/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-counter-determinism.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 16:11:59,612 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 16:11:59,666 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 16:11:59,680 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 16:11:59,681 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 16:11:59,681 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 16:11:59,681 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 16:11:59,682 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 16:11:59,682 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 16:11:59,682 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 16:11:59,683 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 16:11:59,683 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 16:11:59,683 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 16:11:59,683 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 16:11:59,683 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 16:11:59,684 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 16:11:59,684 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 16:11:59,684 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 16:11:59,684 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 16:11:59,685 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 16:11:59,685 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 16:11:59,685 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 16:11:59,686 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 16:11:59,686 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 16:11:59,686 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 16:11:59,686 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:11:59,687 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 16:11:59,687 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 16:11:59,687 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 16:11:59,687 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 16:11:59,688 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 16:11:59,688 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 16:11:59,688 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 16:11:59,844 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 16:11:59,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 16:11:59,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 16:11:59,862 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 16:11:59,862 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 16:11:59,863 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-counter-determinism.wvr.c [2023-11-17 16:12:00,871 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 16:12:01,045 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 16:12:01,046 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-determinism.wvr.c [2023-11-17 16:12:01,052 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b9caaf88/1770cb1db73946e6afde770268407452/FLAG8c5c253c6 [2023-11-17 16:12:01,068 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b9caaf88/1770cb1db73946e6afde770268407452 [2023-11-17 16:12:01,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 16:12:01,071 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 16:12:01,073 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 16:12:01,073 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 16:12:01,076 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 16:12:01,077 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:12:01" (1/1) ... [2023-11-17 16:12:01,078 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2edfe9f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:12:01, skipping insertion in model container [2023-11-17 16:12:01,078 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:12:01" (1/1) ... [2023-11-17 16:12:01,099 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 16:12:01,219 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-counter-determinism.wvr.c[2528,2541] [2023-11-17 16:12:01,222 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:12:01,240 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 16:12:01,261 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-counter-determinism.wvr.c[2528,2541] [2023-11-17 16:12:01,262 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:12:01,267 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:12:01,268 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:12:01,274 INFO L206 MainTranslator]: Completed translation [2023-11-17 16:12:01,274 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:12:01 WrapperNode [2023-11-17 16:12:01,277 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 16:12:01,278 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 16:12:01,279 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 16:12:01,279 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 16:12:01,284 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:12:01" (1/1) ... [2023-11-17 16:12:01,289 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:12:01" (1/1) ... [2023-11-17 16:12:01,317 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 120 [2023-11-17 16:12:01,317 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 16:12:01,318 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 16:12:01,318 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 16:12:01,318 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 16:12:01,324 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:12:01" (1/1) ... [2023-11-17 16:12:01,325 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:12:01" (1/1) ... [2023-11-17 16:12:01,327 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:12:01" (1/1) ... [2023-11-17 16:12:01,327 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:12:01" (1/1) ... [2023-11-17 16:12:01,330 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:12:01" (1/1) ... [2023-11-17 16:12:01,332 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:12:01" (1/1) ... [2023-11-17 16:12:01,333 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:12:01" (1/1) ... [2023-11-17 16:12:01,334 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:12:01" (1/1) ... [2023-11-17 16:12:01,336 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 16:12:01,336 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 16:12:01,337 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 16:12:01,337 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 16:12:01,337 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:12:01" (1/1) ... [2023-11-17 16:12:01,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:12:01,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:12:01,360 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 16:12:01,363 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 16:12:01,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 16:12:01,389 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 16:12:01,389 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 16:12:01,389 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 16:12:01,390 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 16:12:01,390 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 16:12:01,390 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 16:12:01,390 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-17 16:12:01,390 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-17 16:12:01,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 16:12:01,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 16:12:01,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 16:12:01,391 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 16:12:01,391 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 16:12:01,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 16:12:01,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 16:12:01,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 16:12:01,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 16:12:01,401 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 16:12:01,484 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 16:12:01,486 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 16:12:01,706 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 16:12:01,751 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 16:12:01,751 INFO L307 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-17 16:12:01,753 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:12:01 BoogieIcfgContainer [2023-11-17 16:12:01,753 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 16:12:01,754 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 16:12:01,754 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 16:12:01,757 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 16:12:01,757 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:12:01" (1/3) ... [2023-11-17 16:12:01,757 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44f5b059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:12:01, skipping insertion in model container [2023-11-17 16:12:01,757 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:12:01" (2/3) ... [2023-11-17 16:12:01,758 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44f5b059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:12:01, skipping insertion in model container [2023-11-17 16:12:01,758 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:12:01" (3/3) ... [2023-11-17 16:12:01,758 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-determinism.wvr.c [2023-11-17 16:12:01,770 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 16:12:01,770 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 16:12:01,770 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 16:12:01,842 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 16:12:01,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 129 transitions, 286 flow [2023-11-17 16:12:01,906 INFO L124 PetriNetUnfolderBase]: 9/125 cut-off events. [2023-11-17 16:12:01,907 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 16:12:01,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 125 events. 9/125 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 113 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-11-17 16:12:01,911 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 129 transitions, 286 flow [2023-11-17 16:12:01,916 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 112 transitions, 248 flow [2023-11-17 16:12:01,937 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 16:12:01,946 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 116 places, 112 transitions, 248 flow [2023-11-17 16:12:01,948 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 116 places, 112 transitions, 248 flow [2023-11-17 16:12:01,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 112 transitions, 248 flow [2023-11-17 16:12:01,991 INFO L124 PetriNetUnfolderBase]: 9/112 cut-off events. [2023-11-17 16:12:01,991 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 16:12:01,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 112 events. 9/112 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 112 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-11-17 16:12:01,996 INFO L119 LiptonReduction]: Number of co-enabled transitions 3312 [2023-11-17 16:12:04,465 INFO L134 LiptonReduction]: Checked pairs total: 2889 [2023-11-17 16:12:04,465 INFO L136 LiptonReduction]: Total number of compositions: 90 [2023-11-17 16:12:04,483 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 16:12:04,488 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;@4fd1a25c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 16:12:04,488 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 16:12:04,492 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 16:12:04,493 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2023-11-17 16:12:04,493 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 16:12:04,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:04,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:04,493 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:12:04,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:04,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1345402121, now seen corresponding path program 1 times [2023-11-17 16:12:04,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:04,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960460389] [2023-11-17 16:12:04,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:04,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:04,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:04,891 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 16:12:04,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:04,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960460389] [2023-11-17 16:12:04,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960460389] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:12:04,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:12:04,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 16:12:04,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751158240] [2023-11-17 16:12:04,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:12:04,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:12:04,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:04,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:12:04,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:12:04,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 219 [2023-11-17 16:12:04,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:04,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:04,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 219 [2023-11-17 16:12:04,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:05,154 INFO L124 PetriNetUnfolderBase]: 1680/2288 cut-off events. [2023-11-17 16:12:05,154 INFO L125 PetriNetUnfolderBase]: For 174/174 co-relation queries the response was YES. [2023-11-17 16:12:05,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4806 conditions, 2288 events. 1680/2288 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8135 event pairs, 624 based on Foata normal form. 1/1777 useless extension candidates. Maximal degree in co-relation 3668. Up to 1345 conditions per place. [2023-11-17 16:12:05,172 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 47 selfloop transitions, 3 changer transitions 3/53 dead transitions. [2023-11-17 16:12:05,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 53 transitions, 257 flow [2023-11-17 16:12:05,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:12:05,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:12:05,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 380 transitions. [2023-11-17 16:12:05,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578386605783866 [2023-11-17 16:12:05,187 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 380 transitions. [2023-11-17 16:12:05,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 380 transitions. [2023-11-17 16:12:05,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:05,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 380 transitions. [2023-11-17 16:12:05,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:05,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:05,201 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:05,203 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 82 flow. Second operand 3 states and 380 transitions. [2023-11-17 16:12:05,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 53 transitions, 257 flow [2023-11-17 16:12:05,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 53 transitions, 227 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-17 16:12:05,211 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 89 flow [2023-11-17 16:12:05,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-11-17 16:12:05,215 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2023-11-17 16:12:05,216 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 89 flow [2023-11-17 16:12:05,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:05,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:05,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:05,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 16:12:05,217 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:12:05,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:05,218 INFO L85 PathProgramCache]: Analyzing trace with hash 736420190, now seen corresponding path program 1 times [2023-11-17 16:12:05,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:05,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015908852] [2023-11-17 16:12:05,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:05,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:05,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:05,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:05,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:05,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015908852] [2023-11-17 16:12:05,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015908852] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:12:05,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:12:05,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:12:05,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618147443] [2023-11-17 16:12:05,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:12:05,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:12:05,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:05,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:12:05,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:12:05,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 219 [2023-11-17 16:12:05,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 89 flow. Second operand has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:05,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:05,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 219 [2023-11-17 16:12:05,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:05,618 INFO L124 PetriNetUnfolderBase]: 2172/2912 cut-off events. [2023-11-17 16:12:05,619 INFO L125 PetriNetUnfolderBase]: For 550/550 co-relation queries the response was YES. [2023-11-17 16:12:05,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6848 conditions, 2912 events. 2172/2912 cut-off events. For 550/550 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10628 event pairs, 1035 based on Foata normal form. 42/2954 useless extension candidates. Maximal degree in co-relation 2270. Up to 2170 conditions per place. [2023-11-17 16:12:05,631 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 69 selfloop transitions, 11 changer transitions 0/80 dead transitions. [2023-11-17 16:12:05,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 80 transitions, 386 flow [2023-11-17 16:12:05,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:12:05,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:12:05,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 540 transitions. [2023-11-17 16:12:05,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4931506849315068 [2023-11-17 16:12:05,634 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 540 transitions. [2023-11-17 16:12:05,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 540 transitions. [2023-11-17 16:12:05,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:05,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 540 transitions. [2023-11-17 16:12:05,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:05,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:05,638 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:05,638 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 89 flow. Second operand 5 states and 540 transitions. [2023-11-17 16:12:05,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 80 transitions, 386 flow [2023-11-17 16:12:05,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 80 transitions, 379 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 16:12:05,643 INFO L231 Difference]: Finished difference. Result has 38 places, 40 transitions, 156 flow [2023-11-17 16:12:05,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=156, PETRI_PLACES=38, PETRI_TRANSITIONS=40} [2023-11-17 16:12:05,644 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2023-11-17 16:12:05,644 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 40 transitions, 156 flow [2023-11-17 16:12:05,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:05,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:05,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:05,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 16:12:05,651 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:12:05,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:05,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1439490771, now seen corresponding path program 1 times [2023-11-17 16:12:05,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:05,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465795008] [2023-11-17 16:12:05,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:05,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:05,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:05,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:05,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465795008] [2023-11-17 16:12:05,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465795008] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:12:05,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:12:05,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:12:05,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094948145] [2023-11-17 16:12:05,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:12:05,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:12:05,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:05,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:12:05,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:12:05,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 219 [2023-11-17 16:12:05,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 40 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:05,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:05,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 219 [2023-11-17 16:12:05,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:06,025 INFO L124 PetriNetUnfolderBase]: 2519/3411 cut-off events. [2023-11-17 16:12:06,025 INFO L125 PetriNetUnfolderBase]: For 1926/1926 co-relation queries the response was YES. [2023-11-17 16:12:06,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9524 conditions, 3411 events. 2519/3411 cut-off events. For 1926/1926 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13280 event pairs, 710 based on Foata normal form. 48/3459 useless extension candidates. Maximal degree in co-relation 4569. Up to 1506 conditions per place. [2023-11-17 16:12:06,041 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 68 selfloop transitions, 8 changer transitions 17/93 dead transitions. [2023-11-17 16:12:06,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 93 transitions, 493 flow [2023-11-17 16:12:06,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:12:06,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:12:06,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 549 transitions. [2023-11-17 16:12:06,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013698630136987 [2023-11-17 16:12:06,043 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 549 transitions. [2023-11-17 16:12:06,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 549 transitions. [2023-11-17 16:12:06,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:06,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 549 transitions. [2023-11-17 16:12:06,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:06,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:06,047 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:06,047 INFO L175 Difference]: Start difference. First operand has 38 places, 40 transitions, 156 flow. Second operand 5 states and 549 transitions. [2023-11-17 16:12:06,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 93 transitions, 493 flow [2023-11-17 16:12:06,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 93 transitions, 483 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-11-17 16:12:06,051 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 171 flow [2023-11-17 16:12:06,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=171, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2023-11-17 16:12:06,052 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 6 predicate places. [2023-11-17 16:12:06,052 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 171 flow [2023-11-17 16:12:06,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:06,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:06,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:06,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 16:12:06,053 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:12:06,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:06,053 INFO L85 PathProgramCache]: Analyzing trace with hash -2097671970, now seen corresponding path program 2 times [2023-11-17 16:12:06,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:06,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501748050] [2023-11-17 16:12:06,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:06,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:06,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:06,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:06,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:06,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501748050] [2023-11-17 16:12:06,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501748050] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:12:06,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443052055] [2023-11-17 16:12:06,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:12:06,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:12:06,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:12:06,127 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 16:12:06,165 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 16:12:06,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:12:06,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:12:06,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 16:12:06,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:12:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:06,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:12:06,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:06,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443052055] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:12:06,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:12:06,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-17 16:12:06,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138478542] [2023-11-17 16:12:06,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:12:06,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 16:12:06,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:06,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 16:12:06,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-17 16:12:06,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 219 [2023-11-17 16:12:06,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 171 flow. Second operand has 8 states, 8 states have (on average 97.25) internal successors, (778), 8 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:06,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:06,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 219 [2023-11-17 16:12:06,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:06,718 INFO L124 PetriNetUnfolderBase]: 2600/3514 cut-off events. [2023-11-17 16:12:06,718 INFO L125 PetriNetUnfolderBase]: For 3078/3078 co-relation queries the response was YES. [2023-11-17 16:12:06,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10880 conditions, 3514 events. 2600/3514 cut-off events. For 3078/3078 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13784 event pairs, 715 based on Foata normal form. 70/3584 useless extension candidates. Maximal degree in co-relation 5427. Up to 1350 conditions per place. [2023-11-17 16:12:06,734 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 110 selfloop transitions, 14 changer transitions 0/124 dead transitions. [2023-11-17 16:12:06,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 124 transitions, 687 flow [2023-11-17 16:12:06,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:12:06,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:12:06,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 768 transitions. [2023-11-17 16:12:06,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5009784735812133 [2023-11-17 16:12:06,736 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 768 transitions. [2023-11-17 16:12:06,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 768 transitions. [2023-11-17 16:12:06,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:06,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 768 transitions. [2023-11-17 16:12:06,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 109.71428571428571) internal successors, (768), 7 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:06,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:06,741 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:06,768 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 171 flow. Second operand 7 states and 768 transitions. [2023-11-17 16:12:06,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 124 transitions, 687 flow [2023-11-17 16:12:06,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 124 transitions, 658 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-11-17 16:12:06,775 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 222 flow [2023-11-17 16:12:06,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=222, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2023-11-17 16:12:06,776 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 10 predicate places. [2023-11-17 16:12:06,776 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 222 flow [2023-11-17 16:12:06,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 97.25) internal successors, (778), 8 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:06,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:06,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:06,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-17 16:12:06,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:12:06,983 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:12:06,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:06,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1066375187, now seen corresponding path program 2 times [2023-11-17 16:12:06,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:06,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012071012] [2023-11-17 16:12:06,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:06,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:07,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:07,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:07,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012071012] [2023-11-17 16:12:07,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012071012] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:12:07,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:12:07,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:12:07,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770315048] [2023-11-17 16:12:07,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:12:07,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:12:07,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:07,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:12:07,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:12:07,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 219 [2023-11-17 16:12:07,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 222 flow. Second operand has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:07,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:07,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 219 [2023-11-17 16:12:07,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:07,462 INFO L124 PetriNetUnfolderBase]: 3666/4958 cut-off events. [2023-11-17 16:12:07,462 INFO L125 PetriNetUnfolderBase]: For 8672/8672 co-relation queries the response was YES. [2023-11-17 16:12:07,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16545 conditions, 4958 events. 3666/4958 cut-off events. For 8672/8672 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 20446 event pairs, 922 based on Foata normal form. 72/5030 useless extension candidates. Maximal degree in co-relation 7437. Up to 2154 conditions per place. [2023-11-17 16:12:07,487 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 96 selfloop transitions, 12 changer transitions 2/110 dead transitions. [2023-11-17 16:12:07,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 110 transitions, 709 flow [2023-11-17 16:12:07,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:12:07,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:12:07,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 549 transitions. [2023-11-17 16:12:07,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013698630136987 [2023-11-17 16:12:07,489 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 549 transitions. [2023-11-17 16:12:07,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 549 transitions. [2023-11-17 16:12:07,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:07,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 549 transitions. [2023-11-17 16:12:07,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:07,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:07,492 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:07,492 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 222 flow. Second operand 5 states and 549 transitions. [2023-11-17 16:12:07,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 110 transitions, 709 flow [2023-11-17 16:12:07,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 110 transitions, 658 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-11-17 16:12:07,517 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 270 flow [2023-11-17 16:12:07,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=270, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2023-11-17 16:12:07,518 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 15 predicate places. [2023-11-17 16:12:07,518 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 270 flow [2023-11-17 16:12:07,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:07,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:07,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:07,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 16:12:07,519 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:12:07,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:07,519 INFO L85 PathProgramCache]: Analyzing trace with hash -723902939, now seen corresponding path program 3 times [2023-11-17 16:12:07,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:07,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434999414] [2023-11-17 16:12:07,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:07,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:07,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:07,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:07,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434999414] [2023-11-17 16:12:07,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434999414] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:12:07,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:12:07,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:12:07,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620107394] [2023-11-17 16:12:07,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:12:07,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:12:07,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:07,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:12:07,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:12:07,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 219 [2023-11-17 16:12:07,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 270 flow. Second operand has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:07,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:07,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 219 [2023-11-17 16:12:07,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:07,945 INFO L124 PetriNetUnfolderBase]: 3996/5404 cut-off events. [2023-11-17 16:12:07,945 INFO L125 PetriNetUnfolderBase]: For 15169/15169 co-relation queries the response was YES. [2023-11-17 16:12:07,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19956 conditions, 5404 events. 3996/5404 cut-off events. For 15169/15169 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 22049 event pairs, 1885 based on Foata normal form. 48/5452 useless extension candidates. Maximal degree in co-relation 8196. Up to 4134 conditions per place. [2023-11-17 16:12:07,981 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 67 selfloop transitions, 15 changer transitions 16/98 dead transitions. [2023-11-17 16:12:07,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 98 transitions, 713 flow [2023-11-17 16:12:07,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:12:07,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:12:07,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 536 transitions. [2023-11-17 16:12:07,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4894977168949772 [2023-11-17 16:12:07,983 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 536 transitions. [2023-11-17 16:12:07,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 536 transitions. [2023-11-17 16:12:07,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:07,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 536 transitions. [2023-11-17 16:12:07,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 107.2) internal successors, (536), 5 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:07,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:07,986 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:07,986 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 270 flow. Second operand 5 states and 536 transitions. [2023-11-17 16:12:07,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 98 transitions, 713 flow [2023-11-17 16:12:08,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 98 transitions, 674 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-11-17 16:12:08,017 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 355 flow [2023-11-17 16:12:08,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=355, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2023-11-17 16:12:08,020 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 21 predicate places. [2023-11-17 16:12:08,020 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 355 flow [2023-11-17 16:12:08,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:08,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:08,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:08,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 16:12:08,021 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:12:08,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:08,021 INFO L85 PathProgramCache]: Analyzing trace with hash 2051802426, now seen corresponding path program 3 times [2023-11-17 16:12:08,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:08,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622537572] [2023-11-17 16:12:08,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:08,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:08,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:08,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:08,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622537572] [2023-11-17 16:12:08,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622537572] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:12:08,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111150266] [2023-11-17 16:12:08,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:12:08,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:12:08,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:12:08,109 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 16:12:08,144 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 16:12:08,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:12:08,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:12:08,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 16:12:08,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:12:08,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:08,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:12:08,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:08,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111150266] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:12:08,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:12:08,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-17 16:12:08,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567239462] [2023-11-17 16:12:08,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:12:08,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:12:08,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:08,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:12:08,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-17 16:12:08,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 219 [2023-11-17 16:12:08,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 355 flow. Second operand has 10 states, 10 states have (on average 96.9) internal successors, (969), 10 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:08,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:08,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 219 [2023-11-17 16:12:08,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:08,760 INFO L124 PetriNetUnfolderBase]: 4040/5450 cut-off events. [2023-11-17 16:12:08,761 INFO L125 PetriNetUnfolderBase]: For 17892/17892 co-relation queries the response was YES. [2023-11-17 16:12:08,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21977 conditions, 5450 events. 4040/5450 cut-off events. For 17892/17892 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 22244 event pairs, 1602 based on Foata normal form. 70/5520 useless extension candidates. Maximal degree in co-relation 12019. Up to 3835 conditions per place. [2023-11-17 16:12:08,783 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 104 selfloop transitions, 20 changer transitions 0/124 dead transitions. [2023-11-17 16:12:08,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 124 transitions, 957 flow [2023-11-17 16:12:08,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:12:08,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:12:08,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 650 transitions. [2023-11-17 16:12:08,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4946727549467275 [2023-11-17 16:12:08,786 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 650 transitions. [2023-11-17 16:12:08,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 650 transitions. [2023-11-17 16:12:08,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:08,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 650 transitions. [2023-11-17 16:12:08,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 108.33333333333333) internal successors, (650), 6 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:08,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 219.0) internal successors, (1533), 7 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:08,789 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 219.0) internal successors, (1533), 7 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:08,789 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 355 flow. Second operand 6 states and 650 transitions. [2023-11-17 16:12:08,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 124 transitions, 957 flow [2023-11-17 16:12:08,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 124 transitions, 910 flow, removed 16 selfloop flow, removed 2 redundant places. [2023-11-17 16:12:08,819 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 494 flow [2023-11-17 16:12:08,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=494, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2023-11-17 16:12:08,820 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2023-11-17 16:12:08,820 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 494 flow [2023-11-17 16:12:08,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 96.9) internal successors, (969), 10 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:08,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:08,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:08,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 16:12:09,025 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,SelfDestructingSolverStorable6 [2023-11-17 16:12:09,026 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:12:09,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:09,026 INFO L85 PathProgramCache]: Analyzing trace with hash 212846036, now seen corresponding path program 4 times [2023-11-17 16:12:09,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:09,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743253716] [2023-11-17 16:12:09,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:09,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:09,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:09,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:09,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:09,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743253716] [2023-11-17 16:12:09,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743253716] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:12:09,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:12:09,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:12:09,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843080906] [2023-11-17 16:12:09,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:12:09,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:12:09,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:09,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:12:09,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:12:09,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 219 [2023-11-17 16:12:09,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 494 flow. Second operand has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:09,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:09,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 219 [2023-11-17 16:12:09,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:09,497 INFO L124 PetriNetUnfolderBase]: 4132/5592 cut-off events. [2023-11-17 16:12:09,497 INFO L125 PetriNetUnfolderBase]: For 17978/17978 co-relation queries the response was YES. [2023-11-17 16:12:09,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23566 conditions, 5592 events. 4132/5592 cut-off events. For 17978/17978 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 23779 event pairs, 929 based on Foata normal form. 58/5650 useless extension candidates. Maximal degree in co-relation 16998. Up to 2257 conditions per place. [2023-11-17 16:12:09,522 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 107 selfloop transitions, 16 changer transitions 5/128 dead transitions. [2023-11-17 16:12:09,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 128 transitions, 1059 flow [2023-11-17 16:12:09,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:12:09,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:12:09,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 547 transitions. [2023-11-17 16:12:09,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4995433789954338 [2023-11-17 16:12:09,524 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 547 transitions. [2023-11-17 16:12:09,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 547 transitions. [2023-11-17 16:12:09,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:09,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 547 transitions. [2023-11-17 16:12:09,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.4) internal successors, (547), 5 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:09,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:09,526 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:09,526 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 494 flow. Second operand 5 states and 547 transitions. [2023-11-17 16:12:09,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 128 transitions, 1059 flow [2023-11-17 16:12:09,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 128 transitions, 1007 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-11-17 16:12:09,650 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 511 flow [2023-11-17 16:12:09,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=511, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2023-11-17 16:12:09,651 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 30 predicate places. [2023-11-17 16:12:09,651 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 511 flow [2023-11-17 16:12:09,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:09,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:09,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:09,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 16:12:09,651 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:12:09,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:09,652 INFO L85 PathProgramCache]: Analyzing trace with hash 131720587, now seen corresponding path program 4 times [2023-11-17 16:12:09,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:09,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409043639] [2023-11-17 16:12:09,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:09,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:09,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:09,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:09,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:09,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409043639] [2023-11-17 16:12:09,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409043639] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:12:09,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:12:09,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:12:09,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151732531] [2023-11-17 16:12:09,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:12:09,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:12:09,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:09,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:12:09,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:12:09,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 219 [2023-11-17 16:12:09,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 511 flow. Second operand has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:09,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:09,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 219 [2023-11-17 16:12:09,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:10,168 INFO L124 PetriNetUnfolderBase]: 4778/6404 cut-off events. [2023-11-17 16:12:10,169 INFO L125 PetriNetUnfolderBase]: For 28015/28015 co-relation queries the response was YES. [2023-11-17 16:12:10,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26768 conditions, 6404 events. 4778/6404 cut-off events. For 28015/28015 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 26353 event pairs, 1857 based on Foata normal form. 48/6452 useless extension candidates. Maximal degree in co-relation 18150. Up to 5058 conditions per place. [2023-11-17 16:12:10,196 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 95 selfloop transitions, 19 changer transitions 19/133 dead transitions. [2023-11-17 16:12:10,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 133 transitions, 1230 flow [2023-11-17 16:12:10,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:12:10,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:12:10,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 536 transitions. [2023-11-17 16:12:10,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4894977168949772 [2023-11-17 16:12:10,198 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 536 transitions. [2023-11-17 16:12:10,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 536 transitions. [2023-11-17 16:12:10,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:10,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 536 transitions. [2023-11-17 16:12:10,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 107.2) internal successors, (536), 5 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:10,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:10,201 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:10,201 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 511 flow. Second operand 5 states and 536 transitions. [2023-11-17 16:12:10,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 133 transitions, 1230 flow [2023-11-17 16:12:10,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 133 transitions, 1169 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-17 16:12:10,235 INFO L231 Difference]: Finished difference. Result has 72 places, 78 transitions, 660 flow [2023-11-17 16:12:10,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=660, PETRI_PLACES=72, PETRI_TRANSITIONS=78} [2023-11-17 16:12:10,235 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 34 predicate places. [2023-11-17 16:12:10,236 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 78 transitions, 660 flow [2023-11-17 16:12:10,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:10,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:10,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:10,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 16:12:10,236 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:12:10,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:10,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1855436325, now seen corresponding path program 5 times [2023-11-17 16:12:10,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:10,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434927850] [2023-11-17 16:12:10,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:10,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:10,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:10,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:10,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434927850] [2023-11-17 16:12:10,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434927850] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:12:10,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:12:10,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:12:10,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389505516] [2023-11-17 16:12:10,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:12:10,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:12:10,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:10,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:12:10,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:12:10,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 219 [2023-11-17 16:12:10,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 78 transitions, 660 flow. Second operand has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:10,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:10,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 219 [2023-11-17 16:12:10,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:10,964 INFO L124 PetriNetUnfolderBase]: 5348/7216 cut-off events. [2023-11-17 16:12:10,964 INFO L125 PetriNetUnfolderBase]: For 29108/29108 co-relation queries the response was YES. [2023-11-17 16:12:10,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31892 conditions, 7216 events. 5348/7216 cut-off events. For 29108/29108 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 31066 event pairs, 1019 based on Foata normal form. 128/7344 useless extension candidates. Maximal degree in co-relation 22094. Up to 3310 conditions per place. [2023-11-17 16:12:10,999 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 137 selfloop transitions, 18 changer transitions 9/164 dead transitions. [2023-11-17 16:12:10,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 164 transitions, 1558 flow [2023-11-17 16:12:11,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:12:11,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:12:11,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 545 transitions. [2023-11-17 16:12:11,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4977168949771689 [2023-11-17 16:12:11,001 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 545 transitions. [2023-11-17 16:12:11,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 545 transitions. [2023-11-17 16:12:11,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:11,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 545 transitions. [2023-11-17 16:12:11,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.0) internal successors, (545), 5 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:11,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:11,004 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:11,004 INFO L175 Difference]: Start difference. First operand has 72 places, 78 transitions, 660 flow. Second operand 5 states and 545 transitions. [2023-11-17 16:12:11,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 164 transitions, 1558 flow [2023-11-17 16:12:11,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 164 transitions, 1544 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-11-17 16:12:11,089 INFO L231 Difference]: Finished difference. Result has 77 places, 82 transitions, 761 flow [2023-11-17 16:12:11,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=648, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=761, PETRI_PLACES=77, PETRI_TRANSITIONS=82} [2023-11-17 16:12:11,090 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 39 predicate places. [2023-11-17 16:12:11,090 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 82 transitions, 761 flow [2023-11-17 16:12:11,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:11,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:11,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:11,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 16:12:11,092 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:12:11,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:11,092 INFO L85 PathProgramCache]: Analyzing trace with hash -209651284, now seen corresponding path program 5 times [2023-11-17 16:12:11,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:11,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721845283] [2023-11-17 16:12:11,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:11,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:11,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:11,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:11,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721845283] [2023-11-17 16:12:11,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721845283] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:12:11,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751366206] [2023-11-17 16:12:11,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:12:11,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:12:11,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:12:11,207 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 16:12:11,209 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 16:12:11,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:12:11,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:12:11,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 16:12:11,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:12:11,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:11,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:12:11,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:11,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751366206] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:12:11,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:12:11,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-17 16:12:11,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437997090] [2023-11-17 16:12:11,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:12:11,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 16:12:11,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:11,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 16:12:11,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-17 16:12:11,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 219 [2023-11-17 16:12:11,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 82 transitions, 761 flow. Second operand has 8 states, 8 states have (on average 97.625) internal successors, (781), 8 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:11,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:11,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 219 [2023-11-17 16:12:11,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:11,985 INFO L124 PetriNetUnfolderBase]: 5826/7854 cut-off events. [2023-11-17 16:12:11,985 INFO L125 PetriNetUnfolderBase]: For 36075/36075 co-relation queries the response was YES. [2023-11-17 16:12:11,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35118 conditions, 7854 events. 5826/7854 cut-off events. For 36075/36075 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 34758 event pairs, 805 based on Foata normal form. 194/8048 useless extension candidates. Maximal degree in co-relation 26449. Up to 2725 conditions per place. [2023-11-17 16:12:12,022 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 140 selfloop transitions, 37 changer transitions 4/181 dead transitions. [2023-11-17 16:12:12,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 181 transitions, 1662 flow [2023-11-17 16:12:12,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:12:12,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:12:12,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 766 transitions. [2023-11-17 16:12:12,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49967384213959554 [2023-11-17 16:12:12,025 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 766 transitions. [2023-11-17 16:12:12,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 766 transitions. [2023-11-17 16:12:12,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:12,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 766 transitions. [2023-11-17 16:12:12,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 109.42857142857143) internal successors, (766), 7 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:12,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:12,028 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:12,028 INFO L175 Difference]: Start difference. First operand has 77 places, 82 transitions, 761 flow. Second operand 7 states and 766 transitions. [2023-11-17 16:12:12,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 181 transitions, 1662 flow [2023-11-17 16:12:12,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 181 transitions, 1615 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-17 16:12:12,153 INFO L231 Difference]: Finished difference. Result has 83 places, 88 transitions, 883 flow [2023-11-17 16:12:12,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=883, PETRI_PLACES=83, PETRI_TRANSITIONS=88} [2023-11-17 16:12:12,154 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 45 predicate places. [2023-11-17 16:12:12,154 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 88 transitions, 883 flow [2023-11-17 16:12:12,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 97.625) internal successors, (781), 8 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:12,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:12,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:12,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-17 16:12:12,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:12:12,360 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:12:12,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:12,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1138651923, now seen corresponding path program 6 times [2023-11-17 16:12:12,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:12,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550202863] [2023-11-17 16:12:12,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:12,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:12,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:12,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:12,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550202863] [2023-11-17 16:12:12,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550202863] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:12:12,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:12:12,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:12:12,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723185642] [2023-11-17 16:12:12,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:12:12,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:12:12,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:12,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:12:12,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:12:12,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 219 [2023-11-17 16:12:12,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 88 transitions, 883 flow. Second operand has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:12,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:12,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 219 [2023-11-17 16:12:12,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:12,943 INFO L124 PetriNetUnfolderBase]: 6100/8196 cut-off events. [2023-11-17 16:12:12,944 INFO L125 PetriNetUnfolderBase]: For 48420/48420 co-relation queries the response was YES. [2023-11-17 16:12:12,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38488 conditions, 8196 events. 6100/8196 cut-off events. For 48420/48420 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 35367 event pairs, 2226 based on Foata normal form. 112/8308 useless extension candidates. Maximal degree in co-relation 28943. Up to 6337 conditions per place. [2023-11-17 16:12:12,986 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 91 selfloop transitions, 35 changer transitions 2/128 dead transitions. [2023-11-17 16:12:12,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 128 transitions, 1351 flow [2023-11-17 16:12:12,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:12:12,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:12:12,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 535 transitions. [2023-11-17 16:12:12,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4885844748858447 [2023-11-17 16:12:12,988 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 535 transitions. [2023-11-17 16:12:12,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 535 transitions. [2023-11-17 16:12:12,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:12,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 535 transitions. [2023-11-17 16:12:12,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:12,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:12,991 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:12,991 INFO L175 Difference]: Start difference. First operand has 83 places, 88 transitions, 883 flow. Second operand 5 states and 535 transitions. [2023-11-17 16:12:12,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 128 transitions, 1351 flow [2023-11-17 16:12:13,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 128 transitions, 1267 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-11-17 16:12:13,151 INFO L231 Difference]: Finished difference. Result has 85 places, 91 transitions, 911 flow [2023-11-17 16:12:13,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=911, PETRI_PLACES=85, PETRI_TRANSITIONS=91} [2023-11-17 16:12:13,152 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 47 predicate places. [2023-11-17 16:12:13,152 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 91 transitions, 911 flow [2023-11-17 16:12:13,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:13,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:13,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:13,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-17 16:12:13,153 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:12:13,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:13,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1651066860, now seen corresponding path program 6 times [2023-11-17 16:12:13,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:13,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666385821] [2023-11-17 16:12:13,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:13,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:13,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:13,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:13,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:13,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666385821] [2023-11-17 16:12:13,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666385821] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:12:13,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:12:13,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:12:13,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369141881] [2023-11-17 16:12:13,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:12:13,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:12:13,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:13,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:12:13,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:12:13,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 219 [2023-11-17 16:12:13,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 91 transitions, 911 flow. Second operand has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:13,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:13,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 219 [2023-11-17 16:12:13,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:13,824 INFO L124 PetriNetUnfolderBase]: 6169/8305 cut-off events. [2023-11-17 16:12:13,824 INFO L125 PetriNetUnfolderBase]: For 46050/46050 co-relation queries the response was YES. [2023-11-17 16:12:13,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38669 conditions, 8305 events. 6169/8305 cut-off events. For 46050/46050 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 36320 event pairs, 1954 based on Foata normal form. 32/8337 useless extension candidates. Maximal degree in co-relation 30287. Up to 5380 conditions per place. [2023-11-17 16:12:13,950 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 136 selfloop transitions, 16 changer transitions 21/173 dead transitions. [2023-11-17 16:12:13,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 173 transitions, 1890 flow [2023-11-17 16:12:13,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:12:13,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:12:13,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 541 transitions. [2023-11-17 16:12:13,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4940639269406393 [2023-11-17 16:12:13,952 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 541 transitions. [2023-11-17 16:12:13,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 541 transitions. [2023-11-17 16:12:13,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:13,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 541 transitions. [2023-11-17 16:12:13,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 108.2) internal successors, (541), 5 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:13,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:13,955 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:13,955 INFO L175 Difference]: Start difference. First operand has 85 places, 91 transitions, 911 flow. Second operand 5 states and 541 transitions. [2023-11-17 16:12:13,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 173 transitions, 1890 flow [2023-11-17 16:12:14,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 173 transitions, 1784 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-17 16:12:14,106 INFO L231 Difference]: Finished difference. Result has 88 places, 91 transitions, 888 flow [2023-11-17 16:12:14,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=888, PETRI_PLACES=88, PETRI_TRANSITIONS=91} [2023-11-17 16:12:14,106 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 50 predicate places. [2023-11-17 16:12:14,106 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 91 transitions, 888 flow [2023-11-17 16:12:14,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:14,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:14,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:14,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-17 16:12:14,107 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:12:14,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:14,107 INFO L85 PathProgramCache]: Analyzing trace with hash -121862146, now seen corresponding path program 7 times [2023-11-17 16:12:14,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:14,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131054204] [2023-11-17 16:12:14,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:14,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:14,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:14,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:14,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:14,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131054204] [2023-11-17 16:12:14,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131054204] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:12:14,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:12:14,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:12:14,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746300069] [2023-11-17 16:12:14,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:12:14,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:12:14,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:14,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:12:14,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:12:14,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 219 [2023-11-17 16:12:14,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 91 transitions, 888 flow. Second operand has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:14,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:14,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 219 [2023-11-17 16:12:14,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:14,915 INFO L124 PetriNetUnfolderBase]: 6894/9262 cut-off events. [2023-11-17 16:12:14,915 INFO L125 PetriNetUnfolderBase]: For 55824/55824 co-relation queries the response was YES. [2023-11-17 16:12:14,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43526 conditions, 9262 events. 6894/9262 cut-off events. For 55824/55824 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 41138 event pairs, 2306 based on Foata normal form. 106/9368 useless extension candidates. Maximal degree in co-relation 37399. Up to 6551 conditions per place. [2023-11-17 16:12:14,952 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 102 selfloop transitions, 61 changer transitions 6/169 dead transitions. [2023-11-17 16:12:14,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 169 transitions, 1974 flow [2023-11-17 16:12:14,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:12:14,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:12:14,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 532 transitions. [2023-11-17 16:12:14,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4858447488584475 [2023-11-17 16:12:14,954 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 532 transitions. [2023-11-17 16:12:14,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 532 transitions. [2023-11-17 16:12:14,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:14,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 532 transitions. [2023-11-17 16:12:14,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 106.4) internal successors, (532), 5 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:14,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:14,957 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:14,957 INFO L175 Difference]: Start difference. First operand has 88 places, 91 transitions, 888 flow. Second operand 5 states and 532 transitions. [2023-11-17 16:12:14,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 169 transitions, 1974 flow [2023-11-17 16:12:15,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 169 transitions, 1889 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-11-17 16:12:15,108 INFO L231 Difference]: Finished difference. Result has 90 places, 122 transitions, 1406 flow [2023-11-17 16:12:15,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=847, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1406, PETRI_PLACES=90, PETRI_TRANSITIONS=122} [2023-11-17 16:12:15,109 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 52 predicate places. [2023-11-17 16:12:15,109 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 122 transitions, 1406 flow [2023-11-17 16:12:15,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:15,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:15,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:15,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-17 16:12:15,109 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:12:15,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:15,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1080056932, now seen corresponding path program 8 times [2023-11-17 16:12:15,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:15,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305785005] [2023-11-17 16:12:15,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:15,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:15,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:15,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:15,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305785005] [2023-11-17 16:12:15,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305785005] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:12:15,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:12:15,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:12:15,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097858011] [2023-11-17 16:12:15,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:12:15,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:12:15,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:15,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:12:15,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:12:15,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 219 [2023-11-17 16:12:15,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 122 transitions, 1406 flow. Second operand has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:15,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:15,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 219 [2023-11-17 16:12:15,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:15,946 INFO L124 PetriNetUnfolderBase]: 6995/9423 cut-off events. [2023-11-17 16:12:15,946 INFO L125 PetriNetUnfolderBase]: For 56085/56085 co-relation queries the response was YES. [2023-11-17 16:12:15,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47450 conditions, 9423 events. 6995/9423 cut-off events. For 56085/56085 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 42136 event pairs, 2698 based on Foata normal form. 40/9463 useless extension candidates. Maximal degree in co-relation 39416. Up to 6611 conditions per place. [2023-11-17 16:12:16,074 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 79 selfloop transitions, 61 changer transitions 25/165 dead transitions. [2023-11-17 16:12:16,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 165 transitions, 2104 flow [2023-11-17 16:12:16,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:12:16,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:12:16,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 531 transitions. [2023-11-17 16:12:16,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4849315068493151 [2023-11-17 16:12:16,084 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 531 transitions. [2023-11-17 16:12:16,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 531 transitions. [2023-11-17 16:12:16,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:16,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 531 transitions. [2023-11-17 16:12:16,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 106.2) internal successors, (531), 5 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:16,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:16,105 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:16,105 INFO L175 Difference]: Start difference. First operand has 90 places, 122 transitions, 1406 flow. Second operand 5 states and 531 transitions. [2023-11-17 16:12:16,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 165 transitions, 2104 flow [2023-11-17 16:12:16,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 165 transitions, 2032 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 16:12:16,275 INFO L231 Difference]: Finished difference. Result has 93 places, 120 transitions, 1442 flow [2023-11-17 16:12:16,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=1346, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1442, PETRI_PLACES=93, PETRI_TRANSITIONS=120} [2023-11-17 16:12:16,277 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 55 predicate places. [2023-11-17 16:12:16,277 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 120 transitions, 1442 flow [2023-11-17 16:12:16,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:16,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:16,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:16,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-17 16:12:16,278 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:12:16,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:16,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1992347966, now seen corresponding path program 9 times [2023-11-17 16:12:16,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:16,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726347871] [2023-11-17 16:12:16,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:16,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:16,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:16,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:16,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726347871] [2023-11-17 16:12:16,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726347871] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:12:16,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332466803] [2023-11-17 16:12:16,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:12:16,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:12:16,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:12:16,382 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 16:12:16,384 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 16:12:16,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:12:16,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:12:16,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 16:12:16,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:12:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:16,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:12:16,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:16,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332466803] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:12:16,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:12:16,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-17 16:12:16,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601296614] [2023-11-17 16:12:16,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:12:16,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:12:16,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:16,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:12:16,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-17 16:12:16,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 219 [2023-11-17 16:12:16,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 120 transitions, 1442 flow. Second operand has 10 states, 10 states have (on average 96.7) internal successors, (967), 10 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:16,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:16,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 219 [2023-11-17 16:12:16,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:17,438 INFO L124 PetriNetUnfolderBase]: 7052/9528 cut-off events. [2023-11-17 16:12:17,439 INFO L125 PetriNetUnfolderBase]: For 56504/56504 co-relation queries the response was YES. [2023-11-17 16:12:17,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46921 conditions, 9528 events. 7052/9528 cut-off events. For 56504/56504 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 43588 event pairs, 1774 based on Foata normal form. 136/9664 useless extension candidates. Maximal degree in co-relation 37993. Up to 4139 conditions per place. [2023-11-17 16:12:17,478 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 173 selfloop transitions, 78 changer transitions 0/251 dead transitions. [2023-11-17 16:12:17,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 251 transitions, 2734 flow [2023-11-17 16:12:17,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 16:12:17,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 16:12:17,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1080 transitions. [2023-11-17 16:12:17,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4931506849315068 [2023-11-17 16:12:17,481 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1080 transitions. [2023-11-17 16:12:17,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1080 transitions. [2023-11-17 16:12:17,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:17,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1080 transitions. [2023-11-17 16:12:17,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 108.0) internal successors, (1080), 10 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:17,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 219.0) internal successors, (2409), 11 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:17,487 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 219.0) internal successors, (2409), 11 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:17,487 INFO L175 Difference]: Start difference. First operand has 93 places, 120 transitions, 1442 flow. Second operand 10 states and 1080 transitions. [2023-11-17 16:12:17,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 251 transitions, 2734 flow [2023-11-17 16:12:17,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 251 transitions, 2608 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-17 16:12:17,766 INFO L231 Difference]: Finished difference. Result has 102 places, 129 transitions, 1600 flow [2023-11-17 16:12:17,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=1320, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1600, PETRI_PLACES=102, PETRI_TRANSITIONS=129} [2023-11-17 16:12:17,767 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 64 predicate places. [2023-11-17 16:12:17,767 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 129 transitions, 1600 flow [2023-11-17 16:12:17,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 96.7) internal successors, (967), 10 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:17,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:17,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:17,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-17 16:12:17,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-17 16:12:17,976 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:12:17,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:17,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1406955709, now seen corresponding path program 7 times [2023-11-17 16:12:17,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:17,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110604764] [2023-11-17 16:12:17,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:17,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:17,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:18,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:18,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:18,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110604764] [2023-11-17 16:12:18,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110604764] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:12:18,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:12:18,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:12:18,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797145539] [2023-11-17 16:12:18,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:12:18,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:12:18,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:18,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:12:18,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:12:18,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 219 [2023-11-17 16:12:18,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 129 transitions, 1600 flow. Second operand has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:18,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:18,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 219 [2023-11-17 16:12:18,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:18,918 INFO L124 PetriNetUnfolderBase]: 6430/8726 cut-off events. [2023-11-17 16:12:18,918 INFO L125 PetriNetUnfolderBase]: For 62802/62802 co-relation queries the response was YES. [2023-11-17 16:12:18,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44463 conditions, 8726 events. 6430/8726 cut-off events. For 62802/62802 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 39666 event pairs, 2074 based on Foata normal form. 192/8918 useless extension candidates. Maximal degree in co-relation 41866. Up to 6233 conditions per place. [2023-11-17 16:12:18,962 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 137 selfloop transitions, 28 changer transitions 26/191 dead transitions. [2023-11-17 16:12:18,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 191 transitions, 2434 flow [2023-11-17 16:12:18,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:12:18,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:12:18,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 535 transitions. [2023-11-17 16:12:18,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4885844748858447 [2023-11-17 16:12:18,966 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 535 transitions. [2023-11-17 16:12:18,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 535 transitions. [2023-11-17 16:12:18,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:18,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 535 transitions. [2023-11-17 16:12:18,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:18,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:18,968 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:18,968 INFO L175 Difference]: Start difference. First operand has 102 places, 129 transitions, 1600 flow. Second operand 5 states and 535 transitions. [2023-11-17 16:12:18,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 191 transitions, 2434 flow [2023-11-17 16:12:19,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 191 transitions, 2249 flow, removed 22 selfloop flow, removed 4 redundant places. [2023-11-17 16:12:19,149 INFO L231 Difference]: Finished difference. Result has 102 places, 110 transitions, 1194 flow [2023-11-17 16:12:19,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=1460, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1194, PETRI_PLACES=102, PETRI_TRANSITIONS=110} [2023-11-17 16:12:19,149 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 64 predicate places. [2023-11-17 16:12:19,149 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 110 transitions, 1194 flow [2023-11-17 16:12:19,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:19,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:19,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:19,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-17 16:12:19,150 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:12:19,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:19,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1418317272, now seen corresponding path program 10 times [2023-11-17 16:12:19,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:19,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946995551] [2023-11-17 16:12:19,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:19,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:19,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:19,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:19,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946995551] [2023-11-17 16:12:19,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946995551] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:12:19,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:12:19,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:12:19,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546120061] [2023-11-17 16:12:19,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:12:19,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:12:19,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:19,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:12:19,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:12:19,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 219 [2023-11-17 16:12:19,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 110 transitions, 1194 flow. Second operand has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:19,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:19,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 219 [2023-11-17 16:12:19,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:19,952 INFO L124 PetriNetUnfolderBase]: 5471/7326 cut-off events. [2023-11-17 16:12:19,952 INFO L125 PetriNetUnfolderBase]: For 42717/42717 co-relation queries the response was YES. [2023-11-17 16:12:19,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36238 conditions, 7326 events. 5471/7326 cut-off events. For 42717/42717 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 30939 event pairs, 1783 based on Foata normal form. 40/7366 useless extension candidates. Maximal degree in co-relation 34358. Up to 5593 conditions per place. [2023-11-17 16:12:19,986 INFO L140 encePairwiseOnDemand]: 214/219 looper letters, 128 selfloop transitions, 21 changer transitions 8/157 dead transitions. [2023-11-17 16:12:19,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 157 transitions, 1796 flow [2023-11-17 16:12:19,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:12:19,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:12:19,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 530 transitions. [2023-11-17 16:12:19,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4840182648401826 [2023-11-17 16:12:19,988 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 530 transitions. [2023-11-17 16:12:19,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 530 transitions. [2023-11-17 16:12:19,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:19,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 530 transitions. [2023-11-17 16:12:19,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 106.0) internal successors, (530), 5 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:19,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:19,990 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:19,990 INFO L175 Difference]: Start difference. First operand has 102 places, 110 transitions, 1194 flow. Second operand 5 states and 530 transitions. [2023-11-17 16:12:19,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 157 transitions, 1796 flow [2023-11-17 16:12:20,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 157 transitions, 1644 flow, removed 20 selfloop flow, removed 11 redundant places. [2023-11-17 16:12:20,091 INFO L231 Difference]: Finished difference. Result has 92 places, 109 transitions, 1104 flow [2023-11-17 16:12:20,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1104, PETRI_PLACES=92, PETRI_TRANSITIONS=109} [2023-11-17 16:12:20,091 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 54 predicate places. [2023-11-17 16:12:20,091 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 109 transitions, 1104 flow [2023-11-17 16:12:20,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:20,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:20,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:20,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-17 16:12:20,092 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:12:20,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:20,092 INFO L85 PathProgramCache]: Analyzing trace with hash 222473164, now seen corresponding path program 11 times [2023-11-17 16:12:20,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:20,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115181453] [2023-11-17 16:12:20,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:20,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:20,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:12:20,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:20,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115181453] [2023-11-17 16:12:20,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115181453] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:12:20,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:12:20,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:12:20,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724013231] [2023-11-17 16:12:20,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:12:20,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:12:20,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:20,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:12:20,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:12:20,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 219 [2023-11-17 16:12:20,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 109 transitions, 1104 flow. Second operand has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:20,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:20,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 219 [2023-11-17 16:12:20,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:20,625 INFO L124 PetriNetUnfolderBase]: 4949/6576 cut-off events. [2023-11-17 16:12:20,626 INFO L125 PetriNetUnfolderBase]: For 34719/34719 co-relation queries the response was YES. [2023-11-17 16:12:20,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31431 conditions, 6576 events. 4949/6576 cut-off events. For 34719/34719 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 27546 event pairs, 1150 based on Foata normal form. 102/6678 useless extension candidates. Maximal degree in co-relation 28834. Up to 3518 conditions per place. [2023-11-17 16:12:20,651 INFO L140 encePairwiseOnDemand]: 214/219 looper letters, 116 selfloop transitions, 30 changer transitions 15/161 dead transitions. [2023-11-17 16:12:20,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 161 transitions, 1770 flow [2023-11-17 16:12:20,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:12:20,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:12:20,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 537 transitions. [2023-11-17 16:12:20,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4904109589041096 [2023-11-17 16:12:20,653 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 537 transitions. [2023-11-17 16:12:20,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 537 transitions. [2023-11-17 16:12:20,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:20,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 537 transitions. [2023-11-17 16:12:20,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 107.4) internal successors, (537), 5 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:20,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:20,655 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:20,655 INFO L175 Difference]: Start difference. First operand has 92 places, 109 transitions, 1104 flow. Second operand 5 states and 537 transitions. [2023-11-17 16:12:20,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 161 transitions, 1770 flow [2023-11-17 16:12:20,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 161 transitions, 1678 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-11-17 16:12:20,741 INFO L231 Difference]: Finished difference. Result has 92 places, 106 transitions, 1097 flow [2023-11-17 16:12:20,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=1033, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1097, PETRI_PLACES=92, PETRI_TRANSITIONS=106} [2023-11-17 16:12:20,742 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 54 predicate places. [2023-11-17 16:12:20,742 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 106 transitions, 1097 flow [2023-11-17 16:12:20,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:20,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:20,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:20,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-17 16:12:20,743 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:12:20,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:20,743 INFO L85 PathProgramCache]: Analyzing trace with hash 2056654077, now seen corresponding path program 1 times [2023-11-17 16:12:20,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:20,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3136985] [2023-11-17 16:12:20,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:20,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:20,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:20,787 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 16:12:20,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:20,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3136985] [2023-11-17 16:12:20,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3136985] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:12:20,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496029598] [2023-11-17 16:12:20,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:20,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:12:20,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:12:20,789 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 16:12:20,814 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 16:12:20,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:20,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 16:12:20,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:12:20,911 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 16:12:20,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:12:20,939 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 16:12:20,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496029598] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:12:20,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:12:20,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-17 16:12:20,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110304797] [2023-11-17 16:12:20,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:12:20,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:12:20,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:20,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:12:20,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-17 16:12:20,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 219 [2023-11-17 16:12:20,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 106 transitions, 1097 flow. Second operand has 10 states, 10 states have (on average 97.7) internal successors, (977), 10 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:20,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:20,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 219 [2023-11-17 16:12:20,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:21,608 INFO L124 PetriNetUnfolderBase]: 5775/7620 cut-off events. [2023-11-17 16:12:21,608 INFO L125 PetriNetUnfolderBase]: For 39638/39638 co-relation queries the response was YES. [2023-11-17 16:12:21,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37076 conditions, 7620 events. 5775/7620 cut-off events. For 39638/39638 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 31377 event pairs, 1185 based on Foata normal form. 160/7780 useless extension candidates. Maximal degree in co-relation 33461. Up to 3525 conditions per place. [2023-11-17 16:12:21,716 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 162 selfloop transitions, 72 changer transitions 0/234 dead transitions. [2023-11-17 16:12:21,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 234 transitions, 2334 flow [2023-11-17 16:12:21,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 16:12:21,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 16:12:21,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1066 transitions. [2023-11-17 16:12:21,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4867579908675799 [2023-11-17 16:12:21,737 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1066 transitions. [2023-11-17 16:12:21,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1066 transitions. [2023-11-17 16:12:21,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:21,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1066 transitions. [2023-11-17 16:12:21,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 106.6) internal successors, (1066), 10 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:21,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 219.0) internal successors, (2409), 11 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:21,747 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 219.0) internal successors, (2409), 11 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:21,747 INFO L175 Difference]: Start difference. First operand has 92 places, 106 transitions, 1097 flow. Second operand 10 states and 1066 transitions. [2023-11-17 16:12:21,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 234 transitions, 2334 flow [2023-11-17 16:12:21,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 234 transitions, 2180 flow, removed 21 selfloop flow, removed 5 redundant places. [2023-11-17 16:12:21,873 INFO L231 Difference]: Finished difference. Result has 96 places, 122 transitions, 1363 flow [2023-11-17 16:12:21,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1363, PETRI_PLACES=96, PETRI_TRANSITIONS=122} [2023-11-17 16:12:21,873 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 58 predicate places. [2023-11-17 16:12:21,873 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 122 transitions, 1363 flow [2023-11-17 16:12:21,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 97.7) internal successors, (977), 10 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:21,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:21,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:21,881 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 16:12:22,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:12:22,079 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:12:22,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:22,079 INFO L85 PathProgramCache]: Analyzing trace with hash 881640865, now seen corresponding path program 2 times [2023-11-17 16:12:22,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:22,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411261286] [2023-11-17 16:12:22,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:22,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:22,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:22,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:12:22,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:22,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411261286] [2023-11-17 16:12:22,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411261286] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:12:22,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188226875] [2023-11-17 16:12:22,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:12:22,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:12:22,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:12:22,131 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 16:12:22,161 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 16:12:22,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:12:22,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:12:22,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 16:12:22,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:12:22,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:12:22,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:12:22,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:12:22,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188226875] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:12:22,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:12:22,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-17 16:12:22,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045770890] [2023-11-17 16:12:22,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:12:22,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:12:22,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:22,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:12:22,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-17 16:12:22,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 219 [2023-11-17 16:12:22,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 122 transitions, 1363 flow. Second operand has 10 states, 10 states have (on average 97.2) internal successors, (972), 10 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:22,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:22,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 219 [2023-11-17 16:12:22,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:22,931 INFO L124 PetriNetUnfolderBase]: 5253/6930 cut-off events. [2023-11-17 16:12:22,931 INFO L125 PetriNetUnfolderBase]: For 39154/39154 co-relation queries the response was YES. [2023-11-17 16:12:22,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34370 conditions, 6930 events. 5253/6930 cut-off events. For 39154/39154 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 28046 event pairs, 1353 based on Foata normal form. 160/7090 useless extension candidates. Maximal degree in co-relation 31284. Up to 4479 conditions per place. [2023-11-17 16:12:22,969 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 164 selfloop transitions, 28 changer transitions 1/193 dead transitions. [2023-11-17 16:12:22,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 193 transitions, 2167 flow [2023-11-17 16:12:22,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:12:22,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:12:22,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 641 transitions. [2023-11-17 16:12:22,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878234398782344 [2023-11-17 16:12:22,971 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 641 transitions. [2023-11-17 16:12:22,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 641 transitions. [2023-11-17 16:12:22,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:22,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 641 transitions. [2023-11-17 16:12:22,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 106.83333333333333) internal successors, (641), 6 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:22,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 219.0) internal successors, (1533), 7 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:22,974 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 219.0) internal successors, (1533), 7 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:22,974 INFO L175 Difference]: Start difference. First operand has 96 places, 122 transitions, 1363 flow. Second operand 6 states and 641 transitions. [2023-11-17 16:12:22,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 193 transitions, 2167 flow [2023-11-17 16:12:23,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 193 transitions, 2007 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-11-17 16:12:23,138 INFO L231 Difference]: Finished difference. Result has 96 places, 127 transitions, 1341 flow [2023-11-17 16:12:23,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=1213, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1341, PETRI_PLACES=96, PETRI_TRANSITIONS=127} [2023-11-17 16:12:23,138 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 58 predicate places. [2023-11-17 16:12:23,138 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 127 transitions, 1341 flow [2023-11-17 16:12:23,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 97.2) internal successors, (972), 10 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:23,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:23,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:23,145 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 16:12:23,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:12:23,344 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:12:23,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:23,344 INFO L85 PathProgramCache]: Analyzing trace with hash -209347191, now seen corresponding path program 1 times [2023-11-17 16:12:23,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:23,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232313396] [2023-11-17 16:12:23,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:23,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:23,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:12:23,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:23,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232313396] [2023-11-17 16:12:23,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232313396] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:12:23,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348601317] [2023-11-17 16:12:23,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:23,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:12:23,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:12:23,429 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 16:12:23,460 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 16:12:23,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:23,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 16:12:23,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:12:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:12:23,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:12:23,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:12:23,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348601317] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:12:23,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:12:23,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-17 16:12:23,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265017056] [2023-11-17 16:12:23,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:12:23,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 16:12:23,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:23,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 16:12:23,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-17 16:12:23,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 219 [2023-11-17 16:12:23,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 127 transitions, 1341 flow. Second operand has 8 states, 8 states have (on average 97.625) internal successors, (781), 8 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:23,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:23,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 219 [2023-11-17 16:12:23,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:24,301 INFO L124 PetriNetUnfolderBase]: 6237/8208 cut-off events. [2023-11-17 16:12:24,302 INFO L125 PetriNetUnfolderBase]: For 36439/36439 co-relation queries the response was YES. [2023-11-17 16:12:24,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39568 conditions, 8208 events. 6237/8208 cut-off events. For 36439/36439 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 34563 event pairs, 465 based on Foata normal form. 310/8518 useless extension candidates. Maximal degree in co-relation 35638. Up to 4151 conditions per place. [2023-11-17 16:12:24,347 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 139 selfloop transitions, 96 changer transitions 0/235 dead transitions. [2023-11-17 16:12:24,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 235 transitions, 2597 flow [2023-11-17 16:12:24,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:12:24,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:12:24,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 755 transitions. [2023-11-17 16:12:24,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49249836921069795 [2023-11-17 16:12:24,349 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 755 transitions. [2023-11-17 16:12:24,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 755 transitions. [2023-11-17 16:12:24,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:24,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 755 transitions. [2023-11-17 16:12:24,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 107.85714285714286) internal successors, (755), 7 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:24,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:24,351 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:24,352 INFO L175 Difference]: Start difference. First operand has 96 places, 127 transitions, 1341 flow. Second operand 7 states and 755 transitions. [2023-11-17 16:12:24,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 235 transitions, 2597 flow [2023-11-17 16:12:24,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 235 transitions, 2413 flow, removed 18 selfloop flow, removed 8 redundant places. [2023-11-17 16:12:24,519 INFO L231 Difference]: Finished difference. Result has 95 places, 156 transitions, 1804 flow [2023-11-17 16:12:24,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=1231, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1804, PETRI_PLACES=95, PETRI_TRANSITIONS=156} [2023-11-17 16:12:24,519 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 57 predicate places. [2023-11-17 16:12:24,519 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 156 transitions, 1804 flow [2023-11-17 16:12:24,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 97.625) internal successors, (781), 8 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:24,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:24,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:24,526 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 16:12:24,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:12:24,724 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:12:24,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:24,724 INFO L85 PathProgramCache]: Analyzing trace with hash 49526123, now seen corresponding path program 2 times [2023-11-17 16:12:24,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:24,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195444731] [2023-11-17 16:12:24,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:24,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:24,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:12:24,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:24,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195444731] [2023-11-17 16:12:24,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195444731] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:12:24,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:12:24,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:12:24,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549223608] [2023-11-17 16:12:24,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:12:24,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:12:24,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:24,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:12:24,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:12:24,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 219 [2023-11-17 16:12:24,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 156 transitions, 1804 flow. Second operand has 5 states, 5 states have (on average 98.6) internal successors, (493), 5 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:24,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:24,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 219 [2023-11-17 16:12:24,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:25,581 INFO L124 PetriNetUnfolderBase]: 8894/11717 cut-off events. [2023-11-17 16:12:25,581 INFO L125 PetriNetUnfolderBase]: For 59233/59233 co-relation queries the response was YES. [2023-11-17 16:12:25,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57471 conditions, 11717 events. 8894/11717 cut-off events. For 59233/59233 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 51996 event pairs, 1834 based on Foata normal form. 78/11795 useless extension candidates. Maximal degree in co-relation 51772. Up to 6736 conditions per place. [2023-11-17 16:12:25,654 INFO L140 encePairwiseOnDemand]: 214/219 looper letters, 329 selfloop transitions, 9 changer transitions 21/359 dead transitions. [2023-11-17 16:12:25,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 359 transitions, 4696 flow [2023-11-17 16:12:25,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:12:25,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:12:25,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 538 transitions. [2023-11-17 16:12:25,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.491324200913242 [2023-11-17 16:12:25,655 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 538 transitions. [2023-11-17 16:12:25,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 538 transitions. [2023-11-17 16:12:25,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:25,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 538 transitions. [2023-11-17 16:12:25,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 107.6) internal successors, (538), 5 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:25,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:25,657 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:25,657 INFO L175 Difference]: Start difference. First operand has 95 places, 156 transitions, 1804 flow. Second operand 5 states and 538 transitions. [2023-11-17 16:12:25,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 359 transitions, 4696 flow [2023-11-17 16:12:25,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 359 transitions, 4518 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-11-17 16:12:25,949 INFO L231 Difference]: Finished difference. Result has 100 places, 158 transitions, 1820 flow [2023-11-17 16:12:25,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=1722, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1820, PETRI_PLACES=100, PETRI_TRANSITIONS=158} [2023-11-17 16:12:25,950 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 62 predicate places. [2023-11-17 16:12:25,950 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 158 transitions, 1820 flow [2023-11-17 16:12:25,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.6) internal successors, (493), 5 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:25,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:25,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:25,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-17 16:12:25,951 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:12:25,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:25,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1925970965, now seen corresponding path program 3 times [2023-11-17 16:12:25,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:25,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994262105] [2023-11-17 16:12:25,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:25,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:25,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:25,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:12:25,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:25,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994262105] [2023-11-17 16:12:25,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994262105] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:12:25,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:12:25,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 16:12:25,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872475187] [2023-11-17 16:12:25,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:12:25,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:12:25,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:25,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:12:25,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:12:25,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 219 [2023-11-17 16:12:25,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 158 transitions, 1820 flow. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:25,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:25,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 219 [2023-11-17 16:12:25,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:26,743 INFO L124 PetriNetUnfolderBase]: 7841/10370 cut-off events. [2023-11-17 16:12:26,743 INFO L125 PetriNetUnfolderBase]: For 56178/56178 co-relation queries the response was YES. [2023-11-17 16:12:26,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53424 conditions, 10370 events. 7841/10370 cut-off events. For 56178/56178 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 44862 event pairs, 2021 based on Foata normal form. 192/10562 useless extension candidates. Maximal degree in co-relation 47554. Up to 9151 conditions per place. [2023-11-17 16:12:26,824 INFO L140 encePairwiseOnDemand]: 216/219 looper letters, 131 selfloop transitions, 37 changer transitions 0/168 dead transitions. [2023-11-17 16:12:26,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 168 transitions, 2209 flow [2023-11-17 16:12:26,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:12:26,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:12:26,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2023-11-17 16:12:26,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5662100456621004 [2023-11-17 16:12:26,825 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions. [2023-11-17 16:12:26,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions. [2023-11-17 16:12:26,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:26,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions. [2023-11-17 16:12:26,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.0) internal successors, (372), 3 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 16:12:26,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:26,827 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:26,827 INFO L175 Difference]: Start difference. First operand has 100 places, 158 transitions, 1820 flow. Second operand 3 states and 372 transitions. [2023-11-17 16:12:26,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 168 transitions, 2209 flow [2023-11-17 16:12:27,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 168 transitions, 2075 flow, removed 32 selfloop flow, removed 4 redundant places. [2023-11-17 16:12:27,009 INFO L231 Difference]: Finished difference. Result has 97 places, 155 transitions, 1754 flow [2023-11-17 16:12:27,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=1680, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1754, PETRI_PLACES=97, PETRI_TRANSITIONS=155} [2023-11-17 16:12:27,009 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 59 predicate places. [2023-11-17 16:12:27,009 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 155 transitions, 1754 flow [2023-11-17 16:12:27,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:27,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:27,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:27,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-17 16:12:27,010 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:12:27,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:27,010 INFO L85 PathProgramCache]: Analyzing trace with hash 413494515, now seen corresponding path program 4 times [2023-11-17 16:12:27,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:27,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308889839] [2023-11-17 16:12:27,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:27,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:27,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:12:27,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:27,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308889839] [2023-11-17 16:12:27,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308889839] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:12:27,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:12:27,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:12:27,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163553969] [2023-11-17 16:12:27,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:12:27,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:12:27,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:27,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:12:27,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:12:27,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 219 [2023-11-17 16:12:27,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 155 transitions, 1754 flow. Second operand has 5 states, 5 states have (on average 98.6) internal successors, (493), 5 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:27,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:27,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 219 [2023-11-17 16:12:27,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:27,914 INFO L124 PetriNetUnfolderBase]: 7787/10316 cut-off events. [2023-11-17 16:12:27,915 INFO L125 PetriNetUnfolderBase]: For 48103/48103 co-relation queries the response was YES. [2023-11-17 16:12:27,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48592 conditions, 10316 events. 7787/10316 cut-off events. For 48103/48103 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 44853 event pairs, 1832 based on Foata normal form. 54/10370 useless extension candidates. Maximal degree in co-relation 43529. Up to 7410 conditions per place. [2023-11-17 16:12:27,993 INFO L140 encePairwiseOnDemand]: 214/219 looper letters, 220 selfloop transitions, 34 changer transitions 8/262 dead transitions. [2023-11-17 16:12:27,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 262 transitions, 3375 flow [2023-11-17 16:12:27,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:12:27,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:12:27,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 526 transitions. [2023-11-17 16:12:27,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.480365296803653 [2023-11-17 16:12:27,995 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 526 transitions. [2023-11-17 16:12:27,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 526 transitions. [2023-11-17 16:12:27,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:27,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 526 transitions. [2023-11-17 16:12:27,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 105.2) internal successors, (526), 5 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:27,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:27,997 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:27,997 INFO L175 Difference]: Start difference. First operand has 97 places, 155 transitions, 1754 flow. Second operand 5 states and 526 transitions. [2023-11-17 16:12:27,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 262 transitions, 3375 flow [2023-11-17 16:12:28,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 262 transitions, 3265 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 16:12:28,183 INFO L231 Difference]: Finished difference. Result has 102 places, 180 transitions, 2244 flow [2023-11-17 16:12:28,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=1680, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2244, PETRI_PLACES=102, PETRI_TRANSITIONS=180} [2023-11-17 16:12:28,183 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 64 predicate places. [2023-11-17 16:12:28,183 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 180 transitions, 2244 flow [2023-11-17 16:12:28,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.6) internal successors, (493), 5 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:28,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:28,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:28,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-17 16:12:28,184 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:12:28,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:28,184 INFO L85 PathProgramCache]: Analyzing trace with hash 432715497, now seen corresponding path program 5 times [2023-11-17 16:12:28,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:28,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527799191] [2023-11-17 16:12:28,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:28,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:28,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:28,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:12:28,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:28,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527799191] [2023-11-17 16:12:28,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527799191] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:12:28,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538888952] [2023-11-17 16:12:28,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:12:28,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:12:28,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:12:28,237 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 16:12:28,238 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 16:12:28,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:12:28,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:12:28,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 16:12:28,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:12:28,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:12:28,356 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:12:28,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538888952] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:12:28,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:12:28,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-17 16:12:28,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967269858] [2023-11-17 16:12:28,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:12:28,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:12:28,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:28,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:12:28,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-17 16:12:28,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 219 [2023-11-17 16:12:28,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 180 transitions, 2244 flow. Second operand has 5 states, 5 states have (on average 98.6) internal successors, (493), 5 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:28,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:28,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 219 [2023-11-17 16:12:28,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:29,255 INFO L124 PetriNetUnfolderBase]: 9054/11959 cut-off events. [2023-11-17 16:12:29,255 INFO L125 PetriNetUnfolderBase]: For 62723/62723 co-relation queries the response was YES. [2023-11-17 16:12:29,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60310 conditions, 11959 events. 9054/11959 cut-off events. For 62723/62723 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 54150 event pairs, 1040 based on Foata normal form. 126/12085 useless extension candidates. Maximal degree in co-relation 53453. Up to 6971 conditions per place. [2023-11-17 16:12:29,655 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 319 selfloop transitions, 17 changer transitions 12/348 dead transitions. [2023-11-17 16:12:29,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 348 transitions, 4711 flow [2023-11-17 16:12:29,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:12:29,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:12:29,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 533 transitions. [2023-11-17 16:12:29,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4867579908675799 [2023-11-17 16:12:29,673 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 533 transitions. [2023-11-17 16:12:29,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 533 transitions. [2023-11-17 16:12:29,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:29,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 533 transitions. [2023-11-17 16:12:29,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 106.6) internal successors, (533), 5 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:29,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:29,675 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:29,675 INFO L175 Difference]: Start difference. First operand has 102 places, 180 transitions, 2244 flow. Second operand 5 states and 533 transitions. [2023-11-17 16:12:29,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 348 transitions, 4711 flow [2023-11-17 16:12:29,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 348 transitions, 4587 flow, removed 36 selfloop flow, removed 3 redundant places. [2023-11-17 16:12:29,872 INFO L231 Difference]: Finished difference. Result has 105 places, 192 transitions, 2353 flow [2023-11-17 16:12:29,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=2170, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2353, PETRI_PLACES=105, PETRI_TRANSITIONS=192} [2023-11-17 16:12:29,873 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 67 predicate places. [2023-11-17 16:12:29,873 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 192 transitions, 2353 flow [2023-11-17 16:12:29,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.6) internal successors, (493), 5 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:29,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:29,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:29,878 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 16:12:30,076 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,SelfDestructingSolverStorable25 [2023-11-17 16:12:30,078 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:12:30,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:30,078 INFO L85 PathProgramCache]: Analyzing trace with hash 846455589, now seen corresponding path program 6 times [2023-11-17 16:12:30,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:30,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657369336] [2023-11-17 16:12:30,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:30,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:30,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:30,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:12:30,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:30,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657369336] [2023-11-17 16:12:30,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657369336] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:12:30,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023386759] [2023-11-17 16:12:30,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:12:30,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:12:30,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:12:30,153 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 16:12:30,192 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 16:12:30,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 16:12:30,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:12:30,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 16:12:30,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:12:30,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:12:30,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:12:30,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:12:30,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023386759] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:12:30,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:12:30,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-17 16:12:30,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710575216] [2023-11-17 16:12:30,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:12:30,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:12:30,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:30,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:12:30,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-17 16:12:30,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 219 [2023-11-17 16:12:30,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 192 transitions, 2353 flow. Second operand has 10 states, 10 states have (on average 93.6) internal successors, (936), 10 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:30,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:30,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 219 [2023-11-17 16:12:30,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:31,860 INFO L124 PetriNetUnfolderBase]: 10516/13953 cut-off events. [2023-11-17 16:12:31,860 INFO L125 PetriNetUnfolderBase]: For 83153/83153 co-relation queries the response was YES. [2023-11-17 16:12:31,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72564 conditions, 13953 events. 10516/13953 cut-off events. For 83153/83153 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 64665 event pairs, 481 based on Foata normal form. 346/14299 useless extension candidates. Maximal degree in co-relation 63048. Up to 7353 conditions per place. [2023-11-17 16:12:31,967 INFO L140 encePairwiseOnDemand]: 211/219 looper letters, 486 selfloop transitions, 194 changer transitions 0/680 dead transitions. [2023-11-17 16:12:31,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 680 transitions, 8353 flow [2023-11-17 16:12:31,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 16:12:31,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 16:12:31,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1538 transitions. [2023-11-17 16:12:31,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681887366818874 [2023-11-17 16:12:31,969 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1538 transitions. [2023-11-17 16:12:31,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1538 transitions. [2023-11-17 16:12:31,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:31,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1538 transitions. [2023-11-17 16:12:31,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 102.53333333333333) internal successors, (1538), 15 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:31,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 219.0) internal successors, (3504), 16 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:31,986 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 219.0) internal successors, (3504), 16 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:31,986 INFO L175 Difference]: Start difference. First operand has 105 places, 192 transitions, 2353 flow. Second operand 15 states and 1538 transitions. [2023-11-17 16:12:31,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 680 transitions, 8353 flow [2023-11-17 16:12:32,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 680 transitions, 8311 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 16:12:32,322 INFO L231 Difference]: Finished difference. Result has 123 places, 359 transitions, 4528 flow [2023-11-17 16:12:32,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=2346, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4528, PETRI_PLACES=123, PETRI_TRANSITIONS=359} [2023-11-17 16:12:32,323 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 85 predicate places. [2023-11-17 16:12:32,323 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 359 transitions, 4528 flow [2023-11-17 16:12:32,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 93.6) internal successors, (936), 10 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:32,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:32,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:32,332 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 16:12:32,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-17 16:12:32,527 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:12:32,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:32,528 INFO L85 PathProgramCache]: Analyzing trace with hash -947563557, now seen corresponding path program 7 times [2023-11-17 16:12:32,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:32,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623775826] [2023-11-17 16:12:32,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:32,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:32,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:32,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:12:32,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:32,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623775826] [2023-11-17 16:12:32,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623775826] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:12:32,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:12:32,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:12:32,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027896907] [2023-11-17 16:12:32,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:12:32,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:12:32,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:32,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:12:32,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:12:32,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 219 [2023-11-17 16:12:32,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 359 transitions, 4528 flow. Second operand has 5 states, 5 states have (on average 98.6) internal successors, (493), 5 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:32,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:32,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 219 [2023-11-17 16:12:32,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:34,021 INFO L124 PetriNetUnfolderBase]: 12054/15943 cut-off events. [2023-11-17 16:12:34,022 INFO L125 PetriNetUnfolderBase]: For 129224/129224 co-relation queries the response was YES. [2023-11-17 16:12:34,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93897 conditions, 15943 events. 12054/15943 cut-off events. For 129224/129224 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 74610 event pairs, 2615 based on Foata normal form. 250/16193 useless extension candidates. Maximal degree in co-relation 82556. Up to 12973 conditions per place. [2023-11-17 16:12:34,180 INFO L140 encePairwiseOnDemand]: 214/219 looper letters, 416 selfloop transitions, 92 changer transitions 0/508 dead transitions. [2023-11-17 16:12:34,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 508 transitions, 7171 flow [2023-11-17 16:12:34,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:12:34,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:12:34,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 533 transitions. [2023-11-17 16:12:34,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4867579908675799 [2023-11-17 16:12:34,181 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 533 transitions. [2023-11-17 16:12:34,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 533 transitions. [2023-11-17 16:12:34,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:34,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 533 transitions. [2023-11-17 16:12:34,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 106.6) internal successors, (533), 5 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:34,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:34,183 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:34,183 INFO L175 Difference]: Start difference. First operand has 123 places, 359 transitions, 4528 flow. Second operand 5 states and 533 transitions. [2023-11-17 16:12:34,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 508 transitions, 7171 flow [2023-11-17 16:12:35,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 508 transitions, 7071 flow, removed 50 selfloop flow, removed 0 redundant places. [2023-11-17 16:12:35,230 INFO L231 Difference]: Finished difference. Result has 128 places, 373 transitions, 4919 flow [2023-11-17 16:12:35,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=4456, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4919, PETRI_PLACES=128, PETRI_TRANSITIONS=373} [2023-11-17 16:12:35,231 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 90 predicate places. [2023-11-17 16:12:35,231 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 373 transitions, 4919 flow [2023-11-17 16:12:35,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.6) internal successors, (493), 5 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:35,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:35,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:35,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-11-17 16:12:35,231 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:12:35,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:35,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1686181465, now seen corresponding path program 8 times [2023-11-17 16:12:35,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:35,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112206181] [2023-11-17 16:12:35,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:35,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:35,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:12:35,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:35,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112206181] [2023-11-17 16:12:35,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112206181] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:12:35,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:12:35,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:12:35,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055086950] [2023-11-17 16:12:35,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:12:35,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:12:35,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:35,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:12:35,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:12:35,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 219 [2023-11-17 16:12:35,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 373 transitions, 4919 flow. Second operand has 5 states, 5 states have (on average 98.6) internal successors, (493), 5 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:35,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:35,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 219 [2023-11-17 16:12:35,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:37,073 INFO L124 PetriNetUnfolderBase]: 10950/14443 cut-off events. [2023-11-17 16:12:37,073 INFO L125 PetriNetUnfolderBase]: For 119900/119900 co-relation queries the response was YES. [2023-11-17 16:12:37,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85473 conditions, 14443 events. 10950/14443 cut-off events. For 119900/119900 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 65477 event pairs, 1764 based on Foata normal form. 250/14693 useless extension candidates. Maximal degree in co-relation 75270. Up to 7997 conditions per place. [2023-11-17 16:12:37,149 INFO L140 encePairwiseOnDemand]: 214/219 looper letters, 421 selfloop transitions, 122 changer transitions 6/549 dead transitions. [2023-11-17 16:12:37,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 549 transitions, 7950 flow [2023-11-17 16:12:37,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:12:37,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:12:37,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 536 transitions. [2023-11-17 16:12:37,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4894977168949772 [2023-11-17 16:12:37,150 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 536 transitions. [2023-11-17 16:12:37,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 536 transitions. [2023-11-17 16:12:37,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:37,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 536 transitions. [2023-11-17 16:12:37,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 107.2) internal successors, (536), 5 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:37,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:37,161 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:37,161 INFO L175 Difference]: Start difference. First operand has 128 places, 373 transitions, 4919 flow. Second operand 5 states and 536 transitions. [2023-11-17 16:12:37,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 549 transitions, 7950 flow [2023-11-17 16:12:37,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 549 transitions, 7700 flow, removed 49 selfloop flow, removed 3 redundant places. [2023-11-17 16:12:37,845 INFO L231 Difference]: Finished difference. Result has 129 places, 372 transitions, 4907 flow [2023-11-17 16:12:37,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=4675, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4907, PETRI_PLACES=129, PETRI_TRANSITIONS=372} [2023-11-17 16:12:37,846 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 91 predicate places. [2023-11-17 16:12:37,846 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 372 transitions, 4907 flow [2023-11-17 16:12:37,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.6) internal successors, (493), 5 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:37,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:37,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:37,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-11-17 16:12:37,846 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:12:37,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:37,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1036040589, now seen corresponding path program 1 times [2023-11-17 16:12:37,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:37,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767255996] [2023-11-17 16:12:37,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:37,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:37,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:37,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:12:37,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:37,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767255996] [2023-11-17 16:12:37,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767255996] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:12:37,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:12:37,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 16:12:37,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431381534] [2023-11-17 16:12:37,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:12:37,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:12:37,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:37,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:12:37,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:12:37,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 219 [2023-11-17 16:12:37,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 372 transitions, 4907 flow. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:37,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:37,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 219 [2023-11-17 16:12:37,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:38,885 INFO L124 PetriNetUnfolderBase]: 8048/10937 cut-off events. [2023-11-17 16:12:38,885 INFO L125 PetriNetUnfolderBase]: For 91060/91060 co-relation queries the response was YES. [2023-11-17 16:12:39,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62131 conditions, 10937 events. 8048/10937 cut-off events. For 91060/91060 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 51689 event pairs, 1460 based on Foata normal form. 990/11927 useless extension candidates. Maximal degree in co-relation 62092. Up to 6887 conditions per place. [2023-11-17 16:12:39,051 INFO L140 encePairwiseOnDemand]: 216/219 looper letters, 311 selfloop transitions, 50 changer transitions 0/361 dead transitions. [2023-11-17 16:12:39,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 361 transitions, 5347 flow [2023-11-17 16:12:39,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:12:39,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:12:39,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2023-11-17 16:12:39,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5662100456621004 [2023-11-17 16:12:39,052 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions. [2023-11-17 16:12:39,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions. [2023-11-17 16:12:39,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:39,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions. [2023-11-17 16:12:39,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.0) internal successors, (372), 3 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 16:12:39,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:39,054 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:39,054 INFO L175 Difference]: Start difference. First operand has 129 places, 372 transitions, 4907 flow. Second operand 3 states and 372 transitions. [2023-11-17 16:12:39,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 361 transitions, 5347 flow [2023-11-17 16:12:39,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 361 transitions, 5107 flow, removed 30 selfloop flow, removed 4 redundant places. [2023-11-17 16:12:39,414 INFO L231 Difference]: Finished difference. Result has 125 places, 330 transitions, 4253 flow [2023-11-17 16:12:39,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=4087, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4253, PETRI_PLACES=125, PETRI_TRANSITIONS=330} [2023-11-17 16:12:39,415 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 87 predicate places. [2023-11-17 16:12:39,415 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 330 transitions, 4253 flow [2023-11-17 16:12:39,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:39,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:39,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:39,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-11-17 16:12:39,415 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:12:39,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:39,415 INFO L85 PathProgramCache]: Analyzing trace with hash -381891763, now seen corresponding path program 2 times [2023-11-17 16:12:39,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:39,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723006478] [2023-11-17 16:12:39,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:39,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:39,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:39,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:12:39,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:39,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723006478] [2023-11-17 16:12:39,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723006478] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:12:39,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514628211] [2023-11-17 16:12:39,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:12:39,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:12:39,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:12:39,561 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 16:12:39,575 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 16:12:39,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:12:39,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:12:39,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 16:12:39,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:12:39,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:12:39,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:12:39,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:12:39,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514628211] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:12:39,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:12:39,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2023-11-17 16:12:39,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112058246] [2023-11-17 16:12:39,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:12:39,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 16:12:39,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:39,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 16:12:39,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-17 16:12:39,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 219 [2023-11-17 16:12:39,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 330 transitions, 4253 flow. Second operand has 9 states, 9 states have (on average 114.88888888888889) internal successors, (1034), 9 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:39,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:39,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 219 [2023-11-17 16:12:39,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:43,119 INFO L124 PetriNetUnfolderBase]: 24312/32827 cut-off events. [2023-11-17 16:12:43,120 INFO L125 PetriNetUnfolderBase]: For 202259/202259 co-relation queries the response was YES. [2023-11-17 16:12:43,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178618 conditions, 32827 events. 24312/32827 cut-off events. For 202259/202259 co-relation queries the response was YES. Maximal size of possible extension queue 1288. Compared 180086 event pairs, 1976 based on Foata normal form. 540/33367 useless extension candidates. Maximal degree in co-relation 178579. Up to 16689 conditions per place. [2023-11-17 16:12:43,411 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 568 selfloop transitions, 318 changer transitions 4/890 dead transitions. [2023-11-17 16:12:43,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 890 transitions, 12255 flow [2023-11-17 16:12:43,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:12:43,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:12:43,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1031 transitions. [2023-11-17 16:12:43,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884703196347032 [2023-11-17 16:12:43,412 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1031 transitions. [2023-11-17 16:12:43,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1031 transitions. [2023-11-17 16:12:43,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:43,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1031 transitions. [2023-11-17 16:12:43,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 128.875) internal successors, (1031), 8 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:43,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 219.0) internal successors, (1971), 9 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 16:12:43,415 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 219.0) internal successors, (1971), 9 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 16:12:43,415 INFO L175 Difference]: Start difference. First operand has 125 places, 330 transitions, 4253 flow. Second operand 8 states and 1031 transitions. [2023-11-17 16:12:43,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 890 transitions, 12255 flow [2023-11-17 16:12:45,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 890 transitions, 12015 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 16:12:45,716 INFO L231 Difference]: Finished difference. Result has 134 places, 611 transitions, 8923 flow [2023-11-17 16:12:45,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=4153, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8923, PETRI_PLACES=134, PETRI_TRANSITIONS=611} [2023-11-17 16:12:45,717 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 96 predicate places. [2023-11-17 16:12:45,717 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 611 transitions, 8923 flow [2023-11-17 16:12:45,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 114.88888888888889) internal successors, (1034), 9 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:45,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:12:45,733 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:12:45,752 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 16:12:45,933 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,SelfDestructingSolverStorable30 [2023-11-17 16:12:45,934 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:12:45,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:12:45,934 INFO L85 PathProgramCache]: Analyzing trace with hash 881170412, now seen corresponding path program 3 times [2023-11-17 16:12:45,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:12:45,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714311084] [2023-11-17 16:12:45,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:12:45,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:12:45,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:12:46,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:12:46,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:12:46,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714311084] [2023-11-17 16:12:46,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714311084] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:12:46,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175005585] [2023-11-17 16:12:46,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:12:46,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:12:46,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:12:46,001 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 16:12:46,006 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 16:12:46,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:12:46,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:12:46,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:12:46,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:12:46,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:12:46,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:12:46,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:12:46,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175005585] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:12:46,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:12:46,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-17 16:12:46,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681267593] [2023-11-17 16:12:46,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:12:46,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 16:12:46,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:12:46,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 16:12:46,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-17 16:12:46,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 219 [2023-11-17 16:12:46,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 611 transitions, 8923 flow. Second operand has 12 states, 12 states have (on average 93.58333333333333) internal successors, (1123), 12 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:46,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:12:46,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 219 [2023-11-17 16:12:46,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:12:53,630 INFO L124 PetriNetUnfolderBase]: 43784/58761 cut-off events. [2023-11-17 16:12:53,630 INFO L125 PetriNetUnfolderBase]: For 440336/440336 co-relation queries the response was YES. [2023-11-17 16:12:53,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350464 conditions, 58761 events. 43784/58761 cut-off events. For 440336/440336 co-relation queries the response was YES. Maximal size of possible extension queue 2168. Compared 341322 event pairs, 2945 based on Foata normal form. 1382/60143 useless extension candidates. Maximal degree in co-relation 350421. Up to 30637 conditions per place. [2023-11-17 16:12:54,337 INFO L140 encePairwiseOnDemand]: 210/219 looper letters, 1326 selfloop transitions, 513 changer transitions 0/1839 dead transitions. [2023-11-17 16:12:54,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 1839 transitions, 27144 flow [2023-11-17 16:12:54,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 16:12:54,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 16:12:54,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2234 transitions. [2023-11-17 16:12:54,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46367787463677873 [2023-11-17 16:12:54,340 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2234 transitions. [2023-11-17 16:12:54,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2234 transitions. [2023-11-17 16:12:54,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:12:54,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2234 transitions. [2023-11-17 16:12:54,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 101.54545454545455) internal successors, (2234), 22 states have internal predecessors, (2234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:54,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 219.0) internal successors, (5037), 23 states have internal predecessors, (5037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:54,345 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 219.0) internal successors, (5037), 23 states have internal predecessors, (5037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:12:54,345 INFO L175 Difference]: Start difference. First operand has 134 places, 611 transitions, 8923 flow. Second operand 22 states and 2234 transitions. [2023-11-17 16:12:54,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 1839 transitions, 27144 flow [2023-11-17 16:13:01,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 1839 transitions, 24596 flow, removed 1274 selfloop flow, removed 0 redundant places. [2023-11-17 16:13:01,375 INFO L231 Difference]: Finished difference. Result has 174 places, 974 transitions, 15066 flow [2023-11-17 16:13:01,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=8257, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=15066, PETRI_PLACES=174, PETRI_TRANSITIONS=974} [2023-11-17 16:13:01,376 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 136 predicate places. [2023-11-17 16:13:01,377 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 974 transitions, 15066 flow [2023-11-17 16:13:01,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 93.58333333333333) internal successors, (1123), 12 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:01,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:01,377 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:01,381 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 16:13:01,581 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,SelfDestructingSolverStorable31 [2023-11-17 16:13:01,581 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:13:01,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:01,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1190974103, now seen corresponding path program 4 times [2023-11-17 16:13:01,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:01,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925693006] [2023-11-17 16:13:01,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:01,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:01,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:01,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:13:01,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:01,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925693006] [2023-11-17 16:13:01,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925693006] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:13:01,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012289819] [2023-11-17 16:13:01,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:13:01,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:01,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:13:01,648 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 16:13:01,654 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 16:13:01,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:13:01,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:13:01,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:13:01,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:13:01,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:13:01,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:13:01,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:13:01,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012289819] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:13:01,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:13:01,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-17 16:13:01,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075790138] [2023-11-17 16:13:01,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:13:01,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 16:13:01,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:01,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 16:13:01,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-17 16:13:01,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 219 [2023-11-17 16:13:01,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 974 transitions, 15066 flow. Second operand has 13 states, 13 states have (on average 96.23076923076923) internal successors, (1251), 13 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:01,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:01,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 219 [2023-11-17 16:13:01,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:17,040 INFO L124 PetriNetUnfolderBase]: 68143/89928 cut-off events. [2023-11-17 16:13:17,041 INFO L125 PetriNetUnfolderBase]: For 973100/973100 co-relation queries the response was YES. [2023-11-17 16:13:17,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 581029 conditions, 89928 events. 68143/89928 cut-off events. For 973100/973100 co-relation queries the response was YES. Maximal size of possible extension queue 3203. Compared 525244 event pairs, 7030 based on Foata normal form. 616/90544 useless extension candidates. Maximal degree in co-relation 580966. Up to 31314 conditions per place. [2023-11-17 16:13:18,168 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 1799 selfloop transitions, 526 changer transitions 18/2343 dead transitions. [2023-11-17 16:13:18,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 2343 transitions, 39544 flow [2023-11-17 16:13:18,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 16:13:18,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 16:13:18,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1175 transitions. [2023-11-17 16:13:18,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48775425487754254 [2023-11-17 16:13:18,170 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1175 transitions. [2023-11-17 16:13:18,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1175 transitions. [2023-11-17 16:13:18,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:18,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1175 transitions. [2023-11-17 16:13:18,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 106.81818181818181) internal successors, (1175), 11 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:18,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 219.0) internal successors, (2628), 12 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:18,173 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 219.0) internal successors, (2628), 12 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:18,173 INFO L175 Difference]: Start difference. First operand has 174 places, 974 transitions, 15066 flow. Second operand 11 states and 1175 transitions. [2023-11-17 16:13:18,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 2343 transitions, 39544 flow [2023-11-17 16:13:44,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 2343 transitions, 38550 flow, removed 427 selfloop flow, removed 1 redundant places. [2023-11-17 16:13:44,145 INFO L231 Difference]: Finished difference. Result has 190 places, 1300 transitions, 21319 flow [2023-11-17 16:13:44,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=14626, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=974, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=21319, PETRI_PLACES=190, PETRI_TRANSITIONS=1300} [2023-11-17 16:13:44,146 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 152 predicate places. [2023-11-17 16:13:44,146 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 1300 transitions, 21319 flow [2023-11-17 16:13:44,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 96.23076923076923) internal successors, (1251), 13 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:44,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:44,146 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:44,150 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 16:13:44,351 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,SelfDestructingSolverStorable32 [2023-11-17 16:13:44,353 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:13:44,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:44,354 INFO L85 PathProgramCache]: Analyzing trace with hash -257686879, now seen corresponding path program 5 times [2023-11-17 16:13:44,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:44,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557214695] [2023-11-17 16:13:44,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:44,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:44,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:44,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:13:44,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:44,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557214695] [2023-11-17 16:13:44,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557214695] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:13:44,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475636101] [2023-11-17 16:13:44,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:13:44,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:44,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:13:44,426 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 16:13:44,457 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 16:13:44,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:13:44,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:13:44,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:13:44,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:13:44,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:13:44,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:13:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:13:44,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475636101] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:13:44,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:13:44,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-17 16:13:44,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991372201] [2023-11-17 16:13:44,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:13:44,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 16:13:44,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:44,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 16:13:44,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-17 16:13:44,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 219 [2023-11-17 16:13:44,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 1300 transitions, 21319 flow. Second operand has 11 states, 11 states have (on average 96.72727272727273) internal successors, (1064), 11 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:44,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:44,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 219 [2023-11-17 16:13:44,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:04,529 INFO L124 PetriNetUnfolderBase]: 72391/96526 cut-off events. [2023-11-17 16:14:04,529 INFO L125 PetriNetUnfolderBase]: For 1261335/1261335 co-relation queries the response was YES. [2023-11-17 16:14:05,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684709 conditions, 96526 events. 72391/96526 cut-off events. For 1261335/1261335 co-relation queries the response was YES. Maximal size of possible extension queue 3419. Compared 581590 event pairs, 9524 based on Foata normal form. 304/96830 useless extension candidates. Maximal degree in co-relation 684638. Up to 30913 conditions per place. [2023-11-17 16:14:05,963 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 1633 selfloop transitions, 357 changer transitions 12/2002 dead transitions. [2023-11-17 16:14:05,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 2002 transitions, 35740 flow [2023-11-17 16:14:05,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:14:05,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:14:05,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 760 transitions. [2023-11-17 16:14:05,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4957599478147423 [2023-11-17 16:14:05,965 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 760 transitions. [2023-11-17 16:14:05,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 760 transitions. [2023-11-17 16:14:05,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:05,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 760 transitions. [2023-11-17 16:14:05,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 108.57142857142857) internal successors, (760), 7 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:05,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:05,968 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:05,968 INFO L175 Difference]: Start difference. First operand has 190 places, 1300 transitions, 21319 flow. Second operand 7 states and 760 transitions. [2023-11-17 16:14:05,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 2002 transitions, 35740 flow