896 transitions. [2023-08-24 09:00:28,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42947368421052634 [2023-08-24 09:00:28,176 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 4896 transitions. [2023-08-24 09:00:28,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 4896 transitions. [2023-08-24 09:00:28,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:00:28,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 4896 transitions. [2023-08-24 09:00:28,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 64.42105263157895) internal successors, (4896), 76 states have internal predecessors, (4896), 0 states have call successors, (0), 0 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 09:00:28,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 150.0) internal successors, (11550), 77 states have internal predecessors, (11550), 0 states have call successors, (0), 0 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 09:00:28,185 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 150.0) internal successors, (11550), 77 states have internal predecessors, (11550), 0 states have call successors, (0), 0 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 09:00:28,185 INFO L175 Difference]: Start difference. First operand has 633 places, 3314 transitions, 98935 flow. Second operand 76 states and 4896 transitions. [2023-08-24 09:00:28,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 707 places, 3776 transitions, 115968 flow [2023-08-24 09:00:39,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 678 places, 3776 transitions, 107412 flow, removed 3091 selfloop flow, removed 29 redundant places. [2023-08-24 09:00:39,561 INFO L231 Difference]: Finished difference. Result has 696 places, 3491 transitions, 101319 flow [2023-08-24 09:00:39,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=91281, PETRI_DIFFERENCE_MINUEND_PLACES=603, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1776, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=101319, PETRI_PLACES=696, PETRI_TRANSITIONS=3491} [2023-08-24 09:00:39,563 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 676 predicate places. [2023-08-24 09:00:39,563 INFO L495 AbstractCegarLoop]: Abstraction has has 696 places, 3491 transitions, 101319 flow [2023-08-24 09:00:39,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 61.714285714285715) internal successors, (1296), 21 states have internal predecessors, (1296), 0 states have call successors, (0), 0 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 09:00:39,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:00:39,564 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:00:39,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-24 09:00:39,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:00:39,768 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:00:39,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:00:39,769 INFO L85 PathProgramCache]: Analyzing trace with hash 2000459135, now seen corresponding path program 28 times [2023-08-24 09:00:39,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:00:39,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063658026] [2023-08-24 09:00:39,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:00:39,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:00:39,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:00:39,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:00:39,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:00:39,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063658026] [2023-08-24 09:00:39,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063658026] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:00:39,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656665828] [2023-08-24 09:00:39,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:00:39,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:00:39,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:00:39,914 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:00:39,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-24 09:00:39,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:00:39,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:00:39,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-24 09:00:39,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:00:40,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:00:40,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:00:40,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:00:40,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656665828] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:00:40,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:00:40,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2023-08-24 09:00:40,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034478494] [2023-08-24 09:00:40,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:00:40,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 09:00:40,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:00:40,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 09:00:40,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-08-24 09:00:40,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 09:00:40,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 696 places, 3491 transitions, 101319 flow. Second operand has 20 states, 20 states have (on average 61.75) internal successors, (1235), 20 states have internal predecessors, (1235), 0 states have call successors, (0), 0 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 09:00:40,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:00:40,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 09:00:40,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:00:51,985 INFO L124 PetriNetUnfolderBase]: 8819/13946 cut-off events. [2023-08-24 09:00:51,985 INFO L125 PetriNetUnfolderBase]: For 358683/358683 co-relation queries the response was YES. [2023-08-24 09:00:52,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179520 conditions, 13946 events. 8819/13946 cut-off events. For 358683/358683 co-relation queries the response was YES. Maximal size of possible extension queue 977. Compared 96543 event pairs, 512 based on Foata normal form. 58/14000 useless extension candidates. Maximal degree in co-relation 178897. Up to 5144 conditions per place. [2023-08-24 09:00:52,188 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 2093 selfloop transitions, 1822 changer transitions 0/3915 dead transitions. [2023-08-24 09:00:52,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 758 places, 3915 transitions, 117678 flow [2023-08-24 09:00:52,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-08-24 09:00:52,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-08-24 09:00:52,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 4068 transitions. [2023-08-24 09:00:52,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43047619047619046 [2023-08-24 09:00:52,191 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 4068 transitions. [2023-08-24 09:00:52,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 4068 transitions. [2023-08-24 09:00:52,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:00:52,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 4068 transitions. [2023-08-24 09:00:52,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 64.57142857142857) internal successors, (4068), 63 states have internal predecessors, (4068), 0 states have call successors, (0), 0 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 09:00:52,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 150.0) internal successors, (9600), 64 states have internal predecessors, (9600), 0 states have call successors, (0), 0 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 09:00:52,200 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 150.0) internal successors, (9600), 64 states have internal predecessors, (9600), 0 states have call successors, (0), 0 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 09:00:52,200 INFO L175 Difference]: Start difference. First operand has 696 places, 3491 transitions, 101319 flow. Second operand 63 states and 4068 transitions. [2023-08-24 09:00:52,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 758 places, 3915 transitions, 117678 flow [2023-08-24 09:01:03,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 735 places, 3915 transitions, 115200 flow, removed 1019 selfloop flow, removed 23 redundant places. [2023-08-24 09:01:03,207 INFO L231 Difference]: Finished difference. Result has 745 places, 3667 transitions, 108313 flow [2023-08-24 