/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 16:26:34,964 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 16:26:35,025 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 16:26:35,055 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 16:26:35,055 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 16:26:35,056 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 16:26:35,056 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 16:26:35,056 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 16:26:35,057 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 16:26:35,060 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 16:26:35,060 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 16:26:35,060 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 16:26:35,061 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 16:26:35,061 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 16:26:35,062 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 16:26:35,062 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 16:26:35,062 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 16:26:35,062 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 16:26:35,062 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 16:26:35,062 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 16:26:35,062 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 16:26:35,063 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 16:26:35,063 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 16:26:35,063 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 16:26:35,063 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 16:26:35,064 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:26:35,064 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 16:26:35,065 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 16:26:35,065 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 16:26:35,065 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 16:26:35,066 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 16:26:35,066 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 16:26:35,066 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 16:26:35,252 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 16:26:35,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 16:26:35,282 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 16:26:35,283 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 16:26:35,283 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 16:26:35,284 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-11-17 16:26:36,338 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 16:26:36,447 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 16:26:36,448 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-11-17 16:26:36,453 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bb8e089c/a62a3c03a41a472c8611808ff9bbc151/FLAGe98a4d8b0 [2023-11-17 16:26:36,466 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bb8e089c/a62a3c03a41a472c8611808ff9bbc151 [2023-11-17 16:26:36,467 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 16:26:36,468 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 16:26:36,470 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 16:26:36,470 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 16:26:36,473 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 16:26:36,474 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:26:36" (1/1) ... [2023-11-17 16:26:36,474 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56e60a61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:26:36, skipping insertion in model container [2023-11-17 16:26:36,474 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:26:36" (1/1) ... [2023-11-17 16:26:36,493 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 16:26:36,626 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-nonblocking-cntr-alt.wvr.c[2124,2137] [2023-11-17 16:26:36,630 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:26:36,637 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 16:26:36,655 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-nonblocking-cntr-alt.wvr.c[2124,2137] [2023-11-17 16:26:36,659 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:26:36,665 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:26:36,665 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:26:36,669 INFO L206 MainTranslator]: Completed translation [2023-11-17 16:26:36,670 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:26:36 WrapperNode [2023-11-17 16:26:36,670 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 16:26:36,670 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 16:26:36,670 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 16:26:36,671 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 16:26:36,674 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:26:36" (1/1) ... [2023-11-17 16:26:36,679 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:26:36" (1/1) ... [2023-11-17 16:26:36,695 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 58 [2023-11-17 16:26:36,695 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 16:26:36,696 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 16:26:36,696 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 16:26:36,696 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 16:26:36,701 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:26:36" (1/1) ... [2023-11-17 16:26:36,702 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:26:36" (1/1) ... [2023-11-17 16:26:36,710 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:26:36" (1/1) ... [2023-11-17 16:26:36,710 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:26:36" (1/1) ... [2023-11-17 16:26:36,719 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:26:36" (1/1) ... [2023-11-17 16:26:36,721 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:26:36" (1/1) ... [2023-11-17 16:26:36,722 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:26:36" (1/1) ... [2023-11-17 16:26:36,722 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:26:36" (1/1) ... [2023-11-17 16:26:36,723 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 16:26:36,724 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 16:26:36,724 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 16:26:36,724 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 16:26:36,725 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:26:36" (1/1) ... [2023-11-17 16:26:36,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:26:36,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:26:36,748 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 16:26:36,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 16:26:36,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 16:26:36,773 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 16:26:36,773 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 16:26:36,773 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 16:26:36,774 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 16:26:36,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 16:26:36,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 16:26:36,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 16:26:36,775 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 16:26:36,775 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 16:26:36,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 16:26:36,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 16:26:36,775 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 16:26:36,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 16:26:36,777 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 16:26:36,895 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 16:26:36,897 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 16:26:37,049 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 16:26:37,089 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 16:26:37,089 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 16:26:37,091 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:26:37 BoogieIcfgContainer [2023-11-17 16:26:37,091 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 16:26:37,095 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 16:26:37,095 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 16:26:37,098 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 16:26:37,098 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:26:36" (1/3) ... [2023-11-17 16:26:37,099 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23618e97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:26:37, skipping insertion in model container [2023-11-17 16:26:37,099 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:26:36" (2/3) ... [2023-11-17 16:26:37,099 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23618e97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:26:37, skipping insertion in model container [2023-11-17 16:26:37,099 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:26:37" (3/3) ... [2023-11-17 16:26:37,100 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2023-11-17 16:26:37,115 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 16:26:37,115 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 16:26:37,115 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 16:26:37,174 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 16:26:37,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 188 flow [2023-11-17 16:26:37,246 INFO L124 PetriNetUnfolderBase]: 6/85 cut-off events. [2023-11-17 16:26:37,247 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:26:37,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 50 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-11-17 16:26:37,250 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 188 flow [2023-11-17 16:26:37,253 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2023-11-17 16:26:37,255 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 16:26:37,265 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 77 places, 76 transitions, 164 flow [2023-11-17 16:26:37,267 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 77 places, 76 transitions, 164 flow [2023-11-17 16:26:37,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 76 transitions, 164 flow [2023-11-17 16:26:37,286 INFO L124 PetriNetUnfolderBase]: 6/76 cut-off events. [2023-11-17 16:26:37,286 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:26:37,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 76 events. 6/76 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 49 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-11-17 16:26:37,288 INFO L119 LiptonReduction]: Number of co-enabled transitions 504 [2023-11-17 16:26:39,475 INFO L134 LiptonReduction]: Checked pairs total: 545 [2023-11-17 16:26:39,475 INFO L136 LiptonReduction]: Total number of compositions: 76 [2023-11-17 16:26:39,494 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 16:26:39,499 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7b47b2c8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 16:26:39,499 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 16:26:39,502 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 16:26:39,502 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-17 16:26:39,502 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:26:39,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:26:39,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:26:39,503 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:26:39,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:26:39,507 INFO L85 PathProgramCache]: Analyzing trace with hash 833806254, now seen corresponding path program 1 times [2023-11-17 16:26:39,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:26:39,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391381780] [2023-11-17 16:26:39,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:26:39,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:26:39,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:26:39,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:39,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:26:39,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391381780] [2023-11-17 16:26:39,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391381780] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:26:39,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:26:39,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:26:39,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178827467] [2023-11-17 16:26:39,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:26:39,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:26:39,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:26:39,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:26:39,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:26:39,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 163 [2023-11-17 16:26:39,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 72.25) internal successors, (289), 4 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:39,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:26:39,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 163 [2023-11-17 16:26:39,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:26:39,884 INFO L124 PetriNetUnfolderBase]: 51/92 cut-off events. [2023-11-17 16:26:39,884 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-17 16:26:39,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 92 events. 51/92 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 182 event pairs, 24 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 150. Up to 73 conditions per place. [2023-11-17 16:26:39,887 INFO L140 encePairwiseOnDemand]: 159/163 looper letters, 19 selfloop transitions, 3 changer transitions 0/22 dead transitions. [2023-11-17 16:26:39,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 22 transitions, 103 flow [2023-11-17 16:26:39,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:26:39,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:26:39,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 299 transitions. [2023-11-17 16:26:39,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45858895705521474 [2023-11-17 16:26:39,905 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 299 transitions. [2023-11-17 16:26:39,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 299 transitions. [2023-11-17 16:26:39,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:26:39,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 299 transitions. [2023-11-17 16:26:39,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:39,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 163.0) internal successors, (815), 5 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:39,918 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 163.0) internal successors, (815), 5 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:39,919 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 4 states and 299 transitions. [2023-11-17 16:26:39,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 22 transitions, 103 flow [2023-11-17 16:26:39,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 22 transitions, 93 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 16:26:39,927 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 48 flow [2023-11-17 16:26:39,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2023-11-17 16:26:39,932 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2023-11-17 16:26:39,932 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 48 flow [2023-11-17 16:26:39,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.25) internal successors, (289), 4 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:39,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:26:39,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:26:39,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 16:26:39,934 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:26:39,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:26:39,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1712653140, now seen corresponding path program 1 times [2023-11-17 16:26:39,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:26:39,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262361794] [2023-11-17 16:26:39,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:26:39,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:26:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:26:40,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:26:40,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:26:40,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262361794] [2023-11-17 16:26:40,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262361794] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:26:40,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:26:40,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:26:40,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197961448] [2023-11-17 16:26:40,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:26:40,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:26:40,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:26:40,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:26:40,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:26:40,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 163 [2023-11-17 16:26:40,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:40,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:26:40,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 163 [2023-11-17 16:26:40,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:26:40,116 INFO L124 PetriNetUnfolderBase]: 65/116 cut-off events. [2023-11-17 16:26:40,116 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-17 16:26:40,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 116 events. 65/116 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 270 event pairs, 33 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 70. Up to 92 conditions per place. [2023-11-17 16:26:40,117 INFO L140 encePairwiseOnDemand]: 159/163 looper letters, 21 selfloop transitions, 3 changer transitions 0/24 dead transitions. [2023-11-17 16:26:40,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 24 transitions, 123 flow [2023-11-17 16:26:40,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:26:40,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:26:40,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 287 transitions. [2023-11-17 16:26:40,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4401840490797546 [2023-11-17 16:26:40,120 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 287 transitions. [2023-11-17 16:26:40,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 287 transitions. [2023-11-17 16:26:40,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:26:40,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 287 transitions. [2023-11-17 16:26:40,121 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) [2023-11-17 16:26:40,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 163.0) internal successors, (815), 5 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:40,124 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 163.0) internal successors, (815), 5 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:40,124 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 48 flow. Second operand 4 states and 287 transitions. [2023-11-17 16:26:40,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 24 transitions, 123 flow [2023-11-17 16:26:40,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 24 transitions, 113 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-17 16:26:40,125 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 56 flow [2023-11-17 16:26:40,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-11-17 16:26:40,126 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2023-11-17 16:26:40,126 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 56 flow [2023-11-17 16:26:40,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:40,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:26:40,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:26:40,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 16:26:40,127 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:26:40,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:26:40,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1895985706, now seen corresponding path program 1 times [2023-11-17 16:26:40,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:26:40,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417561424] [2023-11-17 16:26:40,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:26:40,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:26:40,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:26:40,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:40,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:26:40,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417561424] [2023-11-17 16:26:40,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417561424] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:26:40,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018235297] [2023-11-17 16:26:40,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:26:40,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:26:40,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:26:40,397 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:26:40,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 16:26:40,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:26:40,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:26:40,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:26:40,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:40,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:26:41,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:41,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018235297] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:26:41,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:26:41,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-11-17 16:26:41,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977635524] [2023-11-17 16:26:41,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:26:41,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 16:26:41,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:26:41,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 16:26:41,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2023-11-17 16:26:41,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:26:41,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 56 flow. Second operand has 22 states, 22 states have (on average 61.86363636363637) internal successors, (1361), 22 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:41,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:26:41,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:26:41,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:26:41,753 INFO L124 PetriNetUnfolderBase]: 172/325 cut-off events. [2023-11-17 16:26:41,753 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2023-11-17 16:26:41,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 857 conditions, 325 events. 172/325 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1239 event pairs, 12 based on Foata normal form. 2/253 useless extension candidates. Maximal degree in co-relation 262. Up to 111 conditions per place. [2023-11-17 16:26:41,759 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 67 selfloop transitions, 35 changer transitions 19/121 dead transitions. [2023-11-17 16:26:41,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 121 transitions, 610 flow [2023-11-17 16:26:41,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 16:26:41,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 16:26:41,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1318 transitions. [2023-11-17 16:26:41,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40429447852760736 [2023-11-17 16:26:41,763 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1318 transitions. [2023-11-17 16:26:41,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1318 transitions. [2023-11-17 16:26:41,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:26:41,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1318 transitions. [2023-11-17 16:26:41,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 65.9) internal successors, (1318), 20 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:41,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 163.0) internal successors, (3423), 21 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:41,772 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 163.0) internal successors, (3423), 21 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:41,772 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 56 flow. Second operand 20 states and 1318 transitions. [2023-11-17 16:26:41,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 121 transitions, 610 flow [2023-11-17 16:26:41,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 121 transitions, 596 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-17 16:26:41,777 INFO L231 Difference]: Finished difference. Result has 44 places, 55 transitions, 300 flow [2023-11-17 16:26:41,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=300, PETRI_PLACES=44, PETRI_TRANSITIONS=55} [2023-11-17 16:26:41,778 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 24 predicate places. [2023-11-17 16:26:41,778 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 55 transitions, 300 flow [2023-11-17 16:26:41,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 61.86363636363637) internal successors, (1361), 22 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:41,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:26:41,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:26:41,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 16:26:41,983 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 [2023-11-17 16:26:41,986 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:26:41,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:26:41,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1798769560, now seen corresponding path program 2 times [2023-11-17 16:26:41,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:26:41,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513735428] [2023-11-17 16:26:41,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:26:41,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:26:42,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:26:42,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:42,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:26:42,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513735428] [2023-11-17 16:26:42,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513735428] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:26:42,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180683526] [2023-11-17 16:26:42,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:26:42,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:26:42,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:26:42,210 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:26:42,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 16:26:42,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:26:42,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:26:42,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:26:42,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:26:42,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:42,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:26:42,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:42,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180683526] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:26:42,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:26:42,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-11-17 16:26:42,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504333569] [2023-11-17 16:26:42,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:26:42,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 16:26:42,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:26:42,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 16:26:42,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2023-11-17 16:26:42,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:26:42,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 55 transitions, 300 flow. Second operand has 22 states, 22 states have (on average 61.95454545454545) internal successors, (1363), 22 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:42,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:26:42,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:26:42,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:26:43,277 INFO L124 PetriNetUnfolderBase]: 180/363 cut-off events. [2023-11-17 16:26:43,277 INFO L125 PetriNetUnfolderBase]: For 448/448 co-relation queries the response was YES. [2023-11-17 16:26:43,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1272 conditions, 363 events. 180/363 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1516 event pairs, 27 based on Foata normal form. 2/333 useless extension candidates. Maximal degree in co-relation 1234. Up to 121 conditions per place. [2023-11-17 16:26:43,279 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 67 selfloop transitions, 30 changer transitions 29/126 dead transitions. [2023-11-17 16:26:43,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 126 transitions, 806 flow [2023-11-17 16:26:43,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 16:26:43,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 16:26:43,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1315 transitions. [2023-11-17 16:26:43,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40337423312883436 [2023-11-17 16:26:43,282 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1315 transitions. [2023-11-17 16:26:43,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1315 transitions. [2023-11-17 16:26:43,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:26:43,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1315 transitions. [2023-11-17 16:26:43,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 65.75) internal successors, (1315), 20 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:43,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 163.0) internal successors, (3423), 21 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:43,289 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 163.0) internal successors, (3423), 21 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:43,289 INFO L175 Difference]: Start difference. First operand has 44 places, 55 transitions, 300 flow. Second operand 20 states and 1315 transitions. [2023-11-17 16:26:43,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 126 transitions, 806 flow [2023-11-17 16:26:43,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 126 transitions, 722 flow, removed 36 selfloop flow, removed 4 redundant places. [2023-11-17 16:26:43,294 INFO L231 Difference]: Finished difference. Result has 62 places, 53 transitions, 315 flow [2023-11-17 16:26:43,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=315, PETRI_PLACES=62, PETRI_TRANSITIONS=53} [2023-11-17 16:26:43,295 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 42 predicate places. [2023-11-17 16:26:43,295 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 53 transitions, 315 flow [2023-11-17 16:26:43,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 61.95454545454545) internal successors, (1363), 22 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:43,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:26:43,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:26:43,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-17 16:26:43,500 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 [2023-11-17 16:26:43,500 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:26:43,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:26:43,501 INFO L85 PathProgramCache]: Analyzing trace with hash -29277608, now seen corresponding path program 3 times [2023-11-17 16:26:43,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:26:43,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465369674] [2023-11-17 16:26:43,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:26:43,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:26:43,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:26:43,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:43,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:26:43,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465369674] [2023-11-17 16:26:43,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465369674] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:26:43,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168438963] [2023-11-17 16:26:43,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:26:43,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:26:43,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:26:43,673 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:26:43,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 16:26:43,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:26:43,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:26:43,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:26:43,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:26:43,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:43,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:26:44,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:44,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168438963] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:26:44,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:26:44,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-11-17 16:26:44,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117050874] [2023-11-17 16:26:44,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:26:44,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 16:26:44,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:26:44,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 16:26:44,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2023-11-17 16:26:44,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:26:44,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 53 transitions, 315 flow. Second operand has 22 states, 22 states have (on average 61.86363636363637) internal successors, (1361), 22 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:44,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:26:44,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:26:44,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:26:44,547 INFO L124 PetriNetUnfolderBase]: 167/340 cut-off events. [2023-11-17 16:26:44,547 INFO L125 PetriNetUnfolderBase]: For 546/546 co-relation queries the response was YES. [2023-11-17 16:26:44,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1254 conditions, 340 events. 