/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 --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 12:15:46,457 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 12:15:46,520 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 12:15:46,544 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 12:15:46,545 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 12:15:46,545 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 12:15:46,546 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 12:15:46,546 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 12:15:46,546 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 12:15:46,553 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 12:15:46,553 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 12:15:46,553 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 12:15:46,553 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 12:15:46,553 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 12:15:46,553 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 12:15:46,554 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 12:15:46,554 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 12:15:46,554 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 12:15:46,554 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 12:15:46,554 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 12:15:46,554 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 12:15:46,561 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 12:15:46,561 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 12:15:46,561 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 12:15:46,561 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 12:15:46,561 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:15:46,562 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 12:15:46,562 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 12:15:46,562 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 12:15:46,562 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 12:15:46,563 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 12:15:46,563 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 12:15:46,563 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 12:15:46,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 12:15:46,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 12:15:46,730 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 12:15:46,731 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 12:15:46,731 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 12:15:46,732 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2023-11-17 12:15:47,634 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 12:15:47,788 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 12:15:47,788 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2023-11-17 12:15:47,794 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99a1697c2/94340231585949f9b28d245643ed1e4e/FLAGf662dba10 [2023-11-17 12:15:47,807 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99a1697c2/94340231585949f9b28d245643ed1e4e [2023-11-17 12:15:47,809 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 12:15:47,810 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 12:15:47,812 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 12:15:47,812 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 12:15:47,815 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 12:15:47,815 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:15:47" (1/1) ... [2023-11-17 12:15:47,816 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26393118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:15:47, skipping insertion in model container [2023-11-17 12:15:47,816 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:15:47" (1/1) ... [2023-11-17 12:15:47,832 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 12:15:47,947 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c[2147,2160] [2023-11-17 12:15:47,949 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:15:47,955 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 12:15:47,969 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c[2147,2160] [2023-11-17 12:15:47,969 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:15:47,974 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:15:47,974 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:15:47,979 INFO L206 MainTranslator]: Completed translation [2023-11-17 12:15:47,979 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:15:47 WrapperNode [2023-11-17 12:15:47,979 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 12:15:47,980 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 12:15:47,980 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 12:15:47,980 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 12:15:47,984 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:15:47" (1/1) ... [2023-11-17 12:15:47,989 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:15:47" (1/1) ... [2023-11-17 12:15:48,000 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2023-11-17 12:15:48,001 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 12:15:48,001 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 12:15:48,001 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 12:15:48,001 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 12:15:48,006 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:15:47" (1/1) ... [2023-11-17 12:15:48,006 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:15:47" (1/1) ... [2023-11-17 12:15:48,008 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:15:47" (1/1) ... [2023-11-17 12:15:48,008 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:15:47" (1/1) ... [2023-11-17 12:15:48,010 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:15:47" (1/1) ... [2023-11-17 12:15:48,012 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:15:47" (1/1) ... [2023-11-17 12:15:48,013 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:15:47" (1/1) ... [2023-11-17 12:15:48,014 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:15:47" (1/1) ... [2023-11-17 12:15:48,015 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 12:15:48,015 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 12:15:48,016 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 12:15:48,016 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 12:15:48,016 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:15:47" (1/1) ... [2023-11-17 12:15:48,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:15:48,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:48,036 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 12:15:48,038 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 12:15:48,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 12:15:48,056 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 12:15:48,056 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 12:15:48,056 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 12:15:48,056 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 12:15:48,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 12:15:48,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 12:15:48,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 12:15:48,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 12:15:48,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 12:15:48,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 12:15:48,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 12:15:48,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 12:15:48,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 12:15:48,058 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 12:15:48,115 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 12:15:48,117 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 12:15:48,243 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 12:15:48,339 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 12:15:48,339 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 12:15:48,341 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:15:48 BoogieIcfgContainer [2023-11-17 12:15:48,341 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 12:15:48,342 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 12:15:48,342 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 12:15:48,346 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 12:15:48,346 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 12:15:47" (1/3) ... [2023-11-17 12:15:48,349 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e90afc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:15:48, skipping insertion in model container [2023-11-17 12:15:48,349 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:15:47" (2/3) ... [2023-11-17 12:15:48,349 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e90afc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:15:48, skipping insertion in model container [2023-11-17 12:15:48,349 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:15:48" (3/3) ... [2023-11-17 12:15:48,351 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2023-11-17 12:15:48,362 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 12:15:48,362 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 12:15:48,362 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 12:15:48,406 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 12:15:48,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 23 transitions, 60 flow [2023-11-17 12:15:48,457 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2023-11-17 12:15:48,457 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:15:48,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 21 events. 