09:01:03,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=99210, PETRI_DIFFERENCE_MINUEND_PLACES=673, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1665, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1781, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=108313, PETRI_PLACES=745, PETRI_TRANSITIONS=3667} [2023-08-24 09:01:03,209 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 725 predicate places. [2023-08-24 09:01:03,209 INFO L495 AbstractCegarLoop]: Abstraction has has 745 places, 3667 transitions, 108313 flow [2023-08-24 09:01:03,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 61.75) internal successors, (1235), 20 states have internal predecessors, (1235), 0 states have call successors, (0), 0 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 09:01:03,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:01:03,210 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:01:03,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-24 09:01:03,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-24 09:01:03,414 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:01:03,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:01:03,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1357875537, now seen corresponding path program 29 times [2023-08-24 09:01:03,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:01:03,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748350449] [2023-08-24 09:01:03,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:01:03,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:01:03,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:01:03,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:01:03,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:01:03,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748350449] [2023-08-24 09:01:03,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748350449] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:01:03,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120036090] [2023-08-24 09:01:03,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:01:03,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:01:03,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:01:03,541 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:01:03,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-24 09:01:03,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 09:01:03,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:01:03,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-24 09:01:03,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:01:03,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:01:03,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:01:03,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:01:03,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120036090] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:01:03,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:01:03,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-08-24 09:01:03,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698100303] [2023-08-24 09:01:03,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:01:03,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 09:01:03,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:01:03,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 09:01:03,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2023-08-24 09:01:03,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 09:01:03,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 745 places, 3667 transitions, 108313 flow. Second operand has 22 states, 22 states have (on average 61.68181818181818) internal successors, (1357), 22 states have internal predecessors, (1357), 0 states have call successors, (0), 0 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 09:01:03,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:01:03,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 09:01:03,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:01:23,379 INFO L124 PetriNetUnfolderBase]: 10396/16309 cut-off events. [2023-08-24 09:01:23,379 INFO L125 PetriNetUnfolderBase]: For 443892/443892 co-relation queries the response was YES. [2023-08-24 09:01:23,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214008 conditions, 16309 events. 10396/16309 cut-off events. For 443892/443892 co-relation queries the response was YES. Maximal size of possible extension queue 1103. Compared 113712 event pairs, 333 based on Foata normal form. 258/16567 useless extension candidates. Maximal degree in co-relation 213433. Up to 4983 conditions per place. [2023-08-24 09:01:23,634 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 1368 selfloop transitions, 3237 changer transitions 76/4681 dead transitions. [2023-08-24 09:01:23,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 825 places, 4681 transitions, 143391 flow [2023-08-24 09:01:23,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-08-24 09:01:23,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2023-08-24 09:01:23,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 5223 transitions. [2023-08-24 09:01:23,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42987654320987656 [2023-08-24 09:01:23,639 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 5223 transitions. [2023-08-24 09:01:23,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 5223 transitions. [2023-08-24 09:01:23,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:01:23,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 5223 transitions. [2023-08-24 09:01:23,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 64.48148148148148) internal successors, (5223), 81 states have internal predecessors, (5223), 0 states have call successors, (0), 0 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 09:01:23,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 150.0) internal successors, (12300), 82 states have internal predecessors, (12300), 0 states have call successors, (0), 0 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 09:01:23,650 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 150.0) internal successors, (12300), 82 states have internal predecessors, (12300), 0 states have call successors, (0), 0 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 09:01:23,650 INFO L175 Difference]: Start difference. First operand has 745 places, 3667 transitions, 108313 flow. Second operand 81 states and 5223 transitions. [2023-08-24 09:01:23,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 825 places, 4681 transitions, 143391 flow [2023-08-24 09:01:39,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 807 places, 4681 transitions, 142059 flow, removed 524 selfloop flow, removed 18 redundant places. [2023-08-24 09:01:39,383 INFO L231 Difference]: Finished difference. Result has 837 places, 4357 transitions, 137170 flow [2023-08-24 09:01:39,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=106400, PETRI_DIFFERENCE_MINUEND_PLACES=727, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2569, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1034, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=137170, PETRI_PLACES=837, PETRI_TRANSITIONS=4357} [2023-08-24 09:01:39,385 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 817 predicate places. [2023-08-24 09:01:39,386 INFO L495 AbstractCegarLoop]: Abstraction has has 837 places, 4357 transitions, 137170 flow [2023-08-24 09:01:39,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 61.68181818181818) internal successors, (1357), 22 states have internal predecessors, (1357), 0 states have call successors, (0), 0 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 09:01:39,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:01:39,386 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:01:39,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-08-24 09:01:39,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:01:39,590 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:01:39,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:01:39,590 INFO L85 PathProgramCache]: Analyzing trace with hash -924233609, now seen corresponding path program 30 times [2023-08-24 09:01:39,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:01:39,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479310535] [2023-08-24 09:01:39,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:01:39,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:01:39,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:01:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:01:39,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:01:39,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479310535] [2023-08-24 