167/340 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1386 event pairs, 20 based on Foata normal form. 1/329 useless extension candidates. Maximal degree in co-relation 1205. Up to 135 conditions per place. [2023-11-17 16:26:44,549 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 64 selfloop transitions, 38 changer transitions 16/118 dead transitions. [2023-11-17 16:26:44,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 118 transitions, 810 flow [2023-11-17 16:26:44,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 16:26:44,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 16:26:44,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1183 transitions. [2023-11-17 16:26:44,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40320381731424676 [2023-11-17 16:26:44,553 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1183 transitions. [2023-11-17 16:26:44,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1183 transitions. [2023-11-17 16:26:44,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:26:44,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1183 transitions. [2023-11-17 16:26:44,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 65.72222222222223) internal successors, (1183), 18 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:44,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 163.0) internal successors, (3097), 19 states have internal predecessors, (3097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:44,559 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 163.0) internal successors, (3097), 19 states have internal predecessors, (3097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:44,559 INFO L175 Difference]: Start difference. First operand has 62 places, 53 transitions, 315 flow. Second operand 18 states and 1183 transitions. [2023-11-17 16:26:44,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 118 transitions, 810 flow [2023-11-17 16:26:44,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 118 transitions, 704 flow, removed 18 selfloop flow, removed 15 redundant places. [2023-11-17 16:26:44,564 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 389 flow [2023-11-17 16:26:44,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=389, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2023-11-17 16:26:44,565 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 42 predicate places. [2023-11-17 16:26:44,566 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 389 flow [2023-11-17 16:26:44,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 61.86363636363637) internal successors, (1361), 22 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:44,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:26:44,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:26:44,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-17 16:26:44,772 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 [2023-11-17 16:26:44,775 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:26:44,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:26:44,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1321856522, now seen corresponding path program 4 times [2023-11-17 16:26:44,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:26:44,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98459329] [2023-11-17 16:26:44,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:26:44,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:26:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:26:44,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:44,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:26:44,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98459329] [2023-11-17 16:26:44,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98459329] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:26:44,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469955161] [2023-11-17 16:26:44,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:26:44,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:26:44,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:26:44,838 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:26:44,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-17 16:26:44,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:26:44,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:26:44,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 16:26:44,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:26:44,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:44,908 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:26:44,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:44,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469955161] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:26:44,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:26:44,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2023-11-17 16:26:44,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302705546] [2023-11-17 16:26:44,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:26:44,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:26:44,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:26:44,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:26:44,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-17 16:26:44,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 163 [2023-11-17 16:26:44,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 389 flow. Second operand has 7 states, 7 states have (on average 71.57142857142857) internal successors, (501), 7 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:44,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:26:44,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 163 [2023-11-17 16:26:44,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:26:44,986 INFO L124 PetriNetUnfolderBase]: 160/306 cut-off events. [2023-11-17 16:26:44,986 INFO L125 PetriNetUnfolderBase]: For 524/524 co-relation queries the response was YES. [2023-11-17 16:26:44,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1128 conditions, 306 events. 160/306 cut-off events. For 524/524 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1103 event pairs, 25 based on Foata normal form. 18/310 useless extension candidates. Maximal degree in co-relation 1099. Up to 229 conditions per place. [2023-11-17 16:26:44,988 INFO L140 encePairwiseOnDemand]: 158/163 looper letters, 54 selfloop transitions, 12 changer transitions 1/67 dead transitions. [2023-11-17 16:26:44,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 67 transitions, 521 flow [2023-11-17 16:26:44,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:26:44,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:26:44,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 372 transitions. [2023-11-17 16:26:44,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.456441717791411 [2023-11-17 16:26:44,989 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 372 transitions. [2023-11-17 16:26:44,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 372 transitions. [2023-11-17 16:26:44,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:26:44,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 372 transitions. [2023-11-17 16:26:44,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:44,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:44,991 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:44,991 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 389 flow. Second operand 5 states and 372 transitions. [2023-11-17 16:26:44,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 67 transitions, 521 flow [2023-11-17 16:26:44,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 67 transitions, 443 flow, removed 8 selfloop flow, removed 10 redundant places. [2023-11-17 16:26:44,995 INFO L231 Difference]: Finished difference. Result has 50 places, 55 transitions, 319 flow [2023-11-17 16:26:44,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=319, PETRI_PLACES=50, PETRI_TRANSITIONS=55} [2023-11-17 16:26:44,997 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 30 predicate places. [2023-11-17 16:26:44,998 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 55 transitions, 319 flow [2023-11-17 16:26:44,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 71.57142857142857) internal successors, (501), 7 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:44,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:26:44,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:26:45,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-17 16:26:45,202 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 [2023-11-17 16:26:45,203 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:26:45,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:26:45,203 INFO L85 PathProgramCache]: Analyzing trace with hash 33384716, now seen corresponding path program 5 times [2023-11-17 16:26:45,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:26:45,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967524802] [2023-11-17 16:26:45,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:26:45,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:26:45,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:26:45,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:45,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:26:45,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967524802] [2023-11-17 16:26:45,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967524802] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:26:45,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376506660] [2023-11-17 16:26:45,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:26:45,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:26:45,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:26:45,356 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:26:45,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-17 16:26:45,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:26:45,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:26:45,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 16:26:45,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:26:45,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:45,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:26:45,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:45,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376506660] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:26:45,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:26:45,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-11-17 16:26:45,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724279874] [2023-11-17 16:26:45,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:26:45,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 16:26:45,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:26:45,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 16:26:45,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2023-11-17 16:26:45,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:26:45,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 55 transitions, 319 flow. Second operand has 22 states, 22 states have (on average 61.90909090909091) internal successors, (1362), 22 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:45,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:26:45,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:26:45,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:26:46,242 INFO L124 PetriNetUnfolderBase]: 229/457 cut-off events. [2023-11-17 16:26:46,242 INFO L125 PetriNetUnfolderBase]: For 735/735 co-relation queries the response was YES. [2023-11-17 16:26:46,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1673 conditions, 457 events. 229/457 cut-off events. For 735/735 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2022 event pairs, 26 based on Foata normal form. 3/432 useless extension candidates. Maximal degree in co-relation 1457. Up to 257 conditions per place. [2023-11-17 16:26:46,244 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 75 selfloop transitions, 36 changer transitions 24/135 dead transitions. [2023-11-17 16:26:46,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 135 transitions, 925 flow [2023-11-17 16:26:46,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 16:26:46,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 16:26:46,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1367 transitions. [2023-11-17 16:26:46,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39935728892784106 [2023-11-17 16:26:46,248 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1367 transitions. [2023-11-17 16:26:46,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1367 transitions. [2023-11-17 16:26:46,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:26:46,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1367 transitions. [2023-11-17 16:26:46,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 65.0952380952381) internal successors, (1367), 21 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:46,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 163.0) internal successors, (3586), 22 states have internal predecessors, (3586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:46,254 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 163.0) internal successors, (3586), 22 states have internal predecessors, (3586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:46,254 INFO L175 Difference]: Start difference. First operand has 50 places, 55 transitions, 319 flow. Second operand 21 states and 1367 transitions. [2023-11-17 16:26:46,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 135 transitions, 925 flow [2023-11-17 16:26:46,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 135 transitions, 885 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-11-17 16:26:46,258 INFO L231 Difference]: Finished difference. Result has 78 places, 73 transitions, 539 flow [2023-11-17 16:26:46,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=539, PETRI_PLACES=78, PETRI_TRANSITIONS=73} [2023-11-17 16:26:46,259 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 58 predicate places. [2023-11-17 16:26:46,259 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 73 transitions, 539 flow [2023-11-17 16:26:46,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 61.90909090909091) internal successors, (1362), 22 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:46,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:26:46,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:26:46,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-17 16:26:46,464 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 [2023-11-17 16:26:46,464 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:26:46,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:26:46,465 INFO L85 PathProgramCache]: Analyzing trace with hash 278152630, now seen corresponding path program 6 times [2023-11-17 16:26:46,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:26:46,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110265314] [2023-11-17 16:26:46,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:26:46,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:26:46,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:26:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:46,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:26:46,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110265314] [2023-11-17 16:26:46,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110265314] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:26:46,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62149633] [2023-11-17 16:26:46,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:26:46,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:26:46,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:26:46,641 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:26:46,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-17 16:26:46,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:26:46,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:26:46,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:26:46,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:26:46,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:46,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:26:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:47,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62149633] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:26:47,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:26:47,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-11-17 16:26:47,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293702404] [2023-11-17 16:26:47,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:26:47,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 16:26:47,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:26:47,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 16:26:47,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2023-11-17 16:26:47,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:26:47,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 73 transitions, 539 flow. Second operand has 22 states, 22 states have (on average 61.86363636363637) internal successors, (1361), 22 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:47,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:26:47,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:26:47,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:26:47,466 INFO L124 PetriNetUnfolderBase]: 211/411 cut-off events. [2023-11-17 16:26:47,466 INFO L125 PetriNetUnfolderBase]: For 1109/1109 co-relation queries the response was YES. [2023-11-17 16:26:47,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1724 conditions, 411 events. 211/411 cut-off events. For 1109/1109 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1697 event pairs, 28 based on Foata normal form. 1/390 useless extension candidates. Maximal degree in co-relation 1672. Up to 306 conditions per place. [2023-11-17 16:26:47,469 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 70 selfloop transitions, 22 changer transitions 16/108 dead transitions. [2023-11-17 16:26:47,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 108 transitions, 892 flow [2023-11-17 16:26:47,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 16:26:47,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 16:26:47,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 842 transitions. [2023-11-17 16:26:47,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39735724398301087 [2023-11-17 16:26:47,472 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 842 transitions. [2023-11-17 16:26:47,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 842 transitions. [2023-11-17 16:26:47,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:26:47,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 842 transitions. [2023-11-17 16:26:47,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 64.76923076923077) internal successors, (842), 13 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:47,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 163.0) internal successors, (2282), 14 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:47,478 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 163.0) internal successors, (2282), 14 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:47,478 INFO L175 Difference]: Start difference. First operand has 78 places, 73 transitions, 539 flow. Second operand 13 states and 842 transitions. [2023-11-17 16:26:47,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 108 transitions, 892 flow [2023-11-17 16:26:47,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 108 transitions, 814 flow, removed 25 selfloop flow, removed 10 redundant places. [2023-11-17 16:26:47,483 INFO L231 Difference]: Finished difference. Result has 78 places, 74 transitions, 536 flow [2023-11-17 16:26:47,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=536, PETRI_PLACES=78, PETRI_TRANSITIONS=74} [2023-11-17 16:26:47,485 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 58 predicate places. [2023-11-17 16:26:47,485 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 74 transitions, 536 flow [2023-11-17 16:26:47,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 61.86363636363637) internal successors, (1361), 22 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:47,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:26:47,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:26:47,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-17 16:26:47,690 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 [2023-11-17 16:26:47,691 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:26:47,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:26:47,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1444091144, now seen corresponding path program 7 times [2023-11-17 16:26:47,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:26:47,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966275158] [2023-11-17 16:26:47,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:26:47,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:26:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:26:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:47,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:26:47,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966275158] [2023-11-17 16:26:47,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966275158] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:26:47,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169167469] [2023-11-17 16:26:47,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:26:47,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:26:47,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:26:47,881 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:26:47,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-17 16:26:47,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:26:47,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:26:47,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:26:48,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:48,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:26:48,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:48,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169167469] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:26:48,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:26:48,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-17 16:26:48,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567448709] [2023-11-17 16:26:48,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:26:48,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 16:26:48,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:26:48,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 16:26:48,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2023-11-17 16:26:48,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:26:48,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 74 transitions, 536 flow. Second operand has 21 states, 21 states have (on average 61.76190476190476) internal successors, (1297), 21 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:48,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:26:48,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:26:48,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:26:48,675 INFO L124 PetriNetUnfolderBase]: 219/427 cut-off events. [2023-11-17 16:26:48,676 INFO L125 PetriNetUnfolderBase]: For 1018/1018 co-relation queries the response was YES. [2023-11-17 16:26:48,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1731 conditions, 427 events. 219/427 cut-off events. For 1018/1018 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1768 event pairs, 16 based on Foata normal form. 2/407 useless extension candidates. Maximal degree in co-relation 1690. Up to 265 conditions per place. [2023-11-17 16:26:48,679 INFO L140 encePairwiseOnDemand]: 154/163 looper letters, 81 selfloop transitions, 27 changer transitions 20/128 dead transitions. [2023-11-17 16:26:48,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 128 transitions, 1025 flow [2023-11-17 16:26:48,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 16:26:48,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 16:26:48,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 919 transitions. [2023-11-17 16:26:48,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40271691498685364 [2023-11-17 16:26:48,681 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 919 transitions. [2023-11-17 16:26:48,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 919 transitions. [2023-11-17 16:26:48,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:26:48,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 919 transitions. [2023-11-17 16:26:48,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 65.64285714285714) internal successors, (919), 14 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:48,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 163.0) internal successors, (2445), 15 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:48,686 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 163.0) internal successors, (2445), 15 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:48,686 INFO L175 Difference]: Start difference. First operand has 78 places, 74 transitions, 536 flow. Second operand 14 states and 919 transitions. [2023-11-17 16:26:48,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 128 transitions, 1025 flow [2023-11-17 16:26:48,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 128 transitions, 959 flow, removed 15 selfloop flow, removed 7 redundant places. [2023-11-17 16:26:48,691 INFO L231 Difference]: Finished difference. Result has 89 places, 79 transitions, 609 flow [2023-11-17 16:26:48,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=609, PETRI_PLACES=89, PETRI_TRANSITIONS=79} [2023-11-17 16:26:48,692 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 69 predicate places. [2023-11-17 16:26:48,692 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 79 transitions, 609 flow [2023-11-17 16:26:48,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 61.76190476190476) internal successors, (1297), 21 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:48,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:26:48,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:26:48,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-17 16:26:48,897 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 [2023-11-17 16:26:48,897 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:26:48,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:26:48,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1338039880, now seen corresponding path program 8 times [2023-11-17 16:26:48,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:26:48,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154767509] [2023-11-17 16:26:48,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:26:48,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:26:48,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:26:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:49,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:26:49,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154767509] [2023-11-17 16:26:49,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154767509] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:26:49,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113348653] [2023-11-17 16:26:49,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:26:49,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:26:49,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:26:49,045 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:26:49,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-17 16:26:49,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:26:49,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:26:49,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 16:26:49,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:26:49,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:49,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:26:49,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:49,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113348653] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:26:49,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:26:49,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-11-17 16:26:49,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518550456] [2023-11-17 16:26:49,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:26:49,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 16:26:49,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:26:49,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 16:26:49,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2023-11-17 16:26:49,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:26:49,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 79 transitions, 609 flow. Second operand has 22 states, 22 states have (on average 61.86363636363637) internal successors, (1361), 22 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:49,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:26:49,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:26:49,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:26:49,829 INFO L124 PetriNetUnfolderBase]: 191/361 cut-off events. [2023-11-17 16:26:49,829 INFO L125 PetriNetUnfolderBase]: For 898/898 co-relation queries the response was YES. [2023-11-17 16:26:49,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1569 conditions, 361 events. 191/361 cut-off events. For 898/898 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1337 event pairs, 14 based on Foata normal form. 1/362 useless extension candidates. Maximal degree in co-relation 1521. Up to 266 conditions per place. [2023-11-17 16:26:49,868 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 74 selfloop transitions, 25 changer transitions 9/108 dead transitions. [2023-11-17 16:26:49,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 108 transitions, 935 flow [2023-11-17 16:26:49,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 16:26:49,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 16:26:49,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 838 transitions. [2023-11-17 16:26:49,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3954695611137329 [2023-11-17 16:26:49,870 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 838 transitions. [2023-11-17 16:26:49,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 838 transitions. [2023-11-17 16:26:49,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:26:49,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 838 transitions. [2023-11-17 16:26:49,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 64.46153846153847) internal successors, (838), 13 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:49,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 163.0) internal successors, (2282), 14 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:49,874 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 163.0) internal successors, (2282), 14 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:49,874 INFO L175 Difference]: Start difference. First operand has 89 places, 79 transitions, 609 flow. Second operand 13 states and 838 transitions. [2023-11-17 16:26:49,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 108 transitions, 935 flow [2023-11-17 16:26:49,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 108 transitions, 848 flow, removed 19 selfloop flow, removed 13 redundant places. [2023-11-17 16:26:49,879 INFO L231 Difference]: Finished difference. Result has 85 places, 80 transitions, 605 flow [2023-11-17 16:26:49,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=605, PETRI_PLACES=85, PETRI_TRANSITIONS=80} [2023-11-17 16:26:49,879 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 65 predicate places. [2023-11-17 16:26:49,879 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 80 transitions, 605 flow [2023-11-17 16:26:49,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 61.86363636363637) internal successors, (1361), 22 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:49,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:26:49,892 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:26:49,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-17 16:26:50,096 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 [2023-11-17 16:26:50,097 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:26:50,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:26:50,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1463662288, now seen corresponding path program 9 times [2023-11-17 16:26:50,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:26:50,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947581203] [2023-11-17 16:26:50,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:26:50,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:26:50,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:26:50,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:50,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:26:50,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947581203] [2023-11-17 16:26:50,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947581203] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:26:50,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440595020] [2023-11-17 16:26:50,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:26:50,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:26:50,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:26:50,258 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:26:50,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-17 16:26:50,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:26:50,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:26:50,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 16:26:50,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:26:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:50,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:26:50,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:50,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440595020] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:26:50,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:26:50,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-17 16:26:50,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205901062] [2023-11-17 16:26:50,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:26:50,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 16:26:50,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:26:50,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 16:26:50,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2023-11-17 16:26:50,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:26:50,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 80 transitions, 605 flow. Second operand has 25 states, 25 states have (on average 61.8) internal successors, (1545), 25 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:50,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:26:50,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:26:50,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:26:51,694 INFO L124 PetriNetUnfolderBase]: 275/537 cut-off events. [2023-11-17 16:26:51,694 INFO L125 PetriNetUnfolderBase]: For 1826/1826 co-relation queries the response was YES. [2023-11-17 16:26:51,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2367 conditions, 537 events. 