2/21 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 21 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2023-11-17 12:15:48,462 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 23 transitions, 60 flow [2023-11-17 12:15:48,464 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 20 transitions, 52 flow [2023-11-17 12:15:48,466 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 12:15:48,474 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 25 places, 20 transitions, 52 flow [2023-11-17 12:15:48,476 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 25 places, 20 transitions, 52 flow [2023-11-17 12:15:48,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 20 transitions, 52 flow [2023-11-17 12:15:48,486 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2023-11-17 12:15:48,486 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:15:48,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 2/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2023-11-17 12:15:48,487 INFO L119 LiptonReduction]: Number of co-enabled transitions 110 [2023-11-17 12:15:48,691 INFO L134 LiptonReduction]: Checked pairs total: 135 [2023-11-17 12:15:48,692 INFO L136 LiptonReduction]: Total number of compositions: 5 [2023-11-17 12:15:48,707 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 12:15:48,712 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;@506755c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 12:15:48,712 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 12:15:48,723 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 12:15:48,723 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-17 12:15:48,723 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:15:48,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:48,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:48,724 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:48,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:48,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1299882824, now seen corresponding path program 1 times [2023-11-17 12:15:48,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:48,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046472898] [2023-11-17 12:15:48,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:48,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:48,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:49,006 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 12:15:49,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:49,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046472898] [2023-11-17 12:15:49,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046472898] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:15:49,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:15:49,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 12:15:49,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478448238] [2023-11-17 12:15:49,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:15:49,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:15:49,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:49,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:15:49,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:15:49,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2023-11-17 12:15:49,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:49,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:49,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2023-11-17 12:15:49,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:49,100 INFO L124 PetriNetUnfolderBase]: 60/116 cut-off events. [2023-11-17 12:15:49,100 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-17 12:15:49,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 116 events. 60/116 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 304 event pairs, 24 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 188. Up to 61 conditions per place. [2023-11-17 12:15:49,104 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 19 selfloop transitions, 2 changer transitions 4/25 dead transitions. [2023-11-17 12:15:49,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 25 transitions, 121 flow [2023-11-17 12:15:49,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:15:49,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:15:49,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2023-11-17 12:15:49,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-17 12:15:49,113 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 42 transitions. [2023-11-17 12:15:49,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 42 transitions. [2023-11-17 12:15:49,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:49,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 42 transitions. [2023-11-17 12:15:49,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:49,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:49,120 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:49,121 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 42 transitions. [2023-11-17 12:15:49,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 25 transitions, 121 flow [2023-11-17 12:15:49,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 25 transitions, 107 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 12:15:49,126 INFO L231 Difference]: Finished difference. Result has 19 places, 16 transitions, 48 flow [2023-11-17 12:15:49,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=16} [2023-11-17 12:15:49,130 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-11-17 12:15:49,130 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 16 transitions, 48 flow [2023-11-17 12:15:49,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:49,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:49,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:49,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 12:15:49,131 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:49,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:49,132 INFO L85 PathProgramCache]: Analyzing trace with hash 170095659, now seen corresponding path program 1 times [2023-11-17 12:15:49,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:49,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942424461] [2023-11-17 12:15:49,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:49,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:49,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:49,315 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 12:15:49,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:49,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942424461] [2023-11-17 12:15:49,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942424461] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:15:49,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:15:49,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:15:49,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538723014] [2023-11-17 12:15:49,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:15:49,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:15:49,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:49,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:15:49,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:15:49,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:15:49,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 16 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:49,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:49,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:15:49,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:49,396 INFO L124 PetriNetUnfolderBase]: 66/126 cut-off events. [2023-11-17 12:15:49,396 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-17 12:15:49,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 126 events. 66/126 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 343 event pairs, 37 based on Foata normal form. 2/128 useless extension candidates. Maximal degree in co-relation 130. Up to 106 conditions per place. [2023-11-17 12:15:49,398 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 19 selfloop transitions, 4 changer transitions 5/28 dead transitions. [2023-11-17 12:15:49,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 132 flow [2023-11-17 12:15:49,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:15:49,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:15:49,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 49 transitions. [2023-11-17 12:15:49,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35 [2023-11-17 12:15:49,400 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 49 transitions. [2023-11-17 12:15:49,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 49 transitions. [2023-11-17 12:15:49,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:49,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 49 transitions. [2023-11-17 12:15:49,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:49,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:49,402 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:49,402 INFO L175 Difference]: Start difference. First operand has 19 places, 16 transitions, 48 flow. Second operand 5 states and 49 transitions. [2023-11-17 12:15:49,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 132 flow [2023-11-17 12:15:49,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 28 transitions, 129 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 12:15:49,403 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 75 flow [2023-11-17 12:15:49,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=75, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2023-11-17 12:15:49,404 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-11-17 12:15:49,404 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 75 flow [2023-11-17 12:15:49,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:49,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:49,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:49,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 12:15:49,405 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:49,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:49,410 INFO L85 PathProgramCache]: Analyzing trace with hash 2013602061, now seen corresponding path program 2 times [2023-11-17 12:15:49,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:49,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275588049] [2023-11-17 12:15:49,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:49,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:49,536 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 