09:01:39,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479310535] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:01:39,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330564907] [2023-08-24 09:01:39,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:01:39,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:01:39,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:01:39,713 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:01:39,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-24 09:01:39,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 09:01:39,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:01:39,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-24 09:01:39,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:01:39,859 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:01:39,860 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:01:40,000 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:01:40,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330564907] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:01:40,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:01:40,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-08-24 09:01:40,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454674675] [2023-08-24 09:01:40,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:01:40,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 09:01:40,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:01:40,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 09:01:40,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2023-08-24 09:01:40,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 09:01:40,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 837 places, 4357 transitions, 137170 flow. Second operand has 23 states, 23 states have (on average 61.47826086956522) internal successors, (1414), 23 states have internal predecessors, (1414), 0 states have call successors, (0), 0 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 09:01:40,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:01:40,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 09:01:40,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:02:27,566 INFO L124 PetriNetUnfolderBase]: 10962/17229 cut-off events. [2023-08-24 09:02:27,566 INFO L125 PetriNetUnfolderBase]: For 533759/533759 co-relation queries the response was YES. [2023-08-24 09:02:27,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239475 conditions, 17229 events. 10962/17229 cut-off events. For 533759/533759 co-relation queries the response was YES. Maximal size of possible extension queue 1135. Compared 121438 event pairs, 324 based on Foata normal form. 116/17345 useless extension candidates. Maximal degree in co-relation 238845. Up to 5433 conditions per place. [2023-08-24 09:02:27,835 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 625 selfloop transitions, 4302 changer transitions 13/4940 dead transitions. [2023-08-24 09:02:27,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 931 places, 4940 transitions, 159922 flow [2023-08-24 09:02:27,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-08-24 09:02:27,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2023-08-24 09:02:27,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 6131 transitions. [2023-08-24 09:02:27,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4302456140350877 [2023-08-24 09:02:27,839 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 6131 transitions. [2023-08-24 09:02:27,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 6131 transitions. [2023-08-24 09:02:27,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:02:27,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 6131 transitions. [2023-08-24 09:02:27,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 64.53684210526316) internal successors, (6131), 95 states have internal predecessors, (6131), 0 states have call successors, (0), 0 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 09:02:27,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 150.0) internal successors, (14400), 96 states have internal predecessors, (14400), 0 states have call successors, (0), 0 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 09:02:27,850 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 150.0) internal successors, (14400), 96 states have internal predecessors, (14400), 0 states have call successors, (0), 0 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 09:02:27,850 INFO L175 Difference]: Start difference. First operand has 837 places, 4357 transitions, 137170 flow. Second operand 95 states and 6131 transitions. [2023-08-24 09:02:27,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 931 places, 4940 transitions, 159922 flow [2023-08-24 09:02:48,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 904 places, 4940 transitions, 154705 flow, removed 2444 selfloop flow, removed 27 redundant places. [2023-08-24 09:02:49,007 INFO L231 Difference]: Finished difference. Result has 908 places, 4706 transitions, 152165 flow [2023-08-24 09:02:49,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=132019, PETRI_DIFFERENCE_MINUEND_PLACES=810, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3946, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=152165, PETRI_PLACES=908, PETRI_TRANSITIONS=4706} [2023-08-24 09:02:49,010 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 888 predicate places. [2023-08-24 09:02:49,010 INFO L495 AbstractCegarLoop]: Abstraction has has 908 places, 4706 transitions, 152165 flow [2023-08-24 09:02:49,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 61.47826086956522) internal successors, (1414), 23 states have internal predecessors, (1414), 0 states have call successors, (0), 0 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 09:02:49,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:02:49,010 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:02:49,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-24 09:02:49,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:02:49,210 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:02:49,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:02:49,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1203538339, now seen corresponding path program 31 times [2023-08-24 09:02:49,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:02:49,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13884930] [2023-08-24 09:02:49,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:02:49,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:02:49,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:02:49,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:02:49,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:02:49,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13884930] [2023-08-24 09:02:49,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13884930] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:02:49,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359268759] [2023-08-24 09:02:49,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:02:49,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:02:49,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:02:49,316 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:02:49,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-24 09:02:49,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:02:49,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-24 09:02:49,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:02:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:02:49,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:02:49,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:02:49,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359268759] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:02:49,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:02:49,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 22 [2023-08-24 09:02:49,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991618200] [2023-08-24 09:02:49,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:02:49,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 09:02:49,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:02:49,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 09:02:49,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-08-24 09:02:49,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 09:02:49,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 908 places, 4706 transitions, 152165 flow. Second operand has 22 states, 22 states have (on average 61.54545454545455) internal successors, (1354), 22 states have internal predecessors, (1354), 0 states have call successors, (0), 0 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 09:02:49,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:02:49,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 09:02:49,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:02:52,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:03:16,652 INFO L124 PetriNetUnfolderBase]: 13343/21258 cut-off events. [2023-08-24 09:03:16,652 INFO L125 PetriNetUnfolderBase]: For 785552/785552 co-relation queries the response was YES. [2023-08-24 09:03:16,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304210 conditions, 21258 events. 