275/537 cut-off events. For 1826/1826 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2420 event pairs, 14 based on Foata normal form. 3/540 useless extension candidates. Maximal degree in co-relation 2322. Up to 203 conditions per place. [2023-11-17 16:26:51,697 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 98 selfloop transitions, 86 changer transitions 20/204 dead transitions. [2023-11-17 16:26:51,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 204 transitions, 1619 flow [2023-11-17 16:26:51,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-17 16:26:51,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-17 16:26:51,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1962 transitions. [2023-11-17 16:26:51,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4012269938650307 [2023-11-17 16:26:51,711 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1962 transitions. [2023-11-17 16:26:51,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1962 transitions. [2023-11-17 16:26:51,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:26:51,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1962 transitions. [2023-11-17 16:26:51,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 65.4) internal successors, (1962), 30 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:51,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 163.0) internal successors, (5053), 31 states have internal predecessors, (5053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:51,719 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 163.0) internal successors, (5053), 31 states have internal predecessors, (5053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:51,719 INFO L175 Difference]: Start difference. First operand has 85 places, 80 transitions, 605 flow. Second operand 30 states and 1962 transitions. [2023-11-17 16:26:51,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 204 transitions, 1619 flow [2023-11-17 16:26:51,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 204 transitions, 1522 flow, removed 21 selfloop flow, removed 11 redundant places. [2023-11-17 16:26:51,727 INFO L231 Difference]: Finished difference. Result has 107 places, 109 transitions, 954 flow [2023-11-17 16:26:51,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=954, PETRI_PLACES=107, PETRI_TRANSITIONS=109} [2023-11-17 16:26:51,728 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 87 predicate places. [2023-11-17 16:26:51,728 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 109 transitions, 954 flow [2023-11-17 16:26:51,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 61.8) internal successors, (1545), 25 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:51,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:26:51,729 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:26:51,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-17 16:26:51,933 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 [2023-11-17 16:26:51,934 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:26:51,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:26:51,934 INFO L85 PathProgramCache]: Analyzing trace with hash -898441734, now seen corresponding path program 10 times [2023-11-17 16:26:51,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:26:51,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521257458] [2023-11-17 16:26:51,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:26:51,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:26:51,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:26:52,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:52,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:26:52,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521257458] [2023-11-17 16:26:52,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521257458] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:26:52,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174839128] [2023-11-17 16:26:52,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:26:52,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:26:52,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:26:52,085 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:26:52,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-17 16:26:52,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:26:52,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:26:52,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 16:26:52,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:26:52,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:52,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:26:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:52,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174839128] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:26:52,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:26:52,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-17 16:26:52,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187642547] [2023-11-17 16:26:52,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:26:52,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 16:26:52,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:26:52,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 16:26:52,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2023-11-17 16:26:52,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:26:52,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 109 transitions, 954 flow. Second operand has 25 states, 25 states have (on average 61.76) internal successors, (1544), 25 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:52,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:26:52,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:26:52,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:26:53,711 INFO L124 PetriNetUnfolderBase]: 346/696 cut-off events. [2023-11-17 16:26:53,711 INFO L125 PetriNetUnfolderBase]: For 4193/4193 co-relation queries the response was YES. [2023-11-17 16:26:53,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3554 conditions, 696 events. 346/696 cut-off events. For 4193/4193 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3531 event pairs, 16 based on Foata normal form. 3/699 useless extension candidates. Maximal degree in co-relation 3480. Up to 273 conditions per place. [2023-11-17 16:26:53,715 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 121 selfloop transitions, 104 changer transitions 15/240 dead transitions. [2023-11-17 16:26:53,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 240 transitions, 2139 flow [2023-11-17 16:26:53,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-17 16:26:53,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-17 16:26:53,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2341 transitions. [2023-11-17 16:26:53,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3989434219495569 [2023-11-17 16:26:53,718 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2341 transitions. [2023-11-17 16:26:53,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2341 transitions. [2023-11-17 16:26:53,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:26:53,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2341 transitions. [2023-11-17 16:26:53,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 65.02777777777777) internal successors, (2341), 36 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:53,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 163.0) internal successors, (6031), 37 states have internal predecessors, (6031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:53,726 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 163.0) internal successors, (6031), 37 states have internal predecessors, (6031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:53,726 INFO L175 Difference]: Start difference. First operand has 107 places, 109 transitions, 954 flow. Second operand 36 states and 2341 transitions. [2023-11-17 16:26:53,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 240 transitions, 2139 flow [2023-11-17 16:26:53,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 240 transitions, 1770 flow, removed 152 selfloop flow, removed 12 redundant places. [2023-11-17 16:26:53,739 INFO L231 Difference]: Finished difference. Result has 136 places, 138 transitions, 1301 flow [2023-11-17 16:26:53,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1301, PETRI_PLACES=136, PETRI_TRANSITIONS=138} [2023-11-17 16:26:53,739 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 116 predicate places. [2023-11-17 16:26:53,739 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 138 transitions, 1301 flow [2023-11-17 16:26:53,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 61.76) internal successors, (1544), 25 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:53,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:26:53,740 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:26:53,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-17 16:26:53,944 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 [2023-11-17 16:26:53,945 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:26:53,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:26:53,945 INFO L85 PathProgramCache]: Analyzing trace with hash -975273684, now seen corresponding path program 11 times [2023-11-17 16:26:53,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:26:53,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749341451] [2023-11-17 16:26:53,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:26:53,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:26:53,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:26:54,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:54,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:26:54,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749341451] [2023-11-17 16:26:54,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749341451] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:26:54,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65718665] [2023-11-17 16:26:54,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:26:54,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:26:54,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:26:54,090 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:26:54,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-17 16:26:54,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:26:54,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:26:54,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 16:26:54,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:26:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:54,301 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:26:54,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:54,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65718665] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:26:54,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:26:54,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-17 16:26:54,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618088595] [2023-11-17 16:26:54,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:26:54,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 16:26:54,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:26:54,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 16:26:54,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2023-11-17 16:26:54,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:26:54,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 138 transitions, 1301 flow. Second operand has 25 states, 25 states have (on average 61.84) internal successors, (1546), 25 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:54,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:26:54,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:26:54,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:26:55,649 INFO L124 PetriNetUnfolderBase]: 363/732 cut-off events. [2023-11-17 16:26:55,649 INFO L125 PetriNetUnfolderBase]: For 4710/4710 co-relation queries the response was YES. [2023-11-17 16:26:55,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3786 conditions, 732 events. 363/732 cut-off events. For 4710/4710 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3781 event pairs, 20 based on Foata normal form. 4/734 useless extension candidates. Maximal degree in co-relation 3700. Up to 261 conditions per place. [2023-11-17 16:26:55,654 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 120 selfloop transitions, 104 changer transitions 26/250 dead transitions. [2023-11-17 16:26:55,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 250 transitions, 2305 flow [2023-11-17 16:26:55,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-17 16:26:55,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-17 16:26:55,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2232 transitions. [2023-11-17 16:26:55,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027426921688921 [2023-11-17 16:26:55,656 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2232 transitions. [2023-11-17 16:26:55,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2232 transitions. [2023-11-17 16:26:55,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:26:55,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2232 transitions. [2023-11-17 16:26:55,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 65.6470588235294) internal successors, (2232), 34 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:55,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 163.0) internal successors, (5705), 35 states have internal predecessors, (5705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:55,663 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 163.0) internal successors, (5705), 35 states have internal predecessors, (5705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:55,663 INFO L175 Difference]: Start difference. First operand has 136 places, 138 transitions, 1301 flow. Second operand 34 states and 2232 transitions. [2023-11-17 16:26:55,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 250 transitions, 2305 flow [2023-11-17 16:26:55,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 250 transitions, 1901 flow, removed 162 selfloop flow, removed 17 redundant places. [2023-11-17 16:26:55,683 INFO L231 Difference]: Finished difference. Result has 155 places, 139 transitions, 1278 flow [2023-11-17 16:26:55,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1278, PETRI_PLACES=155, PETRI_TRANSITIONS=139} [2023-11-17 16:26:55,684 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 135 predicate places. [2023-11-17 16:26:55,684 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 139 transitions, 1278 flow [2023-11-17 16:26:55,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 61.84) internal successors, (1546), 25 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:55,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:26:55,684 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:26:55,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-17 16:26:55,889 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 [2023-11-17 16:26:55,889 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:26:55,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:26:55,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1012507738, now seen corresponding path program 12 times [2023-11-17 16:26:55,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:26:55,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465194287] [2023-11-17 16:26:55,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:26:55,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:26:55,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:26:56,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:56,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:26:56,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465194287] [2023-11-17 16:26:56,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465194287] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:26:56,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447579207] [2023-11-17 16:26:56,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:26:56,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:26:56,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:26:56,068 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:26:56,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-17 16:26:56,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 16:26:56,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:26:56,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 16:26:56,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:26:56,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:56,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:26:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:56,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447579207] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:26:56,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:26:56,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-17 16:26:56,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297874728] [2023-11-17 16:26:56,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:26:56,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 16:26:56,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:26:56,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 16:26:56,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2023-11-17 16:26:56,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:26:56,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 139 transitions, 1278 flow. Second operand has 25 states, 25 states have (on average 61.84) internal successors, (1546), 25 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:56,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:26:56,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:26:56,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:26:57,619 INFO L124 PetriNetUnfolderBase]: 365/742 cut-off events. [2023-11-17 16:26:57,619 INFO L125 PetriNetUnfolderBase]: For 2120/2120 co-relation queries the response was YES. [2023-11-17 16:26:57,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3492 conditions, 742 events. 365/742 cut-off events. For 2120/2120 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3833 event pairs, 28 based on Foata normal form. 3/743 useless extension candidates. Maximal degree in co-relation 3391. Up to 326 conditions per place. [2023-11-17 16:26:57,623 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 113 selfloop transitions, 90 changer transitions 20/223 dead transitions. [2023-11-17 16:26:57,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 223 transitions, 2035 flow [2023-11-17 16:26:57,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 16:26:57,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 16:26:57,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1892 transitions. [2023-11-17 16:26:57,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4002538607996615 [2023-11-17 16:26:57,634 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1892 transitions. [2023-11-17 16:26:57,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1892 transitions. [2023-11-17 16:26:57,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:26:57,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1892 transitions. [2023-11-17 16:26:57,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 65.24137931034483) internal successors, (1892), 29 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:57,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 163.0) internal successors, (4890), 30 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:57,645 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 163.0) internal successors, (4890), 30 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:57,645 INFO L175 Difference]: Start difference. First operand has 155 places, 139 transitions, 1278 flow. Second operand 29 states and 1892 transitions. [2023-11-17 16:26:57,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 223 transitions, 2035 flow [2023-11-17 16:26:57,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 223 transitions, 1827 flow, removed 19 selfloop flow, removed 24 redundant places. [2023-11-17 16:26:57,657 INFO L231 Difference]: Finished difference. Result has 157 places, 138 transitions, 1297 flow [2023-11-17 16:26:57,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1297, PETRI_PLACES=157, PETRI_TRANSITIONS=138} [2023-11-17 16:26:57,657 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 137 predicate places. [2023-11-17 16:26:57,658 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 138 transitions, 1297 flow [2023-11-17 16:26:57,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 61.84) internal successors, (1546), 25 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:57,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:26:57,658 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:26:57,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-17 16:26:57,863 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 [2023-11-17 16:26:57,863 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:26:57,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:26:57,864 INFO L85 PathProgramCache]: Analyzing trace with hash 382829244, now seen corresponding path program 13 times [2023-11-17 16:26:57,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:26:57,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997322121] [2023-11-17 16:26:57,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:26:57,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:26:57,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:26:58,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:58,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:26:58,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997322121] [2023-11-17 16:26:58,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997322121] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:26:58,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949192502] [2023-11-17 16:26:58,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:26:58,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:26:58,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:26:58,027 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) [2023-11-17 16:26:58,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-17 16:26:58,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:26:58,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 16:26:58,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:26:58,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:58,241 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:26:58,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:58,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949192502] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:26:58,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:26:58,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-17 16:26:58,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668683066] [2023-11-17 16:26:58,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:26:58,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 16:26:58,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:26:58,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 16:26:58,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2023-11-17 16:26:58,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:26:58,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 138 transitions, 1297 flow. Second operand has 25 states, 25 states have (on average 61.76) internal successors, (1544), 25 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:58,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:26:58,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:26:58,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:26:59,803 INFO L124 PetriNetUnfolderBase]: 523/1059 cut-off events. [2023-11-17 16:26:59,803 INFO L125 PetriNetUnfolderBase]: For 4113/4113 co-relation queries the response was YES. [2023-11-17 16:26:59,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5171 conditions, 1059 events. 523/1059 cut-off events. For 4113/4113 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6028 event pairs, 66 based on Foata normal form. 6/1059 useless extension candidates. Maximal degree in co-relation 5037. Up to 463 conditions per place. [2023-11-17 16:26:59,809 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 158 selfloop transitions, 132 changer transitions 40/330 dead transitions. [2023-11-17 16:26:59,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 330 transitions, 3158 flow [2023-11-17 16:26:59,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-17 16:26:59,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-17 16:26:59,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3172 transitions. [2023-11-17 16:26:59,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39714536121196947 [2023-11-17 16:26:59,828 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3172 transitions. [2023-11-17 16:26:59,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3172 transitions. [2023-11-17 16:26:59,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:26:59,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3172 transitions. [2023-11-17 16:26:59,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 64.73469387755102) internal successors, (3172), 49 states have internal predecessors, (3172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:59,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 163.0) internal successors, (8150), 50 states have internal predecessors, (8150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:59,843 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 163.0) internal successors, (8150), 50 states have internal predecessors, (8150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:59,843 INFO L175 Difference]: Start difference. First operand has 157 places, 138 transitions, 1297 flow. Second operand 49 states and 3172 transitions. [2023-11-17 16:26:59,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 330 transitions, 3158 flow [2023-11-17 16:26:59,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 330 transitions, 2882 flow, removed 35 selfloop flow, removed 28 redundant places. [2023-11-17 16:26:59,861 INFO L231 Difference]: Finished difference. Result has 190 places, 199 transitions, 2148 flow [2023-11-17 16:26:59,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=1104, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=2148, PETRI_PLACES=190, PETRI_TRANSITIONS=199} [2023-11-17 16:26:59,862 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 170 predicate places. [2023-11-17 16:26:59,862 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 199 transitions, 2148 flow [2023-11-17 16:26:59,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 61.76) internal successors, (1544), 25 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:59,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:26:59,863 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:26:59,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-17 16:27:00,084 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 [2023-11-17 16:27:00,084 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:00,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:00,085 INFO L85 PathProgramCache]: Analyzing trace with hash 2010544026, now seen corresponding path program 14 times [2023-11-17 16:27:00,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:00,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410840073] [2023-11-17 16:27:00,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:00,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:00,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:00,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:00,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:00,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410840073] [2023-11-17 16:27:00,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410840073] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:00,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092991749] [2023-11-17 16:27:00,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:27:00,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:00,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:00,252 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) [2023-11-17 16:27:00,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-17 16:27:00,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:27:00,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:27:00,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 16:27:00,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:00,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:00,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:00,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:00,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092991749] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:00,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:00,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-17 16:27:00,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836547155] [2023-11-17 16:27:00,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:00,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 16:27:00,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:00,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 16:27:00,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2023-11-17 16:27:00,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:27:00,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 199 transitions, 2148 flow. Second operand has 25 states, 25 states have (on average 61.76) internal successors, (1544), 25 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:00,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:00,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:27:00,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:01,741 INFO L124 PetriNetUnfolderBase]: 572/1166 cut-off events. [2023-11-17 16:27:01,742 INFO L125 PetriNetUnfolderBase]: For 9400/9400 co-relation queries the response was YES. [2023-11-17 16:27:01,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6609 conditions, 1166 events. 572/1166 cut-off events. For 9400/9400 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 6883 event pairs, 82 based on Foata normal form. 3/1169 useless extension candidates. Maximal degree in co-relation 6442. Up to 794 conditions per place. [2023-11-17 16:27:01,750 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 189 selfloop transitions, 108 changer transitions 15/312 dead transitions. [2023-11-17 16:27:01,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 312 transitions, 3523 flow [2023-11-17 16:27:01,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-17 16:27:01,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-17 16:27:01,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2076 transitions. [2023-11-17 16:27:01,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39800613496932513 [2023-11-17 16:27:01,753 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2076 transitions. [2023-11-17 16:27:01,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2076 transitions. [2023-11-17 16:27:01,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:01,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2076 transitions. [2023-11-17 16:27:01,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 64.875) internal successors, (2076), 32 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:01,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 163.0) internal successors, (5379), 33 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:01,759 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 163.0) internal successors, (5379), 33 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:01,759 INFO L175 Difference]: Start difference. First operand has 190 places, 199 transitions, 2148 flow. Second operand 32 states and 2076 transitions. [2023-11-17 16:27:01,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 312 transitions, 3523 flow [2023-11-17 16:27:01,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 312 transitions, 3031 flow, removed 213 selfloop flow, removed 19 redundant places. [2023-11-17 16:27:01,800 INFO L231 Difference]: Finished difference. Result has 209 places, 231 transitions, 2443 flow [2023-11-17 16:27:01,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=1738, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2443, PETRI_PLACES=209, PETRI_TRANSITIONS=231} [2023-11-17 16:27:01,801 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 189 predicate places. [2023-11-17 16:27:01,801 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 231 transitions, 2443 flow [2023-11-17 16:27:01,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 61.76) internal successors, (1544), 25 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:01,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:01,801 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:01,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-17 16:27:02,005 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 [2023-11-17 16:27:02,005 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:02,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:02,005 INFO L85 PathProgramCache]: Analyzing trace with hash 411724166, now seen corresponding path program 15 times [2023-11-17 16:27:02,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:02,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852761251] [2023-11-17 16:27:02,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:02,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:02,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:02,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:02,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:02,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852761251] [2023-11-17 16:27:02,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852761251] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:02,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548381618] [2023-11-17 16:27:02,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:27:02,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:02,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:02,140 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) [2023-11-17 16:27:02,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-17 16:27:02,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:27:02,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:27:02,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 16:27:02,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:02,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:02,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:02,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:02,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548381618] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:02,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:02,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-17 16:27:02,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498304791] [2023-11-17 16:27:02,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:02,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 16:27:02,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:02,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 16:27:02,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2023-11-17 16:27:02,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:27:02,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 231 transitions, 2443 flow. Second operand has 25 states, 25 states have (on average 61.76) internal successors, (1544), 25 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:02,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:02,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:27:02,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:03,204 INFO L124 PetriNetUnfolderBase]: 577/1180 cut-off events. [2023-11-17 16:27:03,204 INFO L125 PetriNetUnfolderBase]: For 7493/7493 co-relation queries the response was YES. [2023-11-17 16:27:03,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6398 conditions, 1180 events. 577/1180 cut-off events. For 7493/7493 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 6985 event pairs, 82 based on Foata normal form. 8/1186 useless extension candidates. Maximal degree in co-relation 6331. Up to 730 conditions per place. [2023-11-17 16:27:03,212 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 136 selfloop transitions, 97 changer transitions 61/294 dead transitions. [2023-11-17 16:27:03,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 294 transitions, 3309 flow [2023-11-17 16:27:03,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 16:27:03,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 16:27:03,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1673 transitions. [2023-11-17 16:27:03,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39476168003775364 [2023-11-17 16:27:03,214 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1673 transitions. [2023-11-17 16:27:03,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1673 transitions. [2023-11-17 16:27:03,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:03,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1673 transitions. [2023-11-17 16:27:03,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 64.34615384615384) internal successors, (1673), 26 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:03,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 163.0) internal successors, (4401), 27 states have internal predecessors, (4401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:03,219 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 163.0) internal successors, (4401), 27 states have internal predecessors, (4401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:03,219 INFO L175 Difference]: Start difference. First operand has 209 places, 231 transitions, 2443 flow. Second operand 26 states and 1673 transitions. [2023-11-17 16:27:03,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 294 transitions, 3309 flow [2023-11-17 16:27:03,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 294 transitions, 3064 flow, removed 78 selfloop flow, removed 15 redundant places. [2023-11-17 16:27:03,268 INFO L231 Difference]: Finished difference. Result has 223 places, 202 transitions, 2255 flow [2023-11-17 16:27:03,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=2198, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2255, PETRI_PLACES=223, PETRI_TRANSITIONS=202} [2023-11-17 16:27:03,284 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 203 predicate places. [2023-11-17 16:27:03,284 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 202 transitions, 2255 flow [2023-11-17 16:27:03,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 61.76) internal successors, (1544), 25 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:03,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:03,285 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:03,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-17 16:27:03,489 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 [2023-11-17 16:27:03,490 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:03,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:03,490 INFO L85 PathProgramCache]: Analyzing trace with hash 410534874, now seen corresponding path program 16 times [2023-11-17 16:27:03,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:03,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614485024] [2023-11-17 16:27:03,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:03,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:03,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:03,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:03,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614485024] [2023-11-17 16:27:03,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614485024] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:03,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962161601] [2023-11-17 16:27:03,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:27:03,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:03,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:03,649 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) [2023-11-17 16:27:03,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-17 16:27:03,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:27:03,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:27:03,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 16:27:03,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:03,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:03,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:04,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:04,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962161601] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:04,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:04,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-17 16:27:04,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95037437] [2023-11-17 16:27:04,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:04,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 16:27:04,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:04,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 16:27:04,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2023-11-17 16:27:04,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:27:04,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 202 transitions, 2255 flow. Second operand has 25 states, 25 states have (on average 61.76) internal successors, (1544), 25 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:04,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:04,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:27:04,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:04,724 INFO L124 PetriNetUnfolderBase]: 514/1031 cut-off events. [2023-11-17 16:27:04,724 INFO L125 PetriNetUnfolderBase]: For 7682/7682 co-relation queries the response was YES. [2023-11-17 16:27:04,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5905 conditions, 1031 events. 514/1031 cut-off events. For 7682/7682 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5798 event pairs, 80 based on Foata normal form. 4/1035 useless extension candidates. Maximal degree in co-relation 5836. Up to 589 conditions per place. [2023-11-17 16:27:04,732 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 132 selfloop transitions, 116 changer transitions 22/270 dead transitions. [2023-11-17 16:27:04,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 270 transitions, 3061 flow [2023-11-17 16:27:04,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-17 16:27:04,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-17 16:27:04,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1944 transitions. [2023-11-17 16:27:04,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39754601226993863 [2023-11-17 16:27:04,734 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1944 transitions. [2023-11-17 16:27:04,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1944 transitions. [2023-11-17 16:27:04,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:04,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1944 transitions. [2023-11-17 16:27:04,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 64.8) internal successors, (1944), 30 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:04,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 163.0) internal successors, (5053), 31 states have internal predecessors, (5053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:04,739 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 163.0) internal successors, (5053), 31 states have internal predecessors, (5053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:04,739 INFO L175 Difference]: Start difference. First operand has 223 places, 202 transitions, 2255 flow. Second operand 30 states and 1944 transitions. [2023-11-17 16:27:04,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 270 transitions, 3061 flow [2023-11-17 16:27:04,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 270 transitions, 2774 flow, removed 51 selfloop flow, removed 30 redundant places. [2023-11-17 16:27:04,772 INFO L231 Difference]: Finished difference. Result has 198 places, 196 transitions, 2198 flow [2023-11-17 16:27:04,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=1975, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2198, PETRI_PLACES=198, PETRI_TRANSITIONS=196} [2023-11-17 16:27:04,773 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 178 predicate places. [2023-11-17 16:27:04,773 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 196 transitions, 2198 flow [2023-11-17 16:27:04,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 61.76) internal successors, (1544), 25 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:04,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:04,773 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:04,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-17 16:27:04,977 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 [2023-11-17 16:27:04,977 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:04,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:04,978 INFO L85 PathProgramCache]: Analyzing trace with hash -968589448, now seen corresponding path program 17 times [2023-11-17 16:27:04,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:04,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301808998] [2023-11-17 16:27:04,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:04,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:04,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:05,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:05,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:05,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301808998] [2023-11-17 16:27:05,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301808998] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:05,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52397336] [2023-11-17 16:27:05,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:27:05,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:05,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:05,116 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) [2023-11-17 16:27:05,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-17 16:27:05,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:27:05,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:27:05,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 16:27:05,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:05,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:05,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:05,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:05,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52397336] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:05,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:05,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-17 16:27:05,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665766831] [2023-11-17 16:27:05,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:05,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 16:27:05,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:05,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 16:27:05,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2023-11-17 16:27:05,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:27:05,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 196 transitions, 2198 flow. Second operand has 25 states, 25 states have (on average 61.8) internal successors, (1545), 25 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:05,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:05,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:27:05,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:06,261 INFO L124 PetriNetUnfolderBase]: 531/1059 cut-off events. [2023-11-17 16:27:06,262 INFO L125 PetriNetUnfolderBase]: For 6989/6989 co-relation queries the response was YES. [2023-11-17 16:27:06,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6139 conditions, 1059 events. 531/1059 cut-off events. For 6989/6989 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5901 event pairs, 92 based on Foata normal form. 3/1062 useless extension candidates. Maximal degree in co-relation 6052. Up to 829 conditions per place. [2023-11-17 16:27:06,268 INFO L140 encePairwiseOnDemand]: 154/163 looper letters, 199 selfloop transitions, 43 changer transitions 18/260 dead transitions. [2023-11-17 16:27:06,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 260 transitions, 3122 flow [2023-11-17 16:27:06,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 16:27:06,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 16:27:06,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1305 transitions. [2023-11-17 16:27:06,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4003067484662577 [2023-11-17 16:27:06,270 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1305 transitions. [2023-11-17 16:27:06,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1305 transitions. [2023-11-17 16:27:06,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:06,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1305 transitions. [2023-11-17 16:27:06,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 65.25) internal successors, (1305), 20 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:06,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 163.0) internal successors, (3423), 21 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:06,273 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 163.0) internal successors, (3423), 21 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:06,273 INFO L175 Difference]: Start difference. First operand has 198 places, 196 transitions, 2198 flow. Second operand 20 states and 1305 transitions. [2023-11-17 16:27:06,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 260 transitions, 3122 flow [2023-11-17 16:27:06,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 260 transitions, 2788 flow, removed 34 selfloop flow, removed 27 redundant places. [2023-11-17 16:27:06,300 INFO L231 Difference]: Finished difference. Result has 195 places, 201 transitions, 2096 flow [2023-11-17 16:27:06,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=1882, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2096, PETRI_PLACES=195, PETRI_TRANSITIONS=201} [2023-11-17 16:27:06,301 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 175 predicate places. [2023-11-17 16:27:06,301 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 201 transitions, 2096 flow [2023-11-17 16:27:06,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 61.8) internal successors, (1545), 25 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:06,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:06,301 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:06,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-17 16:27:06,505 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 [2023-11-17 16:27:06,506 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:06,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:06,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1832419960, now seen corresponding path program 18 times [2023-11-17 16:27:06,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:06,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435074977] [2023-11-17 16:27:06,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:06,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:06,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:06,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:06,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:06,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435074977] [2023-11-17 16:27:06,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435074977] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:06,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159704121] [2023-11-17 16:27:06,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:27:06,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:06,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:06,649 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) [2023-11-17 16:27:06,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-17 16:27:06,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:27:06,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:27:06,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 16:27:06,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:06,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:07,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159704121] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:07,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:07,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-17 16:27:07,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661620788] [2023-11-17 16:27:07,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:07,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 16:27:07,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:07,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 16:27:07,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2023-11-17 16:27:07,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:27:07,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 201 transitions, 2096 flow. Second operand has 25 states, 25 states have (on average 61.76) internal successors, (1544), 25 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:07,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:07,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:27:07,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:07,831 INFO L124 PetriNetUnfolderBase]: 609/1234 cut-off events. [2023-11-17 16:27:07,832 INFO L125 PetriNetUnfolderBase]: For 12649/12649 co-relation queries the response was YES. [2023-11-17 16:27:07,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7370 conditions, 1234 events. 609/1234 cut-off events. For 12649/12649 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 7285 event pairs, 100 based on Foata normal form. 4/1234 useless extension candidates. Maximal degree in co-relation 7240. Up to 877 conditions per place. [2023-11-17 16:27:07,840 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 223 selfloop transitions, 78 changer transitions 17/318 dead transitions. [2023-11-17 16:27:07,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 318 transitions, 3702 flow [2023-11-17 16:27:07,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-17 16:27:07,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-17 16:27:07,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1823 transitions. [2023-11-17 16:27:07,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39943032427695 [2023-11-17 16:27:07,842 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1823 transitions. [2023-11-17 16:27:07,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1823 transitions. [2023-11-17 16:27:07,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:07,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1823 transitions. [2023-11-17 16:27:07,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 65.10714285714286) internal successors, (1823), 28 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:07,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 163.0) internal successors, (4727), 29 states have internal predecessors, (4727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:07,846 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 163.0) internal successors, (4727), 29 states have internal predecessors, (4727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:07,846 INFO L175 Difference]: Start difference. First operand has 195 places, 201 transitions, 2096 flow. Second operand 28 states and 1823 transitions. [2023-11-17 16:27:07,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 318 transitions, 3702 flow [2023-11-17 16:27:07,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 318 transitions, 3457 flow, removed 64 selfloop flow, removed 18 redundant places. [2023-11-17 16:27:07,918 INFO L231 Difference]: Finished difference. Result has 214 places, 238 transitions, 2797 flow [2023-11-17 16:27:07,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=1911, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2797, PETRI_PLACES=214, PETRI_TRANSITIONS=238} [2023-11-17 16:27:07,918 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 194 predicate places. [2023-11-17 16:27:07,918 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 238 transitions, 2797 flow [2023-11-17 16:27:07,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 61.76) internal successors, (1544), 25 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:07,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:07,919 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:07,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-17 16:27:08,123 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 [2023-11-17 16:27:08,123 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:08,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:08,124 INFO L85 PathProgramCache]: Analyzing trace with hash -939370134, now seen corresponding path program 19 times [2023-11-17 16:27:08,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:08,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573281741] [2023-11-17 16:27:08,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:08,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:08,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:08,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:08,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:08,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573281741] [2023-11-17 16:27:08,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573281741] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:08,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788283608] [2023-11-17 16:27:08,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:27:08,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:08,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:08,266 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) [2023-11-17 16:27:08,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-17 16:27:08,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:08,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 16:27:08,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:08,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:08,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:08,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:08,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788283608] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:08,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:08,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-17 16:27:08,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534855799] [2023-11-17 16:27:08,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:08,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 16:27:08,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:08,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 16:27:08,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2023-11-17 16:27:08,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:27:08,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 238 transitions, 2797 flow. Second operand has 25 states, 25 states have (on average 61.84) internal successors, (1546), 25 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:08,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:08,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:27:08,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:09,660 INFO L124 PetriNetUnfolderBase]: 657/1319 cut-off events. [2023-11-17 16:27:09,661 INFO L125 PetriNetUnfolderBase]: For 17148/17148 co-relation queries the response was YES. [2023-11-17 16:27:09,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8581 conditions, 1319 events. 657/1319 cut-off events. For 17148/17148 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7823 event pairs, 108 based on Foata normal form. 3/1318 useless extension candidates. Maximal degree in co-relation 8445. Up to 1055 conditions per place. [2023-11-17 16:27:09,668 INFO L140 encePairwiseOnDemand]: 154/163 looper letters, 251 selfloop transitions, 57 changer transitions 17/325 dead transitions. [2023-11-17 16:27:09,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 325 transitions, 4167 flow [2023-11-17 16:27:09,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 16:27:09,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 16:27:09,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1695 transitions. [2023-11-17 16:27:09,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39995280792826804 [2023-11-17 16:27:09,672 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1695 transitions. [2023-11-17 16:27:09,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1695 transitions. [2023-11-17 16:27:09,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:09,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1695 transitions. [2023-11-17 16:27:09,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 65.1923076923077) internal successors, (1695), 26 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:09,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 163.0) internal successors, (4401), 27 states have internal predecessors, (4401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:09,676 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 163.0) internal successors, (4401), 27 states have internal predecessors, (4401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:09,676 INFO L175 Difference]: Start difference. First operand has 214 places, 238 transitions, 2797 flow. Second operand 26 states and 1695 transitions. [2023-11-17 16:27:09,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 325 transitions, 4167 flow [2023-11-17 16:27:09,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 325 transitions, 3551 flow, removed 272 selfloop flow, removed 14 redundant places. [2023-11-17 16:27:09,735 INFO L231 Difference]: Finished difference. Result has 230 places, 249 transitions, 2658 flow [2023-11-17 16:27:09,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=2297, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2658, PETRI_PLACES=230, PETRI_TRANSITIONS=249} [2023-11-17 16:27:09,735 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 210 predicate places. [2023-11-17 16:27:09,735 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 249 transitions, 2658 flow [2023-11-17 16:27:09,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 61.84) internal successors, (1546), 25 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:09,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:09,736 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:09,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-17 16:27:09,940 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 [2023-11-17 16:27:09,940 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:09,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:09,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1755588010, now seen corresponding path program 20 times [2023-11-17 16:27:09,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:09,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446300755] [2023-11-17 16:27:09,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:09,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:10,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:10,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:10,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446300755] [2023-11-17 16:27:10,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446300755] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:10,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252553928] [2023-11-17 16:27:10,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:27:10,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:10,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:10,102 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) [2023-11-17 16:27:10,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-17 16:27:10,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:27:10,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:27:10,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 16:27:10,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:10,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:10,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:10,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252553928] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:10,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:10,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-17 16:27:10,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59202720] [2023-11-17 16:27:10,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:10,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 16:27:10,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:10,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 16:27:10,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2023-11-17 16:27:10,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:27:10,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 249 transitions, 2658 flow. Second operand has 25 states, 25 states have (on average 61.84) internal successors, (1546), 25 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:10,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:10,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:27:10,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:11,638 INFO L124 PetriNetUnfolderBase]: 683/1387 cut-off events. [2023-11-17 16:27:11,639 INFO L125 PetriNetUnfolderBase]: For 14274/14274 co-relation queries the response was YES. [2023-11-17 16:27:11,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8306 conditions, 1387 events. 683/1387 cut-off events. For 14274/14274 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 8406 event pairs, 116 based on Foata normal form. 6/1381 useless extension candidates. Maximal degree in co-relation 8237. Up to 966 conditions per place. [2023-11-17 16:27:11,647 INFO L140 encePairwiseOnDemand]: 154/163 looper letters, 239 selfloop transitions, 89 changer transitions 29/357 dead transitions. [2023-11-17 16:27:11,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 357 transitions, 4001 flow [2023-11-17 16:27:11,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-17 16:27:11,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-11-17 16:27:11,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2695 transitions. [2023-11-17 16:27:11,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3936605316973415 [2023-11-17 16:27:11,649 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2695 transitions. [2023-11-17 16:27:11,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2695 transitions. [2023-11-17 16:27:11,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:11,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2695 transitions. [2023-11-17 16:27:11,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 64.16666666666667) internal successors, (2695), 42 states have internal predecessors, (2695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:11,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 163.0) internal successors, (7009), 43 states have internal predecessors, (7009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:11,655 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 163.0) internal successors, (7009), 43 states have internal predecessors, (7009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:11,655 INFO L175 Difference]: Start difference. First operand has 230 places, 249 transitions, 2658 flow. Second operand 42 states and 2695 transitions. [2023-11-17 16:27:11,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 357 transitions, 4001 flow [2023-11-17 16:27:11,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 357 transitions, 3844 flow, removed 47 selfloop flow, removed 13 redundant places. [2023-11-17 16:27:11,708 INFO L231 Difference]: Finished difference. Result has 267 places, 261 transitions, 2927 flow [2023-11-17 16:27:11,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=2492, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=2927, PETRI_PLACES=267, PETRI_TRANSITIONS=261} [2023-11-17 16:27:11,708 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 247 predicate places. [2023-11-17 16:27:11,709 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 261 transitions, 2927 flow [2023-11-17 16:27:11,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 61.84) internal successors, (1546), 25 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:11,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:11,709 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:11,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-17 16:27:11,911 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 [2023-11-17 16:27:11,911 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:11,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:11,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1833609252, now seen corresponding path program 21 times [2023-11-17 16:27:11,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:11,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344758883] [2023-11-17 16:27:11,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:11,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:11,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:12,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:12,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:12,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344758883] [2023-11-17 16:27:12,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344758883] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:12,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472018108] [2023-11-17 16:27:12,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:27:12,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:12,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:12,021 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) [2023-11-17 16:27:12,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-17 16:27:12,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:27:12,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:27:12,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 16:27:12,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:12,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:12,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:12,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:12,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472018108] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:12,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:12,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-17 16:27:12,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378462200] [2023-11-17 16:27:12,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:12,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 16:27:12,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:12,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 16:27:12,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2023-11-17 16:27:12,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:27:12,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 261 transitions, 2927 flow. Second operand has 25 states, 25 states have (on average 61.76) internal successors, (1544), 25 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:12,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:12,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:27:12,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:12,921 INFO L124 PetriNetUnfolderBase]: 658/1332 cut-off events. [2023-11-17 16:27:12,921 INFO L125 PetriNetUnfolderBase]: For 15866/15866 co-relation queries the response was YES. [2023-11-17 16:27:12,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8282 conditions, 1332 events. 658/1332 cut-off events. For 15866/15866 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 7982 event pairs, 122 based on Foata normal form. 5/1327 useless extension candidates. Maximal degree in co-relation 8200. Up to 1101 conditions per place. [2023-11-17 16:27:12,928 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 213 selfloop transitions, 43 changer transitions 43/299 dead transitions. [2023-11-17 16:27:12,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 299 transitions, 3669 flow [2023-11-17 16:27:12,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 16:27:12,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 16:27:12,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1282 transitions. [2023-11-17 16:27:12,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932515337423313 [2023-11-17 16:27:12,954 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1282 transitions. [2023-11-17 16:27:12,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1282 transitions. [2023-11-17 16:27:12,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:12,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1282 transitions. [2023-11-17 16:27:12,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 64.1) internal successors, (1282), 20 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:12,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 163.0) internal successors, (3423), 21 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:12,957 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 163.0) internal successors, (3423), 21 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:12,957 INFO L175 Difference]: Start difference. First operand has 267 places, 261 transitions, 2927 flow. Second operand 20 states and 1282 transitions. [2023-11-17 16:27:12,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 299 transitions, 3669 flow [2023-11-17 16:27:13,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 299 transitions, 3373 flow, removed 87 selfloop flow, removed 21 redundant places. [2023-11-17 16:27:13,025 INFO L231 Difference]: Finished difference. Result has 258 places, 237 transitions, 2494 flow [2023-11-17 16:27:13,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=2628, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2494, PETRI_PLACES=258, PETRI_TRANSITIONS=237} [2023-11-17 16:27:13,026 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 238 predicate places. [2023-11-17 16:27:13,026 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 237 transitions, 2494 flow [2023-11-17 16:27:13,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 61.76) internal successors, (1544), 25 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:13,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:13,026 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:13,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-17 16:27:13,231 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 [2023-11-17 16:27:13,231 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:13,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:13,231 INFO L85 PathProgramCache]: Analyzing trace with hash 682258594, now seen corresponding path program 22 times [2023-11-17 16:27:13,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:13,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488142873] [2023-11-17 16:27:13,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:13,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:13,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:13,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:13,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:13,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488142873] [2023-11-17 16:27:13,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488142873] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:13,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325185556] [2023-11-17 16:27:13,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:27:13,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:13,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:13,377 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) [2023-11-17 16:27:13,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-17 16:27:13,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:27:13,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:27:13,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 16:27:13,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:13,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:13,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:13,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325185556] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:13,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:13,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-17 16:27:13,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612180671] [2023-11-17 16:27:13,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:13,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 16:27:13,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:13,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 16:27:13,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2023-11-17 16:27:13,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:27:13,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 237 transitions, 2494 flow. Second operand has 26 states, 26 states have (on average 61.65384615384615) internal successors, (1603), 26 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:13,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:13,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:27:13,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:14,169 INFO L124 PetriNetUnfolderBase]: 667/1320 cut-off events. [2023-11-17 16:27:14,169 INFO L125 PetriNetUnfolderBase]: For 16549/16549 co-relation queries the response was YES. [2023-11-17 16:27:14,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8295 conditions, 1320 events. 667/1320 cut-off events. For 16549/16549 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 7798 event pairs, 36 based on Foata normal form. 4/1314 useless extension candidates. Maximal degree in co-relation 8215. Up to 464 conditions per place. [2023-11-17 16:27:14,192 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 139 selfloop transitions, 134 changer transitions 45/318 dead transitions. [2023-11-17 16:27:14,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 318 transitions, 3738 flow [2023-11-17 16:27:14,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 16:27:14,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 16:27:14,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1444 transitions. [2023-11-17 16:27:14,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4026770775237033 [2023-11-17 16:27:14,206 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1444 transitions. [2023-11-17 16:27:14,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1444 transitions. [2023-11-17 16:27:14,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:14,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1444 transitions. [2023-11-17 16:27:14,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 65.63636363636364) internal successors, (1444), 22 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:14,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 163.0) internal successors, (3749), 23 states have internal predecessors, (3749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:14,209 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 163.0) internal successors, (3749), 23 states have internal predecessors, (3749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:14,209 INFO L175 Difference]: Start difference. First operand has 258 places, 237 transitions, 2494 flow. Second operand 22 states and 1444 transitions. [2023-11-17 16:27:14,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 318 transitions, 3738 flow [2023-11-17 16:27:14,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 318 transitions, 3539 flow, removed 47 selfloop flow, removed 19 redundant places. [2023-11-17 16:27:14,266 INFO L231 Difference]: Finished difference. Result has 247 places, 239 transitions, 2819 flow [2023-11-17 16:27:14,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=2321, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2819, PETRI_PLACES=247, PETRI_TRANSITIONS=239} [2023-11-17 16:27:14,266 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 227 predicate places. [2023-11-17 16:27:14,266 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 239 transitions, 2819 flow [2023-11-17 16:27:14,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 61.65384615384615) internal successors, (1603), 26 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:14,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:14,267 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:14,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-17 16:27:14,471 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 [2023-11-17 16:27:14,472 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:14,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:14,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1323575096, now seen corresponding path program 23 times [2023-11-17 16:27:14,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:14,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961941758] [2023-11-17 16:27:14,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:14,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:14,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:14,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:14,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:14,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961941758] [2023-11-17 16:27:14,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961941758] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:14,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175608531] [2023-11-17 16:27:14,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:27:14,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:14,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:14,612 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) [2023-11-17 16:27:14,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-17 16:27:14,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:27:14,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:27:14,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 16:27:14,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:14,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:14,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:14,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:14,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175608531] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:14,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:14,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-17 16:27:14,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509739995] [2023-11-17 16:27:14,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:14,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 16:27:14,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:14,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 16:27:14,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2023-11-17 16:27:14,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:27:14,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 239 transitions, 2819 flow. Second operand has 26 states, 26 states have (on average 61.65384615384615) internal successors, (1603), 26 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:14,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:14,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:27:14,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:15,419 INFO L124 PetriNetUnfolderBase]: 673/1330 cut-off events. [2023-11-17 16:27:15,419 INFO L125 PetriNetUnfolderBase]: For 22470/22470 co-relation queries the response was YES. [2023-11-17 16:27:15,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9460 conditions, 1330 events. 673/1330 cut-off events. For 22470/22470 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 7943 event pairs, 28 based on Foata normal form. 3/1329 useless extension candidates. Maximal degree in co-relation 9379. Up to 452 conditions per place. [2023-11-17 16:27:15,428 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 137 selfloop transitions, 135 changer transitions 49/321 dead transitions. [2023-11-17 16:27:15,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 321 transitions, 4247 flow [2023-11-17 16:27:15,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-17 16:27:15,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-17 16:27:15,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1634 transitions. [2023-11-17 16:27:15,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4009815950920245 [2023-11-17 16:27:15,430 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1634 transitions. [2023-11-17 16:27:15,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1634 transitions. [2023-11-17 16:27:15,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:15,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1634 transitions. [2023-11-17 16:27:15,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 65.36) internal successors, (1634), 25 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:15,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 163.0) internal successors, (4238), 26 states have internal predecessors, (4238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:15,434 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 163.0) internal successors, (4238), 26 states have internal predecessors, (4238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:15,434 INFO L175 Difference]: Start difference. First operand has 247 places, 239 transitions, 2819 flow. Second operand 25 states and 1634 transitions. [2023-11-17 16:27:15,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 321 transitions, 4247 flow [2023-11-17 16:27:15,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 321 transitions, 3971 flow, removed 80 selfloop flow, removed 16 redundant places. [2023-11-17 16:27:15,512 INFO L231 Difference]: Finished difference. Result has 251 places, 229 transitions, 2938 flow [2023-11-17 16:27:15,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=2639, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2938, PETRI_PLACES=251, PETRI_TRANSITIONS=229} [2023-11-17 16:27:15,513 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 231 predicate places. [2023-11-17 16:27:15,513 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 229 transitions, 2938 flow [2023-11-17 16:27:15,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 61.65384615384615) internal successors, (1603), 26 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:15,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:15,513 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:15,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-17 16:27:15,717 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 [2023-11-17 16:27:15,718 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:15,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:15,718 INFO L85 PathProgramCache]: Analyzing trace with hash -169319422, now seen corresponding path program 24 times [2023-11-17 16:27:15,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:15,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327682031] [2023-11-17 16:27:15,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:15,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:15,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:15,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:15,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:15,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327682031] [2023-11-17 16:27:15,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327682031] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:15,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545066126] [2023-11-17 16:27:15,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:27:15,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:15,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:15,868 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) [2023-11-17 16:27:15,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-17 16:27:15,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 16:27:15,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:27:15,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 16:27:15,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:16,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:16,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:16,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545066126] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:16,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:16,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-17 16:27:16,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144259204] [2023-11-17 16:27:16,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:16,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 16:27:16,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:16,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 16:27:16,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2023-11-17 16:27:16,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:27:16,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 229 transitions, 2938 flow. Second operand has 26 states, 26 states have (on average 61.65384615384615) internal successors, (1603), 26 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:16,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:16,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:27:16,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:16,786 INFO L124 PetriNetUnfolderBase]: 691/1389 cut-off events. [2023-11-17 16:27:16,787 INFO L125 PetriNetUnfolderBase]: For 28329/28329 co-relation queries the response was YES. [2023-11-17 16:27:16,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10682 conditions, 1389 events. 691/1389 cut-off events. For 28329/28329 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 8490 event pairs, 22 based on Foata normal form. 4/1391 useless extension candidates. Maximal degree in co-relation 10602. Up to 489 conditions per place. [2023-11-17 16:27:16,796 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 149 selfloop transitions, 127 changer transitions 57/333 dead transitions. [2023-11-17 16:27:16,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 333 transitions, 4671 flow [2023-11-17 16:27:16,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-17 16:27:16,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-17 16:27:16,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1640 transitions. [2023-11-17 16:27:16,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40245398773006136 [2023-11-17 16:27:16,798 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1640 transitions. [2023-11-17 16:27:16,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1640 transitions. [2023-11-17 16:27:16,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:16,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1640 transitions. [2023-11-17 16:27:16,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 65.6) internal successors, (1640), 25 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:16,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 163.0) internal successors, (4238), 26 states have internal predecessors, (4238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:16,802 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 163.0) internal successors, (4238), 26 states have internal predecessors, (4238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:16,802 INFO L175 Difference]: Start difference. First operand has 251 places, 229 transitions, 2938 flow. Second operand 25 states and 1640 transitions. [2023-11-17 16:27:16,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 333 transitions, 4671 flow [2023-11-17 16:27:16,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 333 transitions, 4171 flow, removed 75 selfloop flow, removed 25 redundant places. [2023-11-17 16:27:16,886 INFO L231 Difference]: Finished difference. Result has 245 places, 225 transitions, 2902 flow [2023-11-17 16:27:16,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=2535, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2902, PETRI_PLACES=245, PETRI_TRANSITIONS=225} [2023-11-17 16:27:16,886 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 225 predicate places. [2023-11-17 16:27:16,886 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 225 transitions, 2902 flow [2023-11-17 16:27:16,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 61.65384615384615) internal successors, (1603), 26 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:16,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:16,887 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:16,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-17 16:27:17,092 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 [2023-11-17 16:27:17,092 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:17,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:17,092 INFO L85 PathProgramCache]: Analyzing trace with hash -186046214, now seen corresponding path program 25 times [2023-11-17 16:27:17,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:17,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577473706] [2023-11-17 16:27:17,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:17,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:17,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:17,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:17,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577473706] [2023-11-17 16:27:17,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577473706] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:17,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390281271] [2023-11-17 16:27:17,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:27:17,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:17,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:17,224 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) [2023-11-17 16:27:17,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-17 16:27:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:17,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 16:27:17,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:17,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:17,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:17,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:17,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390281271] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:17,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:17,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-17 16:27:17,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27090017] [2023-11-17 16:27:17,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:17,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 16:27:17,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:17,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 16:27:17,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2023-11-17 16:27:17,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:27:17,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 225 transitions, 2902 flow. Second operand has 26 states, 26 states have (on average 61.61538461538461) internal successors, (1602), 26 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:17,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:17,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:27:17,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:18,063 INFO L124 PetriNetUnfolderBase]: 614/1278 cut-off events. [2023-11-17 16:27:18,064 INFO L125 PetriNetUnfolderBase]: For 24273/24273 co-relation queries the response was YES. [2023-11-17 16:27:18,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9598 conditions, 1278 events. 614/1278 cut-off events. For 24273/24273 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 7810 event pairs, 38 based on Foata normal form. 3/1279 useless extension candidates. Maximal degree in co-relation 9518. Up to 433 conditions per place. [2023-11-17 16:27:18,072 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 158 selfloop transitions, 137 changer transitions 18/313 dead transitions. [2023-11-17 16:27:18,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 313 transitions, 4372 flow [2023-11-17 16:27:18,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 16:27:18,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 16:27:18,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1700 transitions. [2023-11-17 16:27:18,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011326097215668 [2023-11-17 16:27:18,094 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1700 transitions. [2023-11-17 16:27:18,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1700 transitions. [2023-11-17 16:27:18,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:18,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1700 transitions. [2023-11-17 16:27:18,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 65.38461538461539) internal successors, (1700), 26 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:18,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 163.0) internal successors, (4401), 27 states have internal predecessors, (4401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:18,098 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 163.0) internal successors, (4401), 27 states have internal predecessors, (4401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:18,098 INFO L175 Difference]: Start difference. First operand has 245 places, 225 transitions, 2902 flow. Second operand 26 states and 1700 transitions. [2023-11-17 16:27:18,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 313 transitions, 4372 flow [2023-11-17 16:27:18,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 313 transitions, 3997 flow, removed 91 selfloop flow, removed 21 redundant places. [2023-11-17 16:27:18,172 INFO L231 Difference]: Finished difference. Result has 249 places, 232 transitions, 3159 flow [2023-11-17 16:27:18,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=2633, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3159, PETRI_PLACES=249, PETRI_TRANSITIONS=232} [2023-11-17 16:27:18,172 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 229 predicate places. [2023-11-17 16:27:18,172 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 232 transitions, 3159 flow [2023-11-17 16:27:18,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 61.61538461538461) internal successors, (1602), 26 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:18,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:18,173 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:18,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-17 16:27:18,378 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 [2023-11-17 16:27:18,378 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:18,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:18,378 INFO L85 PathProgramCache]: Analyzing trace with hash -55253418, now seen corresponding path program 26 times [2023-11-17 16:27:18,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:18,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548877712] [2023-11-17 16:27:18,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:18,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:18,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:18,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:18,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548877712] [2023-11-17 16:27:18,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548877712] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:18,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381222821] [2023-11-17 16:27:18,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:27:18,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:18,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:18,518 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) [2023-11-17 16:27:18,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-17 16:27:18,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:27:18,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:27:18,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 16:27:18,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:18,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:18,689 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:18,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:18,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381222821] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:18,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:18,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-17 16:27:18,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436915245] [2023-11-17 16:27:18,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:18,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 16:27:18,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:18,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 16:27:18,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2023-11-17 16:27:18,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:27:18,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 232 transitions, 3159 flow. Second operand has 26 states, 26 states have (on average 61.57692307692308) internal successors, (1601), 26 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:18,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:18,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:27:18,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:19,539 INFO L124 PetriNetUnfolderBase]: 580/1201 cut-off events. [2023-11-17 16:27:19,539 INFO L125 PetriNetUnfolderBase]: For 18786/18786 co-relation queries the response was YES. [2023-11-17 16:27:19,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8919 conditions, 1201 events. 580/1201 cut-off events. For 18786/18786 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 7188 event pairs, 40 based on Foata normal form. 4/1203 useless extension candidates. Maximal degree in co-relation 8836. Up to 433 conditions per place. [2023-11-17 16:27:19,547 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 137 selfloop transitions, 146 changer transitions 21/304 dead transitions. [2023-11-17 16:27:19,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 304 transitions, 4312 flow [2023-11-17 16:27:19,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 16:27:19,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 16:27:19,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1690 transitions. [2023-11-17 16:27:19,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3987730061349693 [2023-11-17 16:27:19,548 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1690 transitions. [2023-11-17 16:27:19,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1690 transitions. [2023-11-17 16:27:19,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:19,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1690 transitions. [2023-11-17 16:27:19,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 65.0) internal successors, (1690), 26 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:19,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 163.0) internal successors, (4401), 27 states have internal predecessors, (4401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:19,552 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 163.0) internal successors, (4401), 27 states have internal predecessors, (4401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:19,552 INFO L175 Difference]: Start difference. First operand has 249 places, 232 transitions, 3159 flow. Second operand 26 states and 1690 transitions. [2023-11-17 16:27:19,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 304 transitions, 4312 flow [2023-11-17 16:27:19,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 304 transitions, 3949 flow, removed 67 selfloop flow, removed 19 redundant places. [2023-11-17 16:27:19,616 INFO L231 Difference]: Finished difference. Result has 258 places, 235 transitions, 3274 flow [2023-11-17 16:27:19,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=2850, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3274, PETRI_PLACES=258, PETRI_TRANSITIONS=235} [2023-11-17 16:27:19,617 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 238 predicate places. [2023-11-17 16:27:19,617 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 235 transitions, 3274 flow [2023-11-17 16:27:19,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 61.57692307692308) internal successors, (1601), 26 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:19,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:19,617 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:19,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-17 16:27:19,821 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 [2023-11-17 16:27:19,822 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:19,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:19,822 INFO L85 PathProgramCache]: Analyzing trace with hash -2002761160, now seen corresponding path program 27 times [2023-11-17 16:27:19,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:19,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113049834] [2023-11-17 16:27:19,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:19,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:19,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:19,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:19,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:19,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113049834] [2023-11-17 16:27:19,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113049834] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:19,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770874506] [2023-11-17 16:27:19,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:27:19,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:19,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:19,960 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) [2023-11-17 16:27:19,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-17 16:27:20,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:27:20,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:27:20,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 16:27:20,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:20,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:20,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:20,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770874506] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:20,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:20,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2023-11-17 16:27:20,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991246543] [2023-11-17 16:27:20,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:20,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 16:27:20,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:20,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 16:27:20,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2023-11-17 16:27:20,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:27:20,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 235 transitions, 3274 flow. Second operand has 25 states, 25 states have (on average 61.68) internal successors, (1542), 25 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:20,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:20,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:27:20,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:21,076 INFO L124 PetriNetUnfolderBase]: 650/1311 cut-off events. [2023-11-17 16:27:21,076 INFO L125 PetriNetUnfolderBase]: For 27219/27219 co-relation queries the response was YES. [2023-11-17 16:27:21,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10347 conditions, 1311 events. 650/1311 cut-off events. For 27219/27219 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 7833 event pairs, 42 based on Foata normal form. 6/1313 useless extension candidates. Maximal degree in co-relation 10262. Up to 459 conditions per place. [2023-11-17 16:27:21,086 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 183 selfloop transitions, 169 changer transitions 15/367 dead transitions. [2023-11-17 16:27:21,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 367 transitions, 5643 flow [2023-11-17 16:27:21,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-17 16:27:21,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-17 16:27:21,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2321 transitions. [2023-11-17 16:27:21,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39553510565780503 [2023-11-17 16:27:21,111 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2321 transitions. [2023-11-17 16:27:21,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2321 transitions. [2023-11-17 16:27:21,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:21,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2321 transitions. [2023-11-17 16:27:21,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 64.47222222222223) internal successors, (2321), 36 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:21,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 163.0) internal successors, (6031), 37 states have internal predecessors, (6031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:21,126 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 163.0) internal successors, (6031), 37 states have internal predecessors, (6031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:21,127 INFO L175 Difference]: Start difference. First operand has 258 places, 235 transitions, 3274 flow. Second operand 36 states and 2321 transitions. [2023-11-17 16:27:21,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 367 transitions, 5643 flow [2023-11-17 16:27:21,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 367 transitions, 5085 flow, removed 141 selfloop flow, removed 25 redundant places. [2023-11-17 16:27:21,215 INFO L231 Difference]: Finished difference. Result has 269 places, 278 transitions, 4320 flow [2023-11-17 16:27:21,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=2899, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=4320, PETRI_PLACES=269, PETRI_TRANSITIONS=278} [2023-11-17 16:27:21,216 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 249 predicate places. [2023-11-17 16:27:21,216 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 278 transitions, 4320 flow [2023-11-17 16:27:21,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 61.68) internal successors, (1542), 25 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:21,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:21,216 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:21,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-17 16:27:21,420 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 [2023-11-17 16:27:21,421 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:21,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:21,421 INFO L85 PathProgramCache]: Analyzing trace with hash -185074078, now seen corresponding path program 28 times [2023-11-17 16:27:21,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:21,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475956488] [2023-11-17 16:27:21,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:21,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:21,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:21,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:21,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:21,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475956488] [2023-11-17 16:27:21,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475956488] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:21,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907139343] [2023-11-17 16:27:21,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:27:21,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:21,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:21,558 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) [2023-11-17 16:27:21,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-17 16:27:21,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:27:21,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:27:21,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 16:27:21,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:21,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:21,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:21,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:21,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907139343] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:21,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:21,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-17 16:27:21,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159468096] [2023-11-17 16:27:21,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:21,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 16:27:21,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:21,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 16:27:21,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2023-11-17 16:27:21,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:27:21,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 278 transitions, 4320 flow. Second operand has 26 states, 26 states have (on average 61.65384615384615) internal successors, (1603), 26 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:21,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:21,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:27:21,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:22,470 INFO L124 PetriNetUnfolderBase]: 739/1475 cut-off events. [2023-11-17 16:27:22,470 INFO L125 PetriNetUnfolderBase]: For 37289/37289 co-relation queries the response was YES. [2023-11-17 16:27:22,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12630 conditions, 1475 events. 739/1475 cut-off events. For 37289/37289 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 8961 event pairs, 74 based on Foata normal form. 4/1479 useless extension candidates. Maximal degree in co-relation 12546. Up to 670 conditions per place. [2023-11-17 16:27:22,481 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 213 selfloop transitions, 133 changer transitions 44/390 dead transitions. [2023-11-17 16:27:22,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 390 transitions, 6754 flow [2023-11-17 16:27:22,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-17 16:27:22,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-17 16:27:22,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1762 transitions. [2023-11-17 16:27:22,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40036355373778687 [2023-11-17 16:27:22,482 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1762 transitions. [2023-11-17 16:27:22,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1762 transitions. [2023-11-17 16:27:22,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:22,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1762 transitions. [2023-11-17 16:27:22,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 65.25925925925925) internal successors, (1762), 27 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:22,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 163.0) internal successors, (4564), 28 states have internal predecessors, (4564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:22,486 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 163.0) internal successors, (4564), 28 states have internal predecessors, (4564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:22,486 INFO L175 Difference]: Start difference. First operand has 269 places, 278 transitions, 4320 flow. Second operand 27 states and 1762 transitions. [2023-11-17 16:27:22,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 390 transitions, 6754 flow [2023-11-17 16:27:22,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 390 transitions, 5682 flow, removed 467 selfloop flow, removed 25 redundant places. [2023-11-17 16:27:22,664 INFO L231 Difference]: Finished difference. Result has 276 places, 285 transitions, 4267 flow [2023-11-17 16:27:22,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=3693, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4267, PETRI_PLACES=276, PETRI_TRANSITIONS=285} [2023-11-17 16:27:22,665 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 256 predicate places. [2023-11-17 16:27:22,665 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 285 transitions, 4267 flow [2023-11-17 16:27:22,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 61.65384615384615) internal successors, (1603), 26 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:22,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:22,665 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:22,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-17 16:27:22,869 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 [2023-11-17 16:27:22,869 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:22,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:22,870 INFO L85 PathProgramCache]: Analyzing trace with hash -2030466790, now seen corresponding path program 29 times [2023-11-17 16:27:22,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:22,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717752966] [2023-11-17 16:27:22,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:22,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:22,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:23,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:23,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:23,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717752966] [2023-11-17 16:27:23,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717752966] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:23,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586379884] [2023-11-17 16:27:23,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:27:23,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:23,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:23,040 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) [2023-11-17 16:27:23,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-17 16:27:23,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:27:23,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:27:23,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 16:27:23,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:23,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:23,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:23,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:23,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586379884] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:23,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:23,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2023-11-17 16:27:23,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166815182] [2023-11-17 16:27:23,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:23,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 16:27:23,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:23,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 16:27:23,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2023-11-17 16:27:23,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:27:23,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 285 transitions, 4267 flow. Second operand has 25 states, 25 states have (on average 61.68) internal successors, (1542), 25 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:23,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:23,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:27:23,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:24,256 INFO L124 PetriNetUnfolderBase]: 714/1431 cut-off events. [2023-11-17 16:27:24,257 INFO L125 PetriNetUnfolderBase]: For 22065/22065 co-relation queries the response was YES. [2023-11-17 16:27:24,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10932 conditions, 1431 events. 714/1431 cut-off events. For 22065/22065 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 8721 event pairs, 46 based on Foata normal form. 9/1440 useless extension candidates. Maximal degree in co-relation 10847. Up to 507 conditions per place. [2023-11-17 16:27:24,266 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 193 selfloop transitions, 167 changer transitions 22/382 dead transitions. [2023-11-17 16:27:24,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 382 transitions, 5834 flow [2023-11-17 16:27:24,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-17 16:27:24,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-17 16:27:24,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2576 transitions. [2023-11-17 16:27:24,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3950920245398773 [2023-11-17 16:27:24,269 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2576 transitions. [2023-11-17 16:27:24,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2576 transitions. [2023-11-17 16:27:24,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:24,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2576 transitions. [2023-11-17 16:27:24,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 64.4) internal successors, (2576), 40 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:24,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 163.0) internal successors, (6683), 41 states have internal predecessors, (6683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:24,274 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 163.0) internal successors, (6683), 41 states have internal predecessors, (6683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:24,274 INFO L175 Difference]: Start difference. First operand has 276 places, 285 transitions, 4267 flow. Second operand 40 states and 2576 transitions. [2023-11-17 16:27:24,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 382 transitions, 5834 flow [2023-11-17 16:27:24,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 382 transitions, 5586 flow, removed 57 selfloop flow, removed 22 redundant places. [2023-11-17 16:27:24,389 INFO L231 Difference]: Finished difference. Result has 285 places, 287 transitions, 4486 flow [2023-11-17 16:27:24,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=4040, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=4486, PETRI_PLACES=285, PETRI_TRANSITIONS=287} [2023-11-17 16:27:24,389 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 265 predicate places. [2023-11-17 16:27:24,389 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 287 transitions, 4486 flow [2023-11-17 16:27:24,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 61.68) internal successors, (1542), 25 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:24,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:24,390 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:24,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-17 16:27:24,594 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 [2023-11-17 16:27:24,594 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:24,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:24,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1754249762, now seen corresponding path program 30 times [2023-11-17 16:27:24,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:24,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220834465] [2023-11-17 16:27:24,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:24,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:24,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:24,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:24,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:24,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220834465] [2023-11-17 16:27:24,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220834465] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:24,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727865977] [2023-11-17 16:27:24,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:27:24,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:24,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:24,712 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) [2023-11-17 16:27:24,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-17 16:27:24,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 16:27:24,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:27:24,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 16:27:24,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:24,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:24,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:25,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:25,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727865977] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:25,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:25,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2023-11-17 16:27:25,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939593025] [2023-11-17 16:27:25,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:25,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 16:27:25,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:25,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 16:27:25,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2023-11-17 16:27:25,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:27:25,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 287 transitions, 4486 flow. Second operand has 25 states, 25 states have (on average 61.72) internal successors, (1543), 25 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:25,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:25,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:27:25,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:25,824 INFO L124 PetriNetUnfolderBase]: 697/1363 cut-off events. [2023-11-17 16:27:25,825 INFO L125 PetriNetUnfolderBase]: For 21521/21521 co-relation queries the response was YES. [2023-11-17 16:27:25,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10779 conditions, 1363 events. 697/1363 cut-off events. For 21521/21521 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 7972 event pairs, 46 based on Foata normal form. 16/1379 useless extension candidates. Maximal degree in co-relation 10697. Up to 499 conditions per place. [2023-11-17 16:27:25,833 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 159 selfloop transitions, 123 changer transitions 85/367 dead transitions. [2023-11-17 16:27:25,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 367 transitions, 5816 flow [2023-11-17 16:27:25,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-17 16:27:25,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-17 16:27:25,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2379 transitions. [2023-11-17 16:27:25,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3944619466091859 [2023-11-17 16:27:25,835 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2379 transitions. [2023-11-17 16:27:25,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2379 transitions. [2023-11-17 16:27:25,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:25,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2379 transitions. [2023-11-17 16:27:25,838 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) [2023-11-17 16:27:25,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 163.0) internal successors, (6194), 38 states have internal predecessors, (6194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:25,840 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 163.0) internal successors, (6194), 38 states have internal predecessors, (6194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:25,841 INFO L175 Difference]: Start difference. First operand has 285 places, 287 transitions, 4486 flow. Second operand 37 states and 2379 transitions. [2023-11-17 16:27:25,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 367 transitions, 5816 flow [2023-11-17 16:27:25,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 367 transitions, 5502 flow, removed 58 selfloop flow, removed 26 redundant places. [2023-11-17 16:27:25,937 INFO L231 Difference]: Finished difference. Result has 287 places, 238 transitions, 3685 flow [2023-11-17 16:27:25,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=4178, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=3685, PETRI_PLACES=287, PETRI_TRANSITIONS=238} [2023-11-17 16:27:25,938 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 267 predicate places. [2023-11-17 16:27:25,938 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 238 transitions, 3685 flow [2023-11-17 16:27:25,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 61.72) internal successors, (1543), 25 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:25,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:25,938 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:25,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-17 16:27:26,142 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 [2023-11-17 16:27:26,143 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:26,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:26,143 INFO L85 PathProgramCache]: Analyzing trace with hash 951705368, now seen corresponding path program 31 times [2023-11-17 16:27:26,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:26,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822638256] [2023-11-17 16:27:26,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:26,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:26,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:26,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:26,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822638256] [2023-11-17 16:27:26,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822638256] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:26,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810882742] [2023-11-17 16:27:26,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:27:26,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:26,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:26,286 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) [2023-11-17 16:27:26,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-17 16:27:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:26,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 16:27:26,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:26,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:26,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:26,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:26,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810882742] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:26,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:26,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-17 16:27:26,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918458567] [2023-11-17 16:27:26,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:26,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 16:27:26,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:26,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 16:27:26,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2023-11-17 16:27:26,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:27:26,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 238 transitions, 3685 flow. Second operand has 25 states, 25 states have (on average 61.64) internal successors, (1541), 25 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:26,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:26,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:27:26,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:27,454 INFO L124 PetriNetUnfolderBase]: 618/1179 cut-off events. [2023-11-17 16:27:27,455 INFO L125 PetriNetUnfolderBase]: For 22154/22154 co-relation queries the response was YES. [2023-11-17 16:27:27,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9975 conditions, 1179 events. 618/1179 cut-off events. For 22154/22154 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6274 event pairs, 4 based on Foata normal form. 9/1188 useless extension candidates. Maximal degree in co-relation 9894. Up to 545 conditions per place. [2023-11-17 16:27:27,464 INFO L140 encePairwiseOnDemand]: 154/163 looper letters, 236 selfloop transitions, 73 changer transitions 66/375 dead transitions. [2023-11-17 16:27:27,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 375 transitions, 6164 flow [2023-11-17 16:27:27,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-17 16:27:27,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-17 16:27:27,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2278 transitions. [2023-11-17 16:27:27,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3992988606485539 [2023-11-17 16:27:27,466 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2278 transitions. [2023-11-17 16:27:27,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2278 transitions. [2023-11-17 16:27:27,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:27,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2278 transitions. [2023-11-17 16:27:27,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 65.08571428571429) internal successors, (2278), 35 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:27,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 163.0) internal successors, (5868), 36 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:27,471 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 163.0) internal successors, (5868), 36 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:27,471 INFO L175 Difference]: Start difference. First operand has 287 places, 238 transitions, 3685 flow. Second operand 35 states and 2278 transitions. [2023-11-17 16:27:27,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 375 transitions, 6164 flow [2023-11-17 16:27:27,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 375 transitions, 5480 flow, removed 182 selfloop flow, removed 38 redundant places. [2023-11-17 16:27:27,556 INFO L231 Difference]: Finished difference. Result has 277 places, 233 transitions, 3643 flow [2023-11-17 16:27:27,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=3236, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3643, PETRI_PLACES=277, PETRI_TRANSITIONS=233} [2023-11-17 16:27:27,557 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 257 predicate places. [2023-11-17 16:27:27,557 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 233 transitions, 3643 flow [2023-11-17 16:27:27,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 61.64) internal successors, (1541), 25 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:27,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:27,557 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:27,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-17 16:27:27,761 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 [2023-11-17 16:27:27,762 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:27,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:27,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1297886824, now seen corresponding path program 32 times [2023-11-17 16:27:27,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:27,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374599850] [2023-11-17 16:27:27,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:27,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:27,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:27,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:27,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374599850] [2023-11-17 16:27:27,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374599850] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:27,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99815594] [2023-11-17 16:27:27,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:27:27,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:27,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:27,929 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) [2023-11-17 16:27:27,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-17 16:27:27,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:27:27,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:27:27,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 16:27:27,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:28,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:28,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:28,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:28,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99815594] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:28,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:28,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2023-11-17 16:27:28,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743570251] [2023-11-17 16:27:28,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:28,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 16:27:28,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:28,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 16:27:28,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-11-17 16:27:28,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:27:28,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 233 transitions, 3643 flow. Second operand has 24 states, 24 states have (on average 61.666666666666664) internal successors, (1480), 24 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:28,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:28,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:27:28,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:28,930 INFO L124 PetriNetUnfolderBase]: 525/1035 cut-off events. [2023-11-17 16:27:28,930 INFO L125 PetriNetUnfolderBase]: For 19991/19991 co-relation queries the response was YES. [2023-11-17 16:27:28,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8936 conditions, 1035 events. 525/1035 cut-off events. For 19991/19991 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5363 event pairs, 4 based on Foata normal form. 7/1042 useless extension candidates. Maximal degree in co-relation 8848. Up to 531 conditions per place. [2023-11-17 16:27:28,937 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 216 selfloop transitions, 85 changer transitions 19/320 dead transitions. [2023-11-17 16:27:28,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 320 transitions, 5480 flow [2023-11-17 16:27:28,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-17 16:27:28,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-17 16:27:28,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1611 transitions. [2023-11-17 16:27:28,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39533742331288346 [2023-11-17 16:27:28,939 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1611 transitions. [2023-11-17 16:27:28,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1611 transitions. [2023-11-17 16:27:28,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:28,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1611 transitions. [2023-11-17 16:27:28,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 64.44) internal successors, (1611), 25 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:28,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 163.0) internal successors, (4238), 26 states have internal predecessors, (4238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:28,942 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 163.0) internal successors, (4238), 26 states have internal predecessors, (4238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:28,942 INFO L175 Difference]: Start difference. First operand has 277 places, 233 transitions, 3643 flow. Second operand 25 states and 1611 transitions. [2023-11-17 16:27:28,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 320 transitions, 5480 flow [2023-11-17 16:27:29,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 320 transitions, 4690 flow, removed 322 selfloop flow, removed 29 redundant places. [2023-11-17 16:27:29,024 INFO L231 Difference]: Finished difference. Result has 257 places, 252 transitions, 3907 flow [2023-11-17 16:27:29,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=3202, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3907, PETRI_PLACES=257, PETRI_TRANSITIONS=252} [2023-11-17 16:27:29,024 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 237 predicate places. [2023-11-17 16:27:29,024 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 252 transitions, 3907 flow [2023-11-17 16:27:29,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 61.666666666666664) internal successors, (1480), 24 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:29,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:29,025 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:29,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-17 16:27:29,230 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 [2023-11-17 16:27:29,230 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:29,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:29,231 INFO L85 PathProgramCache]: Analyzing trace with hash 980924682, now seen corresponding path program 33 times [2023-11-17 16:27:29,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:29,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117511753] [2023-11-17 16:27:29,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:29,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:29,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:29,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:29,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:29,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117511753] [2023-11-17 16:27:29,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117511753] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:29,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172432021] [2023-11-17 16:27:29,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:27:29,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:29,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:29,358 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) [2023-11-17 16:27:29,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-17 16:27:29,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:27:29,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:27:29,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 16:27:29,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:29,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:29,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:29,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:29,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172432021] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:29,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:29,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-17 16:27:29,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331416093] [2023-11-17 16:27:29,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:29,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 16:27:29,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:29,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 16:27:29,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2023-11-17 16:27:29,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:27:29,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 252 transitions, 3907 flow. Second operand has 25 states, 25 states have (on average 61.68) internal successors, (1542), 25 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:29,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:29,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:27:29,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:30,268 INFO L124 PetriNetUnfolderBase]: 523/1006 cut-off events. [2023-11-17 16:27:30,268 INFO L125 PetriNetUnfolderBase]: For 12729/12729 co-relation queries the response was YES. [2023-11-17 16:27:30,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8031 conditions, 1006 events. 523/1006 cut-off events. For 12729/12729 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5049 event pairs, 16 based on Foata normal form. 6/1010 useless extension candidates. Maximal degree in co-relation 7955. Up to 587 conditions per place. [2023-11-17 16:27:30,275 INFO L140 encePairwiseOnDemand]: 154/163 looper letters, 237 selfloop transitions, 80 changer transitions 25/342 dead transitions. [2023-11-17 16:27:30,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 342 transitions, 5490 flow [2023-11-17 16:27:30,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-17 16:27:30,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-17 16:27:30,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2069 transitions. [2023-11-17 16:27:30,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3966641104294479 [2023-11-17 16:27:30,277 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2069 transitions. [2023-11-17 16:27:30,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2069 transitions. [2023-11-17 16:27:30,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:30,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2069 transitions. [2023-11-17 16:27:30,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 64.65625) internal successors, (2069), 32 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:30,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 163.0) internal successors, (5379), 33 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:30,281 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 163.0) internal successors, (5379), 33 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:30,281 INFO L175 Difference]: Start difference. First operand has 257 places, 252 transitions, 3907 flow. Second operand 32 states and 2069 transitions. [2023-11-17 16:27:30,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 342 transitions, 5490 flow [2023-11-17 16:27:30,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 342 transitions, 4824 flow, removed 300 selfloop flow, removed 15 redundant places. [2023-11-17 16:27:30,368 INFO L231 Difference]: Finished difference. Result has 275 places, 247 transitions, 3692 flow [2023-11-17 16:27:30,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=3482, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=3692, PETRI_PLACES=275, PETRI_TRANSITIONS=247} [2023-11-17 16:27:30,368 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 255 predicate places. [2023-11-17 16:27:30,368 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 247 transitions, 3692 flow [2023-11-17 16:27:30,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 61.68) internal successors, (1542), 25 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:30,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:30,369 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:30,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-17 16:27:30,573 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 [2023-11-17 16:27:30,573 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:30,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:30,574 INFO L85 PathProgramCache]: Analyzing trace with hash -290094588, now seen corresponding path program 34 times [2023-11-17 16:27:30,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:30,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998102339] [2023-11-17 16:27:30,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:30,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:30,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:30,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:30,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:30,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998102339] [2023-11-17 16:27:30,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998102339] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:30,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391816768] [2023-11-17 16:27:30,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:27:30,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:30,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:30,714 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) [2023-11-17 16:27:30,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-17 16:27:30,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:27:30,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:27:30,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 16:27:30,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:30,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:30,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:31,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391816768] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:31,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:31,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-11-17 16:27:31,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96659635] [2023-11-17 16:27:31,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:31,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-17 16:27:31,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:31,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-17 16:27:31,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2023-11-17 16:27:31,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:27:31,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 247 transitions, 3692 flow. Second operand has 29 states, 29 states have (on average 61.51724137931034) internal successors, (1784), 29 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:31,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:31,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:27:31,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:31,988 INFO L124 PetriNetUnfolderBase]: 827/1590 cut-off events. [2023-11-17 16:27:31,989 INFO L125 PetriNetUnfolderBase]: For 17211/17211 co-relation queries the response was YES. [2023-11-17 16:27:31,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12457 conditions, 1590 events. 827/1590 cut-off events. For 17211/17211 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 9014 event pairs, 21 based on Foata normal form. 4/1592 useless extension candidates. Maximal degree in co-relation 12378. Up to 579 conditions per place. [2023-11-17 16:27:31,999 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 188 selfloop transitions, 296 changer transitions 12/496 dead transitions. [2023-11-17 16:27:32,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 496 transitions, 7777 flow [2023-11-17 16:27:32,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-17 16:27:32,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-11-17 16:27:32,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3401 transitions. [2023-11-17 16:27:32,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39367982405370994 [2023-11-17 16:27:32,003 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3401 transitions. [2023-11-17 16:27:32,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3401 transitions. [2023-11-17 16:27:32,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:32,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3401 transitions. [2023-11-17 16:27:32,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 64.16981132075472) internal successors, (3401), 53 states have internal predecessors, (3401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:32,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 163.0) internal successors, (8802), 54 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:32,010 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 163.0) internal successors, (8802), 54 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:32,010 INFO L175 Difference]: Start difference. First operand has 275 places, 247 transitions, 3692 flow. Second operand 53 states and 3401 transitions. [2023-11-17 16:27:32,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 496 transitions, 7777 flow [2023-11-17 16:27:32,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 496 transitions, 7295 flow, removed 102 selfloop flow, removed 30 redundant places. [2023-11-17 16:27:32,093 INFO L231 Difference]: Finished difference. Result has 297 places, 387 transitions, 6573 flow [2023-11-17 16:27:32,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=3375, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=6573, PETRI_PLACES=297, PETRI_TRANSITIONS=387} [2023-11-17 16:27:32,093 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 277 predicate places. [2023-11-17 16:27:32,093 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 387 transitions, 6573 flow [2023-11-17 16:27:32,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 61.51724137931034) internal successors, (1784), 29 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:32,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:32,094 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:32,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-17 16:27:32,298 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 [2023-11-17 16:27:32,298 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:32,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:32,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1427704628, now seen corresponding path program 35 times [2023-11-17 16:27:32,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:32,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13462992] [2023-11-17 16:27:32,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:32,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:32,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:32,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:32,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:32,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13462992] [2023-11-17 16:27:32,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13462992] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:32,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143853188] [2023-11-17 16:27:32,446 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:27:32,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:32,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:32,458 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) [2023-11-17 16:27:32,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-17 16:27:32,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 16:27:32,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:27:32,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 16:27:32,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:32,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:32,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:32,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143853188] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:32,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:32,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-11-17 16:27:32,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594703765] [2023-11-17 16:27:32,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:32,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-17 16:27:32,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:32,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-17 16:27:32,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2023-11-17 16:27:32,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:27:32,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 387 transitions, 6573 flow. Second operand has 29 states, 29 states have (on average 61.58620689655172) internal successors, (1786), 29 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:32,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:32,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:27:32,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:34,168 INFO L124 PetriNetUnfolderBase]: 888/1671 cut-off events. [2023-11-17 16:27:34,168 INFO L125 PetriNetUnfolderBase]: For 19294/19294 co-relation queries the response was YES. [2023-11-17 16:27:34,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14116 conditions, 1671 events. 888/1671 cut-off events. For 19294/19294 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 9427 event pairs, 21 based on Foata normal form. 10/1679 useless extension candidates. Maximal degree in co-relation 14033. Up to 635 conditions per place. [2023-11-17 16:27:34,183 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 195 selfloop transitions, 317 changer transitions 20/532 dead transitions. [2023-11-17 16:27:34,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 532 transitions, 9161 flow [2023-11-17 16:27:34,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-17 16:27:34,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-11-17 16:27:34,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 4087 transitions. [2023-11-17 16:27:34,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3917753067484663 [2023-11-17 16:27:34,186 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 4087 transitions. [2023-11-17 16:27:34,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 4087 transitions. [2023-11-17 16:27:34,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:34,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 4087 transitions. [2023-11-17 16:27:34,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 63.859375) internal successors, (4087), 64 states have internal predecessors, (4087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:34,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 163.0) internal successors, (10595), 65 states have internal predecessors, (10595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:34,196 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 163.0) internal successors, (10595), 65 states have internal predecessors, (10595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:34,196 INFO L175 Difference]: Start difference. First operand has 297 places, 387 transitions, 6573 flow. Second operand 64 states and 4087 transitions. [2023-11-17 16:27:34,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 532 transitions, 9161 flow [2023-11-17 16:27:34,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 532 transitions, 7589 flow, removed 667 selfloop flow, removed 23 redundant places. [2023-11-17 16:27:34,340 INFO L231 Difference]: Finished difference. Result has 340 places, 418 transitions, 6471 flow [2023-11-17 16:27:34,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=5399, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=6471, PETRI_PLACES=340, PETRI_TRANSITIONS=418} [2023-11-17 16:27:34,341 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 320 predicate places. [2023-11-17 16:27:34,341 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 418 transitions, 6471 flow [2023-11-17 16:27:34,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 61.58620689655172) internal successors, (1786), 29 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:34,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:34,342 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:34,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-17 16:27:34,546 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 [2023-11-17 16:27:34,547 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:34,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:34,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1349683386, now seen corresponding path program 36 times [2023-11-17 16:27:34,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:34,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040600933] [2023-11-17 16:27:34,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:34,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:34,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:34,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:34,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:34,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040600933] [2023-11-17 16:27:34,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040600933] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:34,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795257692] [2023-11-17 16:27:34,717 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:27:34,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:34,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:34,718 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) [2023-11-17 16:27:34,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-17 16:27:34,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 16:27:34,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:27:34,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 16:27:34,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:34,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:34,914 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:35,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:35,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795257692] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:35,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:35,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-11-17 16:27:35,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194912776] [2023-11-17 16:27:35,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:35,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 16:27:35,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:35,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 16:27:35,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2023-11-17 16:27:35,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:27:35,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 418 transitions, 6471 flow. Second operand has 28 states, 28 states have (on average 61.57142857142857) internal successors, (1724), 28 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:35,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:35,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:27:35,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:35,845 INFO L124 PetriNetUnfolderBase]: 857/1594 cut-off events. [2023-11-17 16:27:35,845 INFO L125 PetriNetUnfolderBase]: For 16569/16569 co-relation queries the response was YES. [2023-11-17 16:27:35,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12205 conditions, 1594 events. 857/1594 cut-off events. For 16569/16569 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 8805 event pairs, 21 based on Foata normal form. 14/1606 useless extension candidates. Maximal degree in co-relation 12122. Up to 497 conditions per place. [2023-11-17 16:27:35,859 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 141 selfloop transitions, 215 changer transitions 162/518 dead transitions. [2023-11-17 16:27:35,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 518 transitions, 8366 flow [2023-11-17 16:27:35,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-17 16:27:35,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-17 16:27:35,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2937 transitions. [2023-11-17 16:27:35,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39170445452120567 [2023-11-17 16:27:35,867 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2937 transitions. [2023-11-17 16:27:35,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2937 transitions. [2023-11-17 16:27:35,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:35,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2937 transitions. [2023-11-17 16:27:35,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 63.84782608695652) internal successors, (2937), 46 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:35,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 163.0) internal successors, (7661), 47 states have internal predecessors, (7661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:35,874 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 163.0) internal successors, (7661), 47 states have internal predecessors, (7661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:35,874 INFO L175 Difference]: Start difference. First operand has 340 places, 418 transitions, 6471 flow. Second operand 46 states and 2937 transitions. [2023-11-17 16:27:35,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 518 transitions, 8366 flow [2023-11-17 16:27:35,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 518 transitions, 7826 flow, removed 53 selfloop flow, removed 35 redundant places. [2023-11-17 16:27:35,984 INFO L231 Difference]: Finished difference. Result has 344 places, 308 transitions, 5065 flow [2023-11-17 16:27:35,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=5942, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=5065, PETRI_PLACES=344, PETRI_TRANSITIONS=308} [2023-11-17 16:27:35,984 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 324 predicate places. [2023-11-17 16:27:35,985 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 308 transitions, 5065 flow [2023-11-17 16:27:35,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 61.57142857142857) internal successors, (1724), 28 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:35,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:35,985 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:35,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-11-17 16:27:36,189 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 [2023-11-17 16:27:36,189 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:36,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:36,190 INFO L85 PathProgramCache]: Analyzing trace with hash 201567046, now seen corresponding path program 37 times [2023-11-17 16:27:36,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:36,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009143873] [2023-11-17 16:27:36,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:36,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:36,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:36,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:36,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009143873] [2023-11-17 16:27:36,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009143873] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:36,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800630512] [2023-11-17 16:27:36,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:27:36,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:36,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:36,317 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) [2023-11-17 16:27:36,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-17 16:27:36,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:36,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 16:27:36,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:36,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:36,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:36,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:36,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800630512] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:36,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:36,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2023-11-17 16:27:36,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313481803] [2023-11-17 16:27:36,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:36,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 16:27:36,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:36,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 16:27:36,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2023-11-17 16:27:36,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:27:36,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 308 transitions, 5065 flow. Second operand has 26 states, 26 states have (on average 61.65384615384615) internal successors, (1603), 26 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:36,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:36,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:27:36,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:37,433 INFO L124 PetriNetUnfolderBase]: 983/1680 cut-off events. [2023-11-17 16:27:37,434 INFO L125 PetriNetUnfolderBase]: For 23102/23102 co-relation queries the response was YES. [2023-11-17 16:27:37,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14836 conditions, 1680 events. 983/1680 cut-off events. For 23102/23102 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 8360 event pairs, 19 based on Foata normal form. 2/1680 useless extension candidates. Maximal degree in co-relation 14752. Up to 910 conditions per place. [2023-11-17 16:27:37,446 INFO L140 encePairwiseOnDemand]: 154/163 looper letters, 287 selfloop transitions, 207 changer transitions 78/572 dead transitions. [2023-11-17 16:27:37,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 572 transitions, 10171 flow [2023-11-17 16:27:37,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-17 16:27:37,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-17 16:27:37,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2996 transitions. [2023-11-17 16:27:37,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3910716616629683 [2023-11-17 16:27:37,448 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2996 transitions. [2023-11-17 16:27:37,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2996 transitions. [2023-11-17 16:27:37,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:37,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2996 transitions. [2023-11-17 16:27:37,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 63.744680851063826) internal successors, (2996), 47 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:37,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 163.0) internal successors, (7824), 48 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:37,454 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 163.0) internal successors, (7824), 48 states have internal predecessors, (7824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:37,454 INFO L175 Difference]: Start difference. First operand has 344 places, 308 transitions, 5065 flow. Second operand 47 states and 2996 transitions. [2023-11-17 16:27:37,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 572 transitions, 10171 flow [2023-11-17 16:27:37,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 572 transitions, 9081 flow, removed 125 selfloop flow, removed 46 redundant places. [2023-11-17 16:27:37,567 INFO L231 Difference]: Finished difference. Result has 321 places, 426 transitions, 7306 flow [2023-11-17 16:27:37,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=4378, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=7306, PETRI_PLACES=321, PETRI_TRANSITIONS=426} [2023-11-17 16:27:37,568 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 301 predicate places. [2023-11-17 16:27:37,568 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 426 transitions, 7306 flow [2023-11-17 16:27:37,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 61.65384615384615) internal successors, (1603), 26 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:37,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:37,569 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:37,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-11-17 16:27:37,773 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 [2023-11-17 16:27:37,773 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:37,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:37,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1206110204, now seen corresponding path program 38 times [2023-11-17 16:27:37,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:37,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396336738] [2023-11-17 16:27:37,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:37,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:37,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:37,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:37,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396336738] [2023-11-17 16:27:37,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396336738] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:37,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101331983] [2023-11-17 16:27:37,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:27:37,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:37,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:37,944 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) [2023-11-17 16:27:37,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-17 16:27:38,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:27:38,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:27:38,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 16:27:38,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:38,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:38,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:38,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101331983] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:38,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:38,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2023-11-17 16:27:38,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875516880] [2023-11-17 16:27:38,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:38,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 16:27:38,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:38,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 16:27:38,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2023-11-17 16:27:38,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:27:38,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 426 transitions, 7306 flow. Second operand has 26 states, 26 states have (on average 61.65384615384615) internal successors, (1603), 26 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:38,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:38,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:27:38,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:39,022 INFO L124 PetriNetUnfolderBase]: 1012/1732 cut-off events. [2023-11-17 16:27:39,022 INFO L125 PetriNetUnfolderBase]: For 25601/25601 co-relation queries the response was YES. [2023-11-17 16:27:39,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15566 conditions, 1732 events. 1012/1732 cut-off events. For 25601/25601 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8597 event pairs, 20 based on Foata normal form. 5/1737 useless extension candidates. Maximal degree in co-relation 15467. Up to 1004 conditions per place. [2023-11-17 16:27:39,038 INFO L140 encePairwiseOnDemand]: 154/163 looper letters, 315 selfloop transitions, 194 changer transitions 81/590 dead transitions. [2023-11-17 16:27:39,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 590 transitions, 10775 flow [2023-11-17 16:27:39,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-17 16:27:39,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-17 16:27:39,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2617 transitions. [2023-11-17 16:27:39,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39159060302259463 [2023-11-17 16:27:39,040 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2617 transitions. [2023-11-17 16:27:39,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2617 transitions. [2023-11-17 16:27:39,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:39,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2617 transitions. [2023-11-17 16:27:39,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 63.829268292682926) internal successors, (2617), 41 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:39,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 163.0) internal successors, (6846), 42 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:39,045 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 163.0) internal successors, (6846), 42 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:39,045 INFO L175 Difference]: Start difference. First operand has 321 places, 426 transitions, 7306 flow. Second operand 41 states and 2617 transitions. [2023-11-17 16:27:39,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 590 transitions, 10775 flow [2023-11-17 16:27:39,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 590 transitions, 10227 flow, removed 195 selfloop flow, removed 38 redundant places. [2023-11-17 16:27:39,211 INFO L231 Difference]: Finished difference. Result has 329 places, 455 transitions, 8226 flow [2023-11-17 16:27:39,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=6827, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=8226, PETRI_PLACES=329, PETRI_TRANSITIONS=455} [2023-11-17 16:27:39,212 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 309 predicate places. [2023-11-17 16:27:39,212 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 455 transitions, 8226 flow [2023-11-17 16:27:39,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 61.65384615384615) internal successors, (1603), 26 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:39,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:39,212 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:39,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-11-17 16:27:39,416 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 [2023-11-17 16:27:39,416 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:39,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:39,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1245508230, now seen corresponding path program 39 times [2023-11-17 16:27:39,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:39,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82059225] [2023-11-17 16:27:39,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:39,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:39,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:39,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:39,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82059225] [2023-11-17 16:27:39,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82059225] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:39,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862381194] [2023-11-17 16:27:39,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:27:39,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:39,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:39,550 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:27:39,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-17 16:27:39,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:27:39,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:27:39,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 16:27:39,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:39,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:39,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:40,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:40,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862381194] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:40,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:40,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-11-17 16:27:40,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780910207] [2023-11-17 16:27:40,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:40,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 16:27:40,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:40,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 16:27:40,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2023-11-17 16:27:40,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:27:40,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 455 transitions, 8226 flow. Second operand has 28 states, 28 states have (on average 61.535714285714285) internal successors, (1723), 28 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:40,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:40,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:27:40,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:41,314 INFO L124 PetriNetUnfolderBase]: 951/1621 cut-off events. [2023-11-17 16:27:41,314 INFO L125 PetriNetUnfolderBase]: For 28834/28834 co-relation queries the response was YES. [2023-11-17 16:27:41,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15315 conditions, 1621 events. 951/1621 cut-off events. For 28834/28834 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7747 event pairs, 10 based on Foata normal form. 7/1628 useless extension candidates. Maximal degree in co-relation 15211. Up to 934 conditions per place. [2023-11-17 16:27:41,330 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 359 selfloop transitions, 153 changer transitions 39/551 dead transitions. [2023-11-17 16:27:41,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 551 transitions, 10192 flow [2023-11-17 16:27:41,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-17 16:27:41,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-17 16:27:41,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2559 transitions. [2023-11-17 16:27:41,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924846625766871 [2023-11-17 16:27:41,332 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2559 transitions. [2023-11-17 16:27:41,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2559 transitions. [2023-11-17 16:27:41,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:41,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2559 transitions. [2023-11-17 16:27:41,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 63.975) internal successors, (2559), 40 states have internal predecessors, (2559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:41,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 163.0) internal successors, (6683), 41 states have internal predecessors, (6683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:41,337 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 163.0) internal successors, (6683), 41 states have internal predecessors, (6683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:41,337 INFO L175 Difference]: Start difference. First operand has 329 places, 455 transitions, 8226 flow. Second operand 40 states and 2559 transitions. [2023-11-17 16:27:41,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 551 transitions, 10192 flow [2023-11-17 16:27:41,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 551 transitions, 9569 flow, removed 232 selfloop flow, removed 30 redundant places. [2023-11-17 16:27:41,553 INFO L231 Difference]: Finished difference. Result has 327 places, 457 transitions, 8069 flow [2023-11-17 16:27:41,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=7652, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=8069, PETRI_PLACES=327, PETRI_TRANSITIONS=457} [2023-11-17 16:27:41,555 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 307 predicate places. [2023-11-17 16:27:41,555 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 457 transitions, 8069 flow [2023-11-17 16:27:41,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 61.535714285714285) internal successors, (1723), 28 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:41,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:41,555 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:41,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-11-17 16:27:41,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:41,759 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:41,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:41,760 INFO L85 PathProgramCache]: Analyzing trace with hash -265100360, now seen corresponding path program 40 times [2023-11-17 16:27:41,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:41,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571909295] [2023-11-17 16:27:41,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:41,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:41,911 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:41,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:41,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571909295] [2023-11-17 16:27:41,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571909295] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:41,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679952489] [2023-11-17 16:27:41,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:27:41,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:41,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:41,912 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:27:41,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-17 16:27:41,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:27:41,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:27:41,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-17 16:27:41,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:42,141 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:42,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:42,329 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:42,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679952489] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:42,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:42,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-11-17 16:27:42,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329493262] [2023-11-17 16:27:42,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:42,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-17 16:27:42,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:42,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-17 16:27:42,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2023-11-17 16:27:42,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:27:42,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 457 transitions, 8069 flow. Second operand has 30 states, 30 states have (on average 61.56666666666667) internal successors, (1847), 30 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:42,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:42,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:27:42,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:43,064 INFO L124 PetriNetUnfolderBase]: 1038/1737 cut-off events. [2023-11-17 16:27:43,064 INFO L125 PetriNetUnfolderBase]: For 33123/33123 co-relation queries the response was YES. [2023-11-17 16:27:43,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16746 conditions, 1737 events. 1038/1737 cut-off events. For 33123/33123 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8423 event pairs, 15 based on Foata normal form. 2/1739 useless extension candidates. Maximal degree in co-relation 16650. Up to 711 conditions per place. [2023-11-17 16:27:43,077 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 172 selfloop transitions, 29 changer transitions 389/590 dead transitions. [2023-11-17 16:27:43,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 590 transitions, 11187 flow [2023-11-17 16:27:43,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-17 16:27:43,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-17 16:27:43,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2230 transitions. [2023-11-17 16:27:43,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3908851884312007 [2023-11-17 16:27:43,083 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2230 transitions. [2023-11-17 16:27:43,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2230 transitions. [2023-11-17 16:27:43,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:43,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2230 transitions. [2023-11-17 16:27:43,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 63.714285714285715) internal successors, (2230), 35 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:43,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 163.0) internal successors, (5868), 36 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:43,087 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 163.0) internal successors, (5868), 36 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:43,087 INFO L175 Difference]: Start difference. First operand has 327 places, 457 transitions, 8069 flow. Second operand 35 states and 2230 transitions. [2023-11-17 16:27:43,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 590 transitions, 11187 flow [2023-11-17 16:27:43,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 590 transitions, 10768 flow, removed 91 selfloop flow, removed 31 redundant places. [2023-11-17 16:27:43,273 INFO L231 Difference]: Finished difference. Result has 325 places, 190 transitions, 3366 flow [2023-11-17 16:27:43,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=7662, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3366, PETRI_PLACES=325, PETRI_TRANSITIONS=190} [2023-11-17 16:27:43,277 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 305 predicate places. [2023-11-17 16:27:43,277 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 190 transitions, 3366 flow [2023-11-17 16:27:43,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 61.56666666666667) internal successors, (1847), 30 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:43,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:43,277 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:43,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-11-17 16:27:43,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-11-17 16:27:43,481 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:43,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:43,482 INFO L85 PathProgramCache]: Analyzing trace with hash -933448840, now seen corresponding path program 41 times [2023-11-17 16:27:43,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:43,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501103881] [2023-11-17 16:27:43,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:43,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:43,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:27:43,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:43,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501103881] [2023-11-17 16:27:43,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501103881] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:43,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945558724] [2023-11-17 16:27:43,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:27:43,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:43,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:43,634 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:27:43,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-17 16:27:43,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:27:43,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:27:43,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 16:27:43,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:43,844 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:43,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:44,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:44,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945558724] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:44,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:44,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 28 [2023-11-17 16:27:44,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35170297] [2023-11-17 16:27:44,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:44,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-17 16:27:44,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:44,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-17 16:27:44,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2023-11-17 16:27:44,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:27:44,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 190 transitions, 3366 flow. Second operand has 30 states, 30 states have (on average 61.63333333333333) internal successors, (1849), 30 states have internal predecessors, (1849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:44,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:44,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:27:44,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:44,861 INFO L124 PetriNetUnfolderBase]: 494/846 cut-off events. [2023-11-17 16:27:44,861 INFO L125 PetriNetUnfolderBase]: For 16139/16139 co-relation queries the response was YES. [2023-11-17 16:27:44,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7756 conditions, 846 events. 494/846 cut-off events. For 16139/16139 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3537 event pairs, 0 based on Foata normal form. 5/851 useless extension candidates. Maximal degree in co-relation 7665. Up to 331 conditions per place. [2023-11-17 16:27:44,867 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 74 selfloop transitions, 152 changer transitions 80/306 dead transitions. [2023-11-17 16:27:44,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 306 transitions, 5089 flow [2023-11-17 16:27:44,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-17 16:27:44,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-17 16:27:44,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2550 transitions. [2023-11-17 16:27:44,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3911042944785276 [2023-11-17 16:27:44,869 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2550 transitions. [2023-11-17 16:27:44,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2550 transitions. [2023-11-17 16:27:44,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:44,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2550 transitions. [2023-11-17 16:27:44,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 63.75) internal successors, (2550), 40 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) [2023-11-17 16:27:44,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 163.0) internal successors, (6683), 41 states have internal predecessors, (6683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:44,874 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 163.0) internal successors, (6683), 41 states have internal predecessors, (6683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:44,874 INFO L175 Difference]: Start difference. First operand has 325 places, 190 transitions, 3366 flow. Second operand 40 states and 2550 transitions. [2023-11-17 16:27:44,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 306 transitions, 5089 flow [2023-11-17 16:27:44,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 306 transitions, 4015 flow, removed 259 selfloop flow, removed 69 redundant places. [2023-11-17 16:27:44,928 INFO L231 Difference]: Finished difference. Result has 193 places, 188 transitions, 2983 flow [2023-11-17 16:27:44,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=2529, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=2983, PETRI_PLACES=193, PETRI_TRANSITIONS=188} [2023-11-17 16:27:44,929 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 173 predicate places. [2023-11-17 16:27:44,929 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 188 transitions, 2983 flow [2023-11-17 16:27:44,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 61.63333333333333) internal successors, (1849), 30 states have internal predecessors, (1849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:44,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:44,929 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:27:44,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-11-17 16:27:45,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:45,133 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:27:45,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:45,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1230529692, now seen corresponding path program 42 times [2023-11-17 16:27:45,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:45,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300554470] [2023-11-17 16:27:45,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:45,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:45,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:45,295 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:27:45,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:45,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300554470] [2023-11-17 16:27:45,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300554470] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:45,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891388599] [2023-11-17 16:27:45,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:27:45,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:45,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:45,296 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:27:45,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-17 16:27:45,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 16:27:45,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:27:45,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 16:27:45,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:45,548 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:45,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:45,781 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:45,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891388599] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:45,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:45,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 30 [2023-11-17 16:27:45,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975085564] [2023-11-17 16:27:45,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:45,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 16:27:45,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:45,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 16:27:45,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2023-11-17 16:27:45,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 163 [2023-11-17 16:27:45,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 188 transitions, 2983 flow. Second operand has 32 states, 32 states have (on average 61.59375) internal successors, (1971), 32 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:45,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:45,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 163 [2023-11-17 16:27:45,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:46,360 INFO L124 PetriNetUnfolderBase]: 366/632 cut-off events. [2023-11-17 16:27:46,360 INFO L125 PetriNetUnfolderBase]: For 5916/5916 co-relation queries the response was YES. [2023-11-17 16:27:46,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5228 conditions, 632 events. 366/632 cut-off events. For 5916/5916 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2374 event pairs, 0 based on Foata normal form. 3/635 useless extension candidates. Maximal degree in co-relation 5162. Up to 271 conditions per place. [2023-11-17 16:27:46,363 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 0 selfloop transitions, 0 changer transitions 244/244 dead transitions. [2023-11-17 16:27:46,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 244 transitions, 3920 flow [2023-11-17 16:27:46,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-17 16:27:46,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-17 16:27:46,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1896 transitions. [2023-11-17 16:27:46,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38773006134969323 [2023-11-17 16:27:46,365 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1896 transitions. [2023-11-17 16:27:46,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1896 transitions. [2023-11-17 16:27:46,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:46,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1896 transitions. [2023-11-17 16:27:46,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 63.2) internal successors, (1896), 30 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:46,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 163.0) internal successors, (5053), 31 states have internal predecessors, (5053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:46,368 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 163.0) internal successors, (5053), 31 states have internal predecessors, (5053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:46,368 INFO L175 Difference]: Start difference. First operand has 193 places, 188 transitions, 2983 flow. Second operand 30 states and 1896 transitions. [2023-11-17 16:27:46,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 244 transitions, 3920 flow [2023-11-17 16:27:46,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 244 transitions, 3604 flow, removed 66 selfloop flow, removed 25 redundant places. [2023-11-17 16:27:46,393 INFO L231 Difference]: Finished difference. Result has 182 places, 0 transitions, 0 flow [2023-11-17 16:27:46,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=2688, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=0, PETRI_PLACES=182, PETRI_TRANSITIONS=0} [2023-11-17 16:27:46,393 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 162 predicate places. [2023-11-17 16:27:46,393 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 0 transitions, 0 flow [2023-11-17 16:27:46,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 61.59375) internal successors, (1971), 32 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:46,395 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-17 16:27:46,396 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-17 16:27:46,396 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-17 16:27:46,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-11-17 16:27:46,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:46,600 INFO L445 BasicCegarLoop]: Path program histogram: [42, 1, 1] [2023-11-17 16:27:46,602 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 16:27:46,602 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 16:27:46,605 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 04:27:46 BasicIcfg [2023-11-17 16:27:46,605 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 16:27:46,606 INFO L158 Benchmark]: Toolchain (without parser) took 70137.72ms. Allocated memory was 255.9MB in the beginning and 826.3MB in the end (delta: 570.4MB). Free memory was 191.3MB in the beginning and 331.4MB in the end (delta: -140.1MB). Peak memory consumption was 431.4MB. Max. memory is 8.0GB. [2023-11-17 16:27:46,606 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 255.9MB. Free memory is still 205.4MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 16:27:46,607 INFO L158 Benchmark]: CACSL2BoogieTranslator took 199.73ms. Allocated memory is still 255.9MB. Free memory was 191.0MB in the beginning and 180.0MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-11-17 16:27:46,607 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.94ms. Allocated memory is still 255.9MB. Free memory was 180.0MB in the beginning and 178.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-11-17 16:27:46,607 INFO L158 Benchmark]: Boogie Preprocessor took 27.77ms. Allocated memory is still 255.9MB. Free memory was 178.4MB in the beginning and 177.1MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-11-17 16:27:46,607 INFO L158 Benchmark]: RCFGBuilder took 366.83ms. Allocated memory was 255.9MB in the beginning and 317.7MB in the end (delta: 61.9MB). Free memory was 177.1MB in the beginning and 273.5MB in the end (delta: -96.4MB). Peak memory consumption was 13.1MB. Max. memory is 8.0GB. [2023-11-17 16:27:46,607 INFO L158 Benchmark]: TraceAbstraction took 69510.79ms. Allocated memory was 317.7MB in the beginning and 826.3MB in the end (delta: 508.6MB). Free memory was 273.0MB in the beginning and 331.4MB in the end (delta: -58.4MB). Peak memory consumption was 450.7MB. Max. memory is 8.0GB. [2023-11-17 16:27:46,608 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 255.9MB. Free memory is still 205.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 199.73ms. Allocated memory is still 255.9MB. Free memory was 191.0MB in the beginning and 180.0MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 24.94ms. Allocated memory is still 255.9MB. Free memory was 180.0MB in the beginning and 178.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 27.77ms. Allocated memory is still 255.9MB. Free memory was 178.4MB in the beginning and 177.1MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 366.83ms. Allocated memory was 255.9MB in the beginning and 317.7MB in the end (delta: 61.9MB). Free memory was 177.1MB in the beginning and 273.5MB in the end (delta: -96.4MB). Peak memory consumption was 13.1MB. Max. memory is 8.0GB. * TraceAbstraction took 69510.79ms. Allocated memory was 317.7MB in the beginning and 826.3MB in the end (delta: 508.6MB). Free memory was 273.0MB in the beginning and 331.4MB in the end (delta: -58.4MB). Peak memory consumption was 450.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.2s, 77 PlacesBefore, 20 PlacesAfterwards, 76 TransitionsBefore, 15 TransitionsAfterwards, 504 CoEnabledTransitionPairs, 7 FixpointIterations, 44 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 76 TotalNumberOfCompositions, 545 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 542, independent: 540, independent conditional: 0, independent unconditional: 540, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 358, independent: 356, independent conditional: 0, independent unconditional: 356, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 358, independent: 356, independent conditional: 0, independent unconditional: 356, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 12, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 542, independent: 184, independent conditional: 0, independent unconditional: 184, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 358, unknown conditional: 0, unknown unconditional: 358] , Statistics on independence cache: Total cache size (in pairs): 24, Positive cache size: 24, Positive conditional cache size: 0, Positive unconditional cache size: 24, 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 - PositiveResult [Line: 78]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 102 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: 69.4s, OverallIterations: 44, TraceHistogramMax: 5, PathProgramHistogramMax: 42, EmptinessCheckTime: 0.0s, AutomataDifference: 34.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4454 SdHoareTripleChecker+Valid, 13.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4454 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 11.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1804 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 33225 IncrementalHoareTripleChecker+Invalid, 35029 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1804 mSolverCounterUnsat, 0 mSDtfsCounter, 33225 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2511 GetRequests, 704 SyntacticMatches, 11 SemanticMatches, 1796 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24926 ImplicationChecksByTransitivity, 20.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8226occurred in iteration=40, InterpolantAutomatonStates: 1286, 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, 0.9s SatisfiabilityAnalysisTime, 20.7s InterpolantComputationTime, 1427 NumberOfCodeBlocks, 1427 NumberOfCodeBlocksAsserted, 137 NumberOfCheckSat, 1999 ConstructedInterpolants, 0 QuantifiedInterpolants, 22151 SizeOfPredicates, 172 NumberOfNonLiveVariables, 5321 ConjunctsInSsa, 797 ConjunctsInUnsatCore, 128 InterpolantComputations, 2 PerfectInterpolantSequences, 25/733 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-17 16:27:46,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...