12:15:49,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:49,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275588049] [2023-11-17 12:15:49,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275588049] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:49,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028511499] [2023-11-17 12:15:49,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:15:49,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:49,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:49,542 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 12:15:49,549 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 12:15:49,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:15:49,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:49,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:15:49,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:49,683 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 12:15:49,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:49,730 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 12:15:49,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028511499] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:49,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 12:15:49,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-11-17 12:15:49,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33488168] [2023-11-17 12:15:49,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:15:49,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:15:49,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:49,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:15:49,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-17 12:15:49,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:15:49,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:49,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:49,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:15:49,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:49,796 INFO L124 PetriNetUnfolderBase]: 56/105 cut-off events. [2023-11-17 12:15:49,796 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2023-11-17 12:15:49,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 105 events. 56/105 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 264 event pairs, 10 based on Foata normal form. 6/111 useless extension candidates. Maximal degree in co-relation 197. Up to 62 conditions per place. [2023-11-17 12:15:49,798 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 25 selfloop transitions, 4 changer transitions 0/29 dead transitions. [2023-11-17 12:15:49,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 29 transitions, 171 flow [2023-11-17 12:15:49,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 12:15:49,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 12:15:49,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2023-11-17 12:15:49,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2023-11-17 12:15:49,800 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 44 transitions. [2023-11-17 12:15:49,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 44 transitions. [2023-11-17 12:15:49,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:49,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 44 transitions. [2023-11-17 12:15:49,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:49,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:49,803 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:49,803 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 75 flow. Second operand 4 states and 44 transitions. [2023-11-17 12:15:49,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 29 transitions, 171 flow [2023-11-17 12:15:49,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 29 transitions, 155 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-17 12:15:49,806 INFO L231 Difference]: Finished difference. Result has 26 places, 20 transitions, 89 flow [2023-11-17 12:15:49,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=89, PETRI_PLACES=26, PETRI_TRANSITIONS=20} [2023-11-17 12:15:49,807 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 6 predicate places. [2023-11-17 12:15:49,807 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 20 transitions, 89 flow [2023-11-17 12:15:49,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:49,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:49,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:49,812 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 12:15:50,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:50,012 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:50,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:50,013 INFO L85 PathProgramCache]: Analyzing trace with hash 462789707, now seen corresponding path program 3 times [2023-11-17 12:15:50,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:50,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429976756] [2023-11-17 12:15:50,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:50,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:50,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:50,101 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 12:15:50,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:50,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429976756] [2023-11-17 12:15:50,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429976756] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:15:50,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:15:50,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:15:50,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077063972] [2023-11-17 12:15:50,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:15:50,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:15:50,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:50,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:15:50,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:15:50,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:15:50,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 20 transitions, 89 flow. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:50,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:50,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:15:50,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:50,182 INFO L124 PetriNetUnfolderBase]: 69/126 cut-off events. [2023-11-17 12:15:50,183 INFO L125 PetriNetUnfolderBase]: For 140/140 co-relation queries the response was YES. [2023-11-17 12:15:50,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 126 events. 69/126 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 312 event pairs, 19 based on Foata normal form. 2/128 useless extension candidates. Maximal degree in co-relation 159. Up to 89 conditions per place. [2023-11-17 12:15:50,185 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 22 selfloop transitions, 8 changer transitions 2/32 dead transitions. [2023-11-17 12:15:50,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 32 transitions, 202 flow [2023-11-17 12:15:50,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:15:50,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:15:50,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2023-11-17 12:15:50,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34285714285714286 [2023-11-17 12:15:50,187 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 48 transitions. [2023-11-17 12:15:50,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 48 transitions. [2023-11-17 12:15:50,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:50,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 48 transitions. [2023-11-17 12:15:50,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:50,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:50,188 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:50,188 INFO L175 Difference]: Start difference. First operand has 26 places, 20 transitions, 89 flow. Second operand 5 states and 48 transitions. [2023-11-17 12:15:50,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 32 transitions, 202 flow [2023-11-17 12:15:50,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 197 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 12:15:50,190 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 144 flow [2023-11-17 12:15:50,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=144, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-11-17 12:15:50,192 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 12 predicate places. [2023-11-17 12:15:50,192 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 144 flow [2023-11-17 12:15:50,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:50,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:50,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:50,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 12:15:50,192 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:50,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:50,193 INFO L85 PathProgramCache]: Analyzing trace with hash 744662393, now seen corresponding path program 4 times [2023-11-17 12:15:50,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:50,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832613160] [2023-11-17 12:15:50,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:50,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:50,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:50,278 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 12:15:50,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:50,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832613160] [2023-11-17 12:15:50,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832613160] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:15:50,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:15:50,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:15:50,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13286550] [2023-11-17 12:15:50,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:15:50,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:15:50,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:50,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:15:50,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:15:50,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:15:50,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:50,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:50,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:15:50,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:50,366 INFO L124 PetriNetUnfolderBase]: 66/129 cut-off events. [2023-11-17 12:15:50,366 INFO L125 PetriNetUnfolderBase]: For 287/287 co-relation queries the response was YES. [2023-11-17 12:15:50,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 518 conditions, 129 events. 66/129 cut-off events. For 287/287 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 334 event pairs, 21 based on Foata normal form. 4/133 useless extension candidates. Maximal degree in co-relation 243. Up to 75 conditions per place. [2023-11-17 12:15:50,368 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 29 selfloop transitions, 6 changer transitions 2/37 dead transitions. [2023-11-17 12:15:50,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 37 transitions, 261 flow [2023-11-17 12:15:50,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:15:50,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:15:50,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 53 transitions. [2023-11-17 12:15:50,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2023-11-17 12:15:50,369 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 53 transitions. [2023-11-17 12:15:50,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 53 transitions. [2023-11-17 12:15:50,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:50,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 53 transitions. [2023-11-17 12:15:50,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:50,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:50,370 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:50,370 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 144 flow. Second operand 5 states and 53 transitions. [2023-11-17 12:15:50,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 37 transitions, 261 flow [2023-11-17 12:15:50,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 37 transitions, 247 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-17 12:15:50,373 INFO L231 Difference]: Finished difference. Result has 35 places, 24 transitions, 149 flow [2023-11-17 12:15:50,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=149, PETRI_PLACES=35, PETRI_TRANSITIONS=24} [2023-11-17 12:15:50,375 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 15 predicate places. [2023-11-17 12:15:50,375 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 24 transitions, 149 flow [2023-11-17 12:15:50,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:50,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:50,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:50,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 12:15:50,376 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:50,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:50,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1398279727, now seen corresponding path program 5 times [2023-11-17 12:15:50,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:50,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265235065] [2023-11-17 12:15:50,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:50,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:50,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:50,455 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 12:15:50,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:50,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265235065] [2023-11-17 12:15:50,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265235065] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:50,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401188223] [2023-11-17 12:15:50,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:15:50,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:50,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:50,457 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 12:15:50,490 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 12:15:50,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:15:50,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:50,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:15:50,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:50,560 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 12:15:50,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:50,587 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 12:15:50,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401188223] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:50,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:50,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-11-17 12:15:50,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110090995] [2023-11-17 12:15:50,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:50,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 12:15:50,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:50,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 12:15:50,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-17 12:15:50,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:15:50,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 24 transitions, 149 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:50,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:50,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:15:50,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:50,682 INFO L124 PetriNetUnfolderBase]: 84/161 cut-off events. [2023-11-17 12:15:50,682 INFO L125 PetriNetUnfolderBase]: For 540/540 co-relation queries the response was YES. [2023-11-17 12:15:50,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 661 conditions, 161 events. 84/161 cut-off events. For 540/540 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 467 event pairs, 28 based on Foata normal form. 6/167 useless extension candidates. Maximal degree in co-relation 348. Up to 116 conditions per place. [2023-11-17 12:15:50,683 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 33 selfloop transitions, 15 changer transitions 1/49 dead transitions. [2023-11-17 12:15:50,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 49 transitions, 364 flow [2023-11-17 12:15:50,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:15:50,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 12:15:50,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 77 transitions. [2023-11-17 12:15:50,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34375 [2023-11-17 12:15:50,684 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 77 transitions. [2023-11-17 12:15:50,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 77 transitions. [2023-11-17 12:15:50,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:50,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 77 transitions. [2023-11-17 12:15:50,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:50,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:50,686 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:50,686 INFO L175 Difference]: Start difference. First operand has 35 places, 24 transitions, 149 flow. Second operand 8 states and 77 transitions. [2023-11-17 12:15:50,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 49 transitions, 364 flow [2023-11-17 12:15:50,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 49 transitions, 342 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-17 12:15:50,688 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 239 flow [2023-11-17 12:15:50,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=239, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2023-11-17 12:15:50,688 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 21 predicate places. [2023-11-17 12:15:50,688 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 239 flow [2023-11-17 12:15:50,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:50,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:50,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:50,692 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 12:15:50,892 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,SelfDestructingSolverStorable5 [2023-11-17 12:15:50,895 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:50,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:50,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1168584545, now seen corresponding path program 6 times [2023-11-17 12:15:50,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:50,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868506087] [2023-11-17 12:15:50,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:50,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:50,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:50,958 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 12:15:50,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:50,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868506087] [2023-11-17 12:15:50,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868506087] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:50,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720413242] [2023-11-17 12:15:50,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:15:50,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:50,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:50,960 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 12:15:50,972 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 12:15:51,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:15:51,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:51,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:15:51,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:51,043 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 12:15:51,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:51,069 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 12:15:51,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720413242] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:51,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:51,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-17 12:15:51,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55220797] [2023-11-17 12:15:51,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:51,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 12:15:51,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:51,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 12:15:51,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-17 12:15:51,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:15:51,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 239 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:51,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:51,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:15:51,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:51,122 INFO L124 PetriNetUnfolderBase]: 77/144 cut-off events. [2023-11-17 12:15:51,122 INFO L125 PetriNetUnfolderBase]: For 596/596 co-relation queries the response was YES. [2023-11-17 12:15:51,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 669 conditions, 144 events. 77/144 cut-off events. For 596/596 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 376 event pairs, 21 based on Foata normal form. 6/150 useless extension candidates. Maximal degree in co-relation 549. Up to 91 conditions per place. [2023-11-17 12:15:51,124 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 26 selfloop transitions, 13 changer transitions 0/39 dead transitions. [2023-11-17 12:15:51,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 39 transitions, 337 flow [2023-11-17 12:15:51,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:15:51,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:15:51,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 51 transitions. [2023-11-17 12:15:51,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36428571428571427 [2023-11-17 12:15:51,125 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 51 transitions. [2023-11-17 12:15:51,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 51 transitions. [2023-11-17 12:15:51,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:51,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 51 transitions. [2023-11-17 12:15:51,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:51,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:51,125 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:51,126 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 239 flow. Second operand 5 states and 51 transitions. [2023-11-17 12:15:51,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 39 transitions, 337 flow [2023-11-17 12:15:51,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 39 transitions, 310 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-11-17 12:15:51,128 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 226 flow [2023-11-17 12:15:51,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=226, PETRI_PLACES=41, PETRI_TRANSITIONS=30} [2023-11-17 12:15:51,129 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 21 predicate places. [2023-11-17 12:15:51,129 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 226 flow [2023-11-17 12:15:51,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:51,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:51,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:51,136 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 12:15:51,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:51,334 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:51,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:51,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1016277401, now seen corresponding path program 1 times [2023-11-17 12:15:51,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:51,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846943249] [2023-11-17 12:15:51,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:51,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:51,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:51,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846943249] [2023-11-17 12:15:51,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846943249] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:51,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884296287] [2023-11-17 12:15:51,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:51,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:51,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:51,418 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 12:15:51,421 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 12:15:51,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:51,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 12:15:51,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:51,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:51,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:51,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:51,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884296287] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:51,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:51,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 5 [2023-11-17 12:15:51,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669717856] [2023-11-17 12:15:51,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:51,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 12:15:51,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:51,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 12:15:51,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-17 12:15:51,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2023-11-17 12:15:51,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 30 transitions, 226 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:51,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:51,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2023-11-17 12:15:51,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:51,576 INFO L124 PetriNetUnfolderBase]: 142/268 cut-off events. [2023-11-17 12:15:51,576 INFO L125 PetriNetUnfolderBase]: For 961/961 co-relation queries the response was YES. [2023-11-17 12:15:51,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1215 conditions, 268 events. 142/268 cut-off events. For 961/961 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 951 event pairs, 22 based on Foata normal form. 7/275 useless extension candidates. Maximal degree in co-relation 989. Up to 130 conditions per place. [2023-11-17 12:15:51,578 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 40 selfloop transitions, 11 changer transitions 6/57 dead transitions. [2023-11-17 12:15:51,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 57 transitions, 500 flow [2023-11-17 12:15:51,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 12:15:51,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 12:15:51,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 59 transitions. [2023-11-17 12:15:51,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267857142857143 [2023-11-17 12:15:51,579 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 59 transitions. [2023-11-17 12:15:51,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 59 transitions. [2023-11-17 12:15:51,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:51,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 59 transitions. [2023-11-17 12:15:51,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:51,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:51,580 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:51,580 INFO L175 Difference]: Start difference. First operand has 41 places, 30 transitions, 226 flow. Second operand 4 states and 59 transitions. [2023-11-17 12:15:51,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 57 transitions, 500 flow [2023-11-17 12:15:51,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 57 transitions, 468 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-17 12:15:51,582 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 317 flow [2023-11-17 12:15:51,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=317, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2023-11-17 12:15:51,583 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 23 predicate places. [2023-11-17 12:15:51,583 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 317 flow [2023-11-17 12:15:51,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:51,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:51,583 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:51,590 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 12:15:51,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:51,788 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:51,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:51,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1698905624, now seen corresponding path program 2 times [2023-11-17 12:15:51,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:51,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674362536] [2023-11-17 12:15:51,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:51,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:51,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:51,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:51,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674362536] [2023-11-17 12:15:51,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674362536] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:51,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076701168] [2023-11-17 12:15:51,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:15:51,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:51,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:51,874 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 12:15:51,900 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 12:15:51,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:15:51,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:51,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:15:51,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:51,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:51,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:52,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076701168] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:52,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:52,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-11-17 12:15:52,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079765469] [2023-11-17 12:15:52,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:52,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 12:15:52,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:52,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 12:15:52,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:15:52,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:15:52,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 317 flow. Second operand has 14 states, 14 states have (on average 6.357142857142857) internal successors, (89), 14 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:52,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:52,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:15:52,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:52,434 INFO L124 PetriNetUnfolderBase]: 260/444 cut-off events. [2023-11-17 12:15:52,434 INFO L125 PetriNetUnfolderBase]: For 1566/1566 co-relation queries the response was YES. [2023-11-17 12:15:52,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2195 conditions, 444 events. 260/444 cut-off events. For 1566/1566 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1667 event pairs, 24 based on Foata normal form. 14/458 useless extension candidates. Maximal degree in co-relation 1423. Up to 183 conditions per place. [2023-11-17 12:15:52,437 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 55 selfloop transitions, 61 changer transitions 11/127 dead transitions. [2023-11-17 12:15:52,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 127 transitions, 1236 flow [2023-11-17 12:15:52,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 12:15:52,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 12:15:52,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 170 transitions. [2023-11-17 12:15:52,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31954887218045114 [2023-11-17 12:15:52,438 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 170 transitions. [2023-11-17 12:15:52,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 170 transitions. [2023-11-17 12:15:52,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:52,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 170 transitions. [2023-11-17 12:15:52,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 8.947368421052632) internal successors, (170), 19 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:52,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 28.0) internal successors, (560), 20 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:52,440 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 28.0) internal successors, (560), 20 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:52,440 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 317 flow. Second operand 19 states and 170 transitions. [2023-11-17 12:15:52,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 127 transitions, 1236 flow [2023-11-17 12:15:52,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 127 transitions, 1200 flow, removed 18 selfloop flow, removed 0 redundant places. [2023-11-17 12:15:52,444 INFO L231 Difference]: Finished difference. Result has 67 places, 82 transitions, 925 flow [2023-11-17 12:15:52,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=925, PETRI_PLACES=67, PETRI_TRANSITIONS=82} [2023-11-17 12:15:52,445 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 47 predicate places. [2023-11-17 12:15:52,445 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 82 transitions, 925 flow [2023-11-17 12:15:52,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.357142857142857) internal successors, (89), 14 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:52,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:52,445 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:52,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:52,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:52,650 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:52,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:52,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1297338626, now seen corresponding path program 3 times [2023-11-17 12:15:52,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:52,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912899279] [2023-11-17 12:15:52,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:52,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:52,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:52,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:52,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912899279] [2023-11-17 12:15:52,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912899279] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:52,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469147044] [2023-11-17 12:15:52,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:15:52,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:52,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:52,758 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 12:15:52,760 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 12:15:52,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:15:52,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:52,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:15:52,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:52,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:52,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:52,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:52,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469147044] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:52,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:52,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2023-11-17 12:15:52,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85968992] [2023-11-17 12:15:52,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:52,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:15:52,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:52,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:15:52,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:15:52,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:15:52,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 82 transitions, 925 flow. Second operand has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:52,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:52,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:15:52,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:53,150 INFO L124 PetriNetUnfolderBase]: 256/432 cut-off events. [2023-11-17 12:15:53,150 INFO L125 PetriNetUnfolderBase]: For 2509/2509 co-relation queries the response was YES. [2023-11-17 12:15:53,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2619 conditions, 432 events. 256/432 cut-off events. For 2509/2509 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1548 event pairs, 3 based on Foata normal form. 10/442 useless extension candidates. Maximal degree in co-relation 1786. Up to 175 conditions per place. [2023-11-17 12:15:53,153 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 79 selfloop transitions, 50 changer transitions 1/130 dead transitions. [2023-11-17 12:15:53,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 130 transitions, 1542 flow [2023-11-17 12:15:53,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 12:15:53,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 12:15:53,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 124 transitions. [2023-11-17 12:15:53,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34065934065934067 [2023-11-17 12:15:53,154 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 124 transitions. [2023-11-17 12:15:53,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 124 transitions. [2023-11-17 12:15:53,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:53,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 124 transitions. [2023-11-17 12:15:53,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 9.538461538461538) internal successors, (124), 13 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:53,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 28.0) internal successors, (392), 14 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:53,155 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 28.0) internal successors, (392), 14 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:53,155 INFO L175 Difference]: Start difference. First operand has 67 places, 82 transitions, 925 flow. Second operand 13 states and 124 transitions. [2023-11-17 12:15:53,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 130 transitions, 1542 flow [2023-11-17 12:15:53,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 130 transitions, 1216 flow, removed 157 selfloop flow, removed 3 redundant places. [2023-11-17 12:15:53,164 INFO L231 Difference]: Finished difference. Result has 80 places, 93 transitions, 902 flow [2023-11-17 12:15:53,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=902, PETRI_PLACES=80, PETRI_TRANSITIONS=93} [2023-11-17 12:15:53,165 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 60 predicate places. [2023-11-17 12:15:53,165 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 93 transitions, 902 flow [2023-11-17 12:15:53,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:53,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:53,165 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:53,184 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 12:15:53,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:53,370 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:53,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:53,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1244767870, now seen corresponding path program 4 times [2023-11-17 12:15:53,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:53,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560189111] [2023-11-17 12:15:53,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:53,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:53,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:53,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560189111] [2023-11-17 12:15:53,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560189111] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:53,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800393245] [2023-11-17 12:15:53,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:15:53,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:53,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:53,461 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 12:15:53,480 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 12:15:53,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:15:53,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:53,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:15:53,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:53,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:53,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:53,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:53,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800393245] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:53,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:53,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-11-17 12:15:53,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568420809] [2023-11-17 12:15:53,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:53,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 12:15:53,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:53,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 12:15:53,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:15:53,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:15:53,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 93 transitions, 902 flow. Second operand has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:53,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:53,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:15:53,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:53,970 INFO L124 PetriNetUnfolderBase]: 316/530 cut-off events. [2023-11-17 12:15:53,971 INFO L125 PetriNetUnfolderBase]: For 3556/3556 co-relation queries the response was YES. [2023-11-17 12:15:53,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2834 conditions, 530 events. 316/530 cut-off events. For 3556/3556 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2012 event pairs, 23 based on Foata normal form. 24/554 useless extension candidates. Maximal degree in co-relation 2650. Up to 184 conditions per place. [2023-11-17 12:15:53,974 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 90 selfloop transitions, 76 changer transitions 1/167 dead transitions. [2023-11-17 12:15:53,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 167 transitions, 1731 flow [2023-11-17 12:15:53,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 12:15:53,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 12:15:53,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 184 transitions. [2023-11-17 12:15:53,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32857142857142857 [2023-11-17 12:15:53,976 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 184 transitions. [2023-11-17 12:15:53,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 184 transitions. [2023-11-17 12:15:53,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:53,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 184 transitions. [2023-11-17 12:15:53,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 9.2) internal successors, (184), 20 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:53,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 28.0) internal successors, (588), 21 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:53,977 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 28.0) internal successors, (588), 21 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:53,977 INFO L175 Difference]: Start difference. First operand has 80 places, 93 transitions, 902 flow. Second operand 20 states and 184 transitions. [2023-11-17 12:15:53,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 167 transitions, 1731 flow [2023-11-17 12:15:53,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 167 transitions, 1644 flow, removed 36 selfloop flow, removed 3 redundant places. [2023-11-17 12:15:53,990 INFO L231 Difference]: Finished difference. Result has 104 places, 120 transitions, 1311 flow [2023-11-17 12:15:53,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1311, PETRI_PLACES=104, PETRI_TRANSITIONS=120} [2023-11-17 12:15:53,991 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 84 predicate places. [2023-11-17 12:15:53,991 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 120 transitions, 1311 flow [2023-11-17 12:15:53,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:53,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:53,991 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:53,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:54,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:54,199 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:54,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:54,199 INFO L85 PathProgramCache]: Analyzing trace with hash 419796250, now seen corresponding path program 5 times [2023-11-17 12:15:54,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:54,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340767476] [2023-11-17 12:15:54,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:54,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:54,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:54,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:54,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340767476] [2023-11-17 12:15:54,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340767476] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:54,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930038479] [2023-11-17 12:15:54,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:15:54,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:54,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:54,277 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 12:15:54,303 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 12:15:54,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:15:54,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:54,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 12:15:54,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:54,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:54,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:54,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:54,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930038479] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:54,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:54,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-11-17 12:15:54,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202335113] [2023-11-17 12:15:54,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:54,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 12:15:54,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:54,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 12:15:54,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:15:54,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:15:54,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 120 transitions, 1311 flow. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 14 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:54,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:54,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:15:54,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:54,777 INFO L124 PetriNetUnfolderBase]: 383/668 cut-off events. [2023-11-17 12:15:54,777 INFO L125 PetriNetUnfolderBase]: For 6989/6989 co-relation queries the response was YES. [2023-11-17 12:15:54,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4001 conditions, 668 events. 383/668 cut-off events. For 6989/6989 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2851 event pairs, 32 based on Foata normal form. 26/694 useless extension candidates. Maximal degree in co-relation 3709. Up to 209 conditions per place. [2023-11-17 12:15:54,782 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 87 selfloop transitions, 92 changer transitions 8/187 dead transitions. [2023-11-17 12:15:54,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 187 transitions, 2219 flow [2023-11-17 12:15:54,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:15:54,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 12:15:54,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 146 transitions. [2023-11-17 12:15:54,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32589285714285715 [2023-11-17 12:15:54,783 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 146 transitions. [2023-11-17 12:15:54,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 146 transitions. [2023-11-17 12:15:54,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:54,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 146 transitions. [2023-11-17 12:15:54,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 9.125) internal successors, (146), 16 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:54,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 28.0) internal successors, (476), 17 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:54,785 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 28.0) internal successors, (476), 17 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:54,785 INFO L175 Difference]: Start difference. First operand has 104 places, 120 transitions, 1311 flow. Second operand 16 states and 146 transitions. [2023-11-17 12:15:54,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 187 transitions, 2219 flow [2023-11-17 12:15:54,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 187 transitions, 2015 flow, removed 73 selfloop flow, removed 7 redundant places. [2023-11-17 12:15:54,801 INFO L231 Difference]: Finished difference. Result has 117 places, 138 transitions, 1628 flow [2023-11-17 12:15:54,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1154, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1628, PETRI_PLACES=117, PETRI_TRANSITIONS=138} [2023-11-17 12:15:54,801 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 97 predicate places. [2023-11-17 12:15:54,801 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 138 transitions, 1628 flow [2023-11-17 12:15:54,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 14 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:54,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:54,801 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:54,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:55,004 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,SelfDestructingSolverStorable11 [2023-11-17 12:15:55,005 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:55,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:55,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1634669554, now seen corresponding path program 6 times [2023-11-17 12:15:55,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:55,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825646137] [2023-11-17 12:15:55,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:55,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:55,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:55,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:55,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:55,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825646137] [2023-11-17 12:15:55,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825646137] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:55,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420166403] [2023-11-17 12:15:55,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:15:55,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:55,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:55,097 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 12:15:55,125 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 12:15:55,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:15:55,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:55,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:15:55,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:55,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:55,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:55,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:55,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420166403] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:55,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:55,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-11-17 12:15:55,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263944541] [2023-11-17 12:15:55,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:55,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:15:55,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:55,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:15:55,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:15:55,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:15:55,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 138 transitions, 1628 flow. Second operand has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:55,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:55,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:15:55,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:55,663 INFO L124 PetriNetUnfolderBase]: 536/916 cut-off events. [2023-11-17 12:15:55,663 INFO L125 PetriNetUnfolderBase]: For 13752/13752 co-relation queries the response was YES. [2023-11-17 12:15:55,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6027 conditions, 916 events. 536/916 cut-off events. For 13752/13752 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4186 event pairs, 85 based on Foata normal form. 40/956 useless extension candidates. Maximal degree in co-relation 5635. Up to 556 conditions per place. [2023-11-17 12:15:55,670 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 163 selfloop transitions, 111 changer transitions 3/277 dead transitions. [2023-11-17 12:15:55,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 277 transitions, 3646 flow [2023-11-17 12:15:55,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 12:15:55,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 12:15:55,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 218 transitions. [2023-11-17 12:15:55,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3244047619047619 [2023-11-17 12:15:55,672 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 218 transitions. [2023-11-17 12:15:55,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 218 transitions. [2023-11-17 12:15:55,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:55,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 218 transitions. [2023-11-17 12:15:55,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 9.083333333333334) internal successors, (218), 24 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:55,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 28.0) internal successors, (700), 25 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:55,676 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 28.0) internal successors, (700), 25 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:55,676 INFO L175 Difference]: Start difference. First operand has 117 places, 138 transitions, 1628 flow. Second operand 24 states and 218 transitions. [2023-11-17 12:15:55,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 277 transitions, 3646 flow [2023-11-17 12:15:55,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 277 transitions, 3398 flow, removed 75 selfloop flow, removed 6 redundant places. [2023-11-17 12:15:55,708 INFO L231 Difference]: Finished difference. Result has 143 places, 203 transitions, 2848 flow [2023-11-17 12:15:55,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1492, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2848, PETRI_PLACES=143, PETRI_TRANSITIONS=203} [2023-11-17 12:15:55,709 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 123 predicate places. [2023-11-17 12:15:55,709 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 203 transitions, 2848 flow [2023-11-17 12:15:55,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:55,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:55,710 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:55,716 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 12:15:55,916 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,SelfDestructingSolverStorable12 [2023-11-17 12:15:55,917 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:55,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:55,917 INFO L85 PathProgramCache]: Analyzing trace with hash -2097581182, now seen corresponding path program 7 times [2023-11-17 12:15:55,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:55,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337743932] [2023-11-17 12:15:55,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:55,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:55,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:55,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:55,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:55,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337743932] [2023-11-17 12:15:55,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337743932] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:55,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098764055] [2023-11-17 12:15:55,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:15:55,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:55,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:55,998 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 12:15:56,020 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 12:15:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:56,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:15:56,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:56,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:56,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:56,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:56,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098764055] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:56,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:56,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-11-17 12:15:56,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444039230] [2023-11-17 12:15:56,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:56,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:15:56,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:56,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:15:56,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:15:56,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:15:56,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 203 transitions, 2848 flow. Second operand has 15 states, 15 states have (on average 5.8) internal successors, (87), 15 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:56,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:56,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:15:56,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:56,465 INFO L124 PetriNetUnfolderBase]: 603/1031 cut-off events. [2023-11-17 12:15:56,465 INFO L125 PetriNetUnfolderBase]: For 15813/15813 co-relation queries the response was YES. [2023-11-17 12:15:56,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7306 conditions, 1031 events. 603/1031 cut-off events. For 15813/15813 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 4791 event pairs, 76 based on