13343/21258 cut-off events. For 785552/785552 co-relation queries the response was YES. Maximal size of possible extension queue 1420. Compared 158923 event pairs, 1497 based on Foata normal form. 200/21458 useless extension candidates. Maximal degree in co-relation 303545. Up to 11817 conditions per place. [2023-08-24 09:03:17,008 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 3152 selfloop transitions, 2636 changer transitions 105/5893 dead transitions. [2023-08-24 09:03:17,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 974 places, 5893 transitions, 202350 flow [2023-08-24 09:03:17,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-08-24 09:03:17,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-08-24 09:03:17,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 4295 transitions. [2023-08-24 09:03:17,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.427363184079602 [2023-08-24 09:03:17,011 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 4295 transitions. [2023-08-24 09:03:17,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 4295 transitions. [2023-08-24 09:03:17,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:03:17,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 4295 transitions. [2023-08-24 09:03:17,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 64.1044776119403) internal successors, (4295), 67 states have internal predecessors, (4295), 0 states have call successors, (0), 0 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 09:03:17,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 150.0) internal successors, (10200), 68 states have internal predecessors, (10200), 0 states have call successors, (0), 0 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 09:03:17,019 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 150.0) internal successors, (10200), 68 states have internal predecessors, (10200), 0 states have call successors, (0), 0 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 09:03:17,019 INFO L175 Difference]: Start difference. First operand has 908 places, 4706 transitions, 152165 flow. Second operand 67 states and 4295 transitions. [2023-08-24 09:03:17,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 974 places, 5893 transitions, 202350 flow [2023-08-24 09:03:52,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 930 places, 5893 transitions, 199182 flow, removed 1044 selfloop flow, removed 44 redundant places. [2023-08-24 09:03:52,931 INFO L231 Difference]: Finished difference. Result has 949 places, 5422 transitions, 184157 flow [2023-08-24 09:03:52,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=148236, PETRI_DIFFERENCE_MINUEND_PLACES=864, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1937, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=184157, PETRI_PLACES=949, PETRI_TRANSITIONS=5422} [2023-08-24 09:03:52,934 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 929 predicate places. [2023-08-24 09:03:52,934 INFO L495 AbstractCegarLoop]: Abstraction has has 949 places, 5422 transitions, 184157 flow [2023-08-24 09:03:52,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 61.54545454545455) internal successors, (1354), 22 states have internal predecessors, (1354), 0 states have call successors, (0), 0 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 09:03:52,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:03:52,934 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:03:52,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-24 09:03:53,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-24 09:03:53,135 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:03:53,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:03:53,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1616612829, now seen corresponding path program 32 times [2023-08-24 09:03:53,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:03:53,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763020604] [2023-08-24 09:03:53,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:03:53,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:03:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:03:53,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:03:53,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:03:53,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763020604] [2023-08-24 09:03:53,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763020604] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:03:53,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585268880] [2023-08-24 09:03:53,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:03:53,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:03:53,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:03:53,265 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:03:53,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-24 09:03:53,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:03:53,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:03:53,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-24 09:03:53,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:03:53,403 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:03:53,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:03:53,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:03:53,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585268880] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:03:53,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:03:53,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2023-08-24 09:03:53,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387014425] [2023-08-24 09:03:53,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:03:53,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 09:03:53,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:03:53,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 09:03:53,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-08-24 09:03:53,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 09:03:53,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 949 places, 5422 transitions, 184157 flow. Second operand has 20 states, 20 states have (on average 61.75) internal successors, (1235), 20 states have internal predecessors, (1235), 0 states have call successors, (0), 0 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 09:03:53,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:03:53,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 09:03:53,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:03:58,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:04:24,626 INFO L124 PetriNetUnfolderBase]: 14333/22956 cut-off events. [2023-08-24 09:04:24,626 INFO L125 PetriNetUnfolderBase]: For 891604/891604 co-relation queries the response was YES. [2023-08-24 09:04:24,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338335 conditions, 22956 events. 14333/22956 cut-off events. For 891604/891604 co-relation queries the response was YES. Maximal size of possible extension queue 1536. Compared 175025 event pairs, 2584 based on Foata normal form. 30/22986 useless extension candidates. Maximal degree in co-relation 337679. Up to 17686 conditions per place. [2023-08-24 09:04:25,040 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 4902 selfloop transitions, 1291 changer transitions 2/6195 dead transitions. [2023-08-24 09:04:25,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1034 places, 6195 transitions, 218072 flow [2023-08-24 09:04:25,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-08-24 09:04:25,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2023-08-24 09:04:25,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 5551 transitions. [2023-08-24 09:04:25,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43031007751937983 [2023-08-24 09:04:25,044 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 5551 transitions. [2023-08-24 09:04:25,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 5551 transitions. [2023-08-24 09:04:25,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:04:25,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 5551 transitions. [2023-08-24 09:04:25,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 64.54651162790698) internal successors, (5551), 86 states have internal predecessors, (5551), 0 states have call successors, (0), 0 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 09:04:25,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 150.0) internal successors, (13050), 87 states have internal predecessors, (13050), 0 states have call successors, (0), 0 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 09:04:25,054 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 150.0) internal successors, (13050), 87 states have internal predecessors, (13050), 0 states have call successors, (0), 0 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 09:04:25,054 INFO L175 Difference]: Start difference. First operand has 949 places, 5422 transitions, 184157 flow. Second operand 86 states and 5551 transitions. [2023-08-24 09:04:25,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1034 places, 6195 transitions, 218072 flow [2023-08-24 09:05:10,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1005 places, 6195 transitions, 215639 flow, removed 906 selfloop flow, removed 29 redundant places. [2023-08-24 09:05:10,847 INFO L231 Difference]: Finished difference. Result has 1020 places, 5735 transitions, 196142 flow [2023-08-24 09:05:10,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=181741, PETRI_DIFFERENCE_MINUEND_PLACES=920, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1020, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=196142, PETRI_PLACES=1020, PETRI_TRANSITIONS=5735} [2023-08-24 09:05:10,850 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 1000 predicate places. [2023-08-24 09:05:10,851 INFO L495 AbstractCegarLoop]: Abstraction has has 1020 places, 5735 transitions, 196142 flow [2023-08-24 09:05:10,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 61.75) internal successors, (1235), 20 states have internal predecessors, (1235), 0 states have call successors, (0), 0 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 09:05:10,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:05:10,851 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:05:10,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-24 09:05:11,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-24 09:05:11,055 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:05:11,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:05:11,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1032205823, now seen corresponding path program 33 times [2023-08-24 09:05:11,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:05:11,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95301595] [2023-08-24 09:05:11,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:05:11,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:05:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:05:11,175 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:05:11,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:05:11,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95301595] [2023-08-24 09:05:11,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95301595] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:05:11,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32611868] [2023-08-24 09:05:11,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:05:11,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:05:11,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:05:11,177 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:05:11,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-24 09:05:11,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 09:05:11,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:05:11,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-24 09:05:11,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:05:11,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:05:11,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:05:11,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:05:11,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32611868] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:05:11,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:05:11,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-08-24 09:05:11,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168644401] [2023-08-24 09:05:11,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:05:11,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 09:05:11,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:05:11,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 09:05:11,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-08-24 09:05:11,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 09:05:11,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1020 places, 5735 transitions, 196142 flow. Second operand has 22 states, 22 states have (on average 61.68181818181818) internal successors, (1357), 22 states have internal predecessors, (1357), 0 states have call successors, (0), 0 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 09:05:11,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:05:11,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 09:05:11,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:05:53,465 INFO L124 PetriNetUnfolderBase]: 15493/24886 cut-off events. [2023-08-24 09:05:53,466 INFO L125 PetriNetUnfolderBase]: For 1012054/1012054 co-relation queries the response was YES. [2023-08-24 09:05:53,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370597 conditions, 24886 events. 15493/24886 cut-off events. For 1012054/1012054 co-relation queries the response was YES. Maximal size of possible extension queue 1653. Compared 192836 event pairs, 2419 based on Foata normal form. 68/24954 useless extension candidates. Maximal degree in co-relation 369915. Up to 17527 conditions per place. [2023-08-24 09:05:54,057 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 4727 selfloop transitions, 1823 changer transitions 37/6587 dead transitions. [2023-08-24 09:05:54,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1107 places, 6587 transitions, 235468 flow [2023-08-24 09:05:54,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-08-24 09:05:54,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2023-08-24 09:05:54,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 5656 transitions. [2023-08-24 09:05:54,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42848484848484847 [2023-08-24 09:05:54,061 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 5656 transitions. [2023-08-24 09:05:54,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 5656 transitions. [2023-08-24 09:05:54,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:05:54,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 5656 transitions. [2023-08-24 09:05:54,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 64.27272727272727) internal successors, (5656), 88 states have internal predecessors, (5656), 0 states have call successors, (0), 0 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 09:05:54,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 150.0) internal successors, (13350), 89 states have internal predecessors, (13350), 0 states have call successors, (0), 0 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 09:05:54,070 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 150.0) internal successors, (13350), 89 states have internal predecessors, (13350), 0 states have call successors, (0), 0 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 09:05:54,070 INFO L175 Difference]: Start difference. First operand has 1020 places, 5735 transitions, 196142 flow. Second operand 88 states and 5656 transitions. [2023-08-24 09:05:54,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1107 places, 6587 transitions, 235468 flow [2023-08-24 09:06:51,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1085 places, 6587 transitions, 233997 flow, removed 658 selfloop flow, removed 22 redundant places. [2023-08-24 09:06:51,671 INFO L231 Difference]: Finished difference. Result has 1103 places, 6044 transitions, 211908 flow [2023-08-24 09:06:51,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=194653, PETRI_DIFFERENCE_MINUEND_PLACES=998, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1522, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4055, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=211908, PETRI_PLACES=1103, PETRI_TRANSITIONS=6044} [2023-08-24 09:06:51,675 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 1083 predicate places. [2023-08-24 09:06:51,675 INFO L495 AbstractCegarLoop]: Abstraction has has 1103 places, 6044 transitions, 211908 flow [2023-08-24 09:06:51,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 61.68181818181818) internal successors, (1357), 22 states have internal predecessors, (1357), 0 states have call successors, (0), 0 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 09:06:51,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:06:51,676 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:06:51,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-24 09:06:51,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-24 09:06:51,880 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:06:51,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:06:51,881 INFO L85 PathProgramCache]: Analyzing trace with hash -756157355, now seen corresponding path program 34 times [2023-08-24 09:06:51,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:06:51,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955826062] [2023-08-24 09:06:51,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:06:51,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:06:51,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:06:52,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:06:52,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:06:52,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955826062] [2023-08-24 09:06:52,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955826062] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:06:52,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773507813] [2023-08-24 09:06:52,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:06:52,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:06:52,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:06:52,015 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:06:52,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-24 09:06:52,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:06:52,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:06:52,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-24 09:06:52,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:06:52,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:06:52,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:06:52,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:06:52,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773507813] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:06:52,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:06:52,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-08-24 09:06:52,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132590788] [2023-08-24 09:06:52,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:06:52,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 09:06:52,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:06:52,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 09:06:52,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2023-08-24 09:06:52,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 09:06:52,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1103 places, 6044 transitions, 211908 flow. Second operand has 23 states, 23 states have (on average 61.65217391304348) internal successors, (1418), 23 states have internal predecessors, (1418), 0 states have call successors, (0), 0 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 09:06:52,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:06:52,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 09:06:52,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:07:35,526 INFO L124 PetriNetUnfolderBase]: 17475/28296 cut-off events. [2023-08-24 09:07:35,526 INFO L125 PetriNetUnfolderBase]: For 1252377/1252377 co-relation queries the response was YES. [2023-08-24 09:07:35,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432668 conditions, 28296 events. 17475/28296 cut-off events. For 1252377/1252377 co-relation queries the response was YES. Maximal size of possible extension queue 1833. Compared 223598 event pairs, 2649 based on Foata normal form. 176/28472 useless extension candidates. Maximal degree in co-relation 431955. Up to 18051 conditions per place. [2023-08-24 09:07:36,162 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 4788 selfloop transitions, 2188 changer transitions 137/7113 dead transitions. [2023-08-24 09:07:36,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1177 places, 7113 transitions, 262893 flow [2023-08-24 09:07:36,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-08-24 09:07:36,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-08-24 09:07:36,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 4814 transitions. [2023-08-24 09:07:36,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42791111111111113 [2023-08-24 09:07:36,165 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 4814 transitions. [2023-08-24 09:07:36,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 4814 transitions. [2023-08-24 09:07:36,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:07:36,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 4814 transitions. [2023-08-24 09:07:36,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 64.18666666666667) internal successors, (4814), 75 states have internal predecessors, (4814), 0 states have call successors, (0), 0 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 09:07:36,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 150.0) internal successors, (11400), 76 states have internal predecessors, (11400), 0 states have call successors, (0), 0 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 09:07:36,173 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 150.0) internal successors, (11400), 76 states have internal predecessors, (11400), 0 states have call successors, (0), 0 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 09:07:36,173 INFO L175 Difference]: Start difference. First operand has 1103 places, 6044 transitions, 211908 flow. Second operand 75 states and 4814 transitions. [2023-08-24 09:07:36,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1177 places, 7113 transitions, 262893 flow [2023-08-24 09:08:56,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1142 places, 7113 transitions, 260982 flow, removed 807 selfloop flow, removed 35 redundant places. [2023-08-24 09:08:56,342 INFO L231 Difference]: Finished difference. Result has 1171 places, 6530 transitions, 236917 flow [2023-08-24 09:08:56,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=209436, PETRI_DIFFERENCE_MINUEND_PLACES=1068, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6014, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1696, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=236917, PETRI_PLACES=1171, PETRI_TRANSITIONS=6530} [2023-08-24 09:08:56,346 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 1151 predicate places. [2023-08-24 09:08:56,346 INFO L495 AbstractCegarLoop]: Abstraction has has 1171 places, 6530 transitions, 236917 flow [2023-08-24 09:08:56,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 61.65217391304348) internal successors, (1418), 23 states have internal predecessors, (1418), 0 states have call successors, (0), 0 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 09:08:56,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:08:56,346 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:08:56,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-08-24 09:08:56,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:08:56,551 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:08:56,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:08:56,551 INFO L85 PathProgramCache]: Analyzing trace with hash -545241665, now seen corresponding path program 35 times [2023-08-24 09:08:56,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:08:56,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828632625] [2023-08-24 09:08:56,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:08:56,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:08:56,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:08:56,672 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:08:56,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:08:56,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828632625] [2023-08-24 09:08:56,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828632625] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:08:56,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479695441] [2023-08-24 09:08:56,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:08:56,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:08:56,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:08:56,673 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:08:56,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-24 09:08:56,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 09:08:56,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:08:56,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-24 09:08:56,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:08:56,820 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:08:56,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:08:56,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:08:56,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479695441] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:08:56,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:08:56,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2023-08-24 09:08:56,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796711641] [2023-08-24 09:08:56,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:08:56,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 09:08:56,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:08:56,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 09:08:56,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-08-24 09:08:56,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 09:08:56,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1171 places, 6530 transitions, 236917 flow. Second operand has 20 states, 20 states have (on average 61.75) internal successors, (1235), 20 states have internal predecessors, (1235), 0 states have call successors, (0), 0 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 09:08:56,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:08:56,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 09:08:56,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:09:46,143 INFO L124 PetriNetUnfolderBase]: 18456/30107 cut-off events. [2023-08-24 09:09:46,144 INFO L125 PetriNetUnfolderBase]: For 1409333/1409333 co-relation queries the response was YES. [2023-08-24 09:09:46,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473617 conditions, 30107 events. 18456/30107 cut-off events. For 1409333/1409333 co-relation queries the response was YES. Maximal size of possible extension queue 1991. Compared 242857 event pairs, 4103 based on Foata normal form. 58/30165 useless extension candidates. Maximal degree in co-relation 472879. Up to 25685 conditions per place. [2023-08-24 09:09:46,906 INFO L140 encePairwiseOnDemand]: 144/150 looper letters, 6375 selfloop transitions, 911 changer transitions 7/7293 dead transitions. [2023-08-24 09:09:46,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1239 places, 7293 transitions, 277427 flow [2023-08-24 09:09:46,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-08-24 09:09:46,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2023-08-24 09:09:46,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 4460 transitions. [2023-08-24 09:09:46,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43091787439613527 [2023-08-24 09:09:46,909 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 4460 transitions. [2023-08-24 09:09:46,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 4460 transitions. [2023-08-24 09:09:46,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:09:46,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 4460 transitions. [2023-08-24 09:09:46,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 64.6376811594203) internal successors, (4460), 69 states have internal predecessors, (4460), 0 states have call successors, (0), 0 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 09:09:46,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 150.0) internal successors, (10500), 70 states have internal predecessors, (10500), 0 states have call successors, (0), 0 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 09:09:46,917 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 150.0) internal successors, (10500), 70 states have internal predecessors, (10500), 0 states have call successors, (0), 0 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 09:09:46,917 INFO L175 Difference]: Start difference. First operand has 1171 places, 6530 transitions, 236917 flow. Second operand 69 states and 4460 transitions. [2023-08-24 09:09:46,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1239 places, 7293 transitions, 277427 flow [2023-08-24 09:11:24,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1212 places, 7293 transitions, 274103 flow, removed 1555 selfloop flow, removed 27 redundant places. [2023-08-24 09:11:24,973 INFO L231 Difference]: Finished difference. Result has 1237 places, 6896 transitions, 251904 flow [2023-08-24 09:11:24,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=233626, PETRI_DIFFERENCE_MINUEND_PLACES=1144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=590, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5790, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=251904, PETRI_PLACES=1237, PETRI_TRANSITIONS=6896} [2023-08-24 09:11:24,977 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 1217 predicate places. [2023-08-24 09:11:24,977 INFO L495 AbstractCegarLoop]: Abstraction has has 1237 places, 6896 transitions, 251904 flow [2023-08-24 09:11:24,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 61.75) internal successors, (1235), 20 states have internal predecessors, (1235), 0 states have call successors, (0), 0 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 09:11:24,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:11:24,978 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:11:24,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-24 09:11:25,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-24 09:11:25,182 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:11:25,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:11:25,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1038459051, now seen corresponding path program 36 times [2023-08-24 09:11:25,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:11:25,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127559686] [2023-08-24 09:11:25,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:11:25,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:11:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:11:25,307 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:11:25,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:11:25,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127559686] [2023-08-24 09:11:25,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127559686] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:11:25,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734737336] [2023-08-24 09:11:25,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:11:25,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:11:25,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:11:25,308 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:11:25,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-24 09:11:25,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 09:11:25,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:11:25,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-24 09:11:25,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:11:25,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:11:25,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:11:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:11:25,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734737336] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:11:25,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:11:25,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-08-24 09:11:25,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725884282] [2023-08-24 09:11:25,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:11:25,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 09:11:25,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:11:25,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 09:11:25,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-08-24 09:11:25,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 150 [2023-08-24 09:11:25,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1237 places, 6896 transitions, 251904 flow. Second operand has 21 states, 21 states have (on average 61.714285714285715) internal successors, (1296), 21 states have internal predecessors, (1296), 0 states have call successors, (0), 0 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 09:11:25,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:11:25,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 150 [2023-08-24 09:11:25,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:11:32,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] Received shutdown request... [2023-08-24 09:11:54,316 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 09:11:54,316 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 09:11:54,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-08-24 09:11:54,492 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 09:11:54,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-08-24 09:11:54,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-24 09:11:54,697 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (21states, 60/150 universal loopers) in iteration 40,while PetriNetUnfolder was constructing finite prefix that currently has 198504 conditions, 12622 events (7559/12621 cut-off events. For 639552/639552 co-relation queries the response was YES. Maximal size of possible extension queue 2046. Compared 107640 event pairs, 2257 based on Foata normal form. 15/14672 useless extension candidates. Maximal degree in co-relation 198193. Up to 10228 conditions per place.). [2023-08-24 09:11:54,698 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 09:11:54,698 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 09:11:54,698 INFO L445 BasicCegarLoop]: Path program histogram: [36, 3, 1] [2023-08-24 09:11:54,700 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 09:11:54,700 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 09:11:54,702 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 09:11:54 BasicIcfg [2023-08-24 09:11:54,702 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 09:11:54,702 INFO L158 Benchmark]: Toolchain (without parser) took 842871.75ms. Allocated memory was 390.1MB in the beginning and 6.2GB in the end (delta: 5.8GB). Free memory was 366.3MB in the beginning and 4.6GB in the end (delta: -4.2GB). Peak memory consumption was 5.9GB. Max. memory is 16.0GB. [2023-08-24 09:11:54,702 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 390.1MB. Free memory is still 366.5MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 09:11:54,702 INFO L158 Benchmark]: CACSL2BoogieTranslator took 154.79ms. Allocated memory is still 390.1MB. Free memory was 365.7MB in the beginning and 355.0MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-24 09:11:54,702 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.68ms. Allocated memory is still 390.1MB. Free memory was 355.0MB in the beginning and 353.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 09:11:54,703 INFO L158 Benchmark]: Boogie Preprocessor took 31.58ms. Allocated memory is still 390.1MB. Free memory was 353.3MB in the beginning and 351.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 09:11:54,703 INFO L158 Benchmark]: RCFGBuilder took 268.20ms. Allocated memory is still 390.1MB. Free memory was 351.8MB in the beginning and 338.2MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 09:11:54,703 INFO L158 Benchmark]: TraceAbstraction took 842384.37ms. Allocated memory was 390.1MB in the beginning and 6.2GB in the end (delta: 5.8GB). Free memory was 337.6MB in the beginning and 4.6GB in the end (delta: -4.3GB). Peak memory consumption was 5.9GB. Max. memory is 16.0GB. [2023-08-24 09:11:54,704 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 390.1MB. Free memory is still 366.5MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 154.79ms. Allocated memory is still 390.1MB. Free memory was 365.7MB in the beginning and 355.0MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 28.68ms. Allocated memory is still 390.1MB. Free memory was 355.0MB in the beginning and 353.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 31.58ms. Allocated memory is still 390.1MB. Free memory was 353.3MB in the beginning and 351.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 268.20ms. Allocated memory is still 390.1MB. Free memory was 351.8MB in the beginning and 338.2MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 842384.37ms. Allocated memory was 390.1MB in the beginning and 6.2GB in the end (delta: 5.8GB). Free memory was 337.6MB in the beginning and 4.6GB in the end (delta: -4.3GB). Peak memory consumption was 5.9GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.6s, 75 PlacesBefore, 20 PlacesAfterwards, 74 TransitionsBefore, 15 TransitionsAfterwards, 572 CoEnabledTransitionPairs, 6 FixpointIterations, 33 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 66 TotalNumberOfCompositions, 599 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 584, independent: 580, independent conditional: 0, independent unconditional: 580, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 319, independent: 317, independent conditional: 0, independent unconditional: 317, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 584, independent: 263, independent conditional: 0, independent unconditional: 263, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 319, unknown conditional: 0, unknown unconditional: 319] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (21states, 60/150 universal loopers) in iteration 40,while PetriNetUnfolder was constructing finite prefix that currently has 198504 conditions, 12622 events (7559/12621 cut-off events. For 639552/639552 co-relation queries the response was YES. Maximal size of possible extension queue 2046. Compared 107640 event pairs, 2257 based on Foata normal form. 15/14672 useless extension candidates. Maximal degree in co-relation 198193. Up to 10228 conditions per place.). - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (21states, 60/150 universal loopers) in iteration 40,while PetriNetUnfolder was constructing finite prefix that currently has 198504 conditions, 12622 events (7559/12621 cut-off events. For 639552/639552 co-relation queries the response was YES. Maximal size of possible extension queue 2046. Compared 107640 event pairs, 2257 based on Foata normal form. 15/14672 useless extension candidates. Maximal degree in co-relation 198193. Up to 10228 conditions per place.). - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (21states, 60/150 universal loopers) in iteration 40,while PetriNetUnfolder was constructing finite prefix that currently has 198504 conditions, 12622 events (7559/12621 cut-off events. For 639552/639552 co-relation queries the response was YES. Maximal size of possible extension queue 2046. Compared 107640 event pairs, 2257 based on Foata normal form. 15/14672 useless extension candidates. Maximal degree in co-relation 198193. Up to 10228 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 101 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 842.3s, OverallIterations: 40, TraceHistogramMax: 4, PathProgramHistogramMax: 36, EmptinessCheckTime: 0.0s, AutomataDifference: 819.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4455 SdHoareTripleChecker+Valid, 27.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4455 mSDsluCounter, 682 SdHoareTripleChecker+Invalid, 25.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 518 mSDsCounter, 1092 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 26144 IncrementalHoareTripleChecker+Invalid, 27236 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1092 mSolverCounterUnsat, 164 mSDtfsCounter, 26144 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2972 GetRequests, 1226 SyntacticMatches, 74 SemanticMatches, 1672 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31129 ImplicationChecksByTransitivity, 116.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=251904occurred in iteration=39, InterpolantAutomatonStates: 1471, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 10.0s InterpolantComputationTime, 1393 NumberOfCodeBlocks, 1382 NumberOfCodeBlocksAsserted, 132 NumberOfCheckSat, 1960 ConstructedInterpolants, 0 QuantifiedInterpolants, 13377 SizeOfPredicates, 58 NumberOfNonLiveVariables, 5372 ConjunctsInSsa, 549 ConjunctsInUnsatCore, 116 InterpolantComputations, 3 PerfectInterpolantSequences, 132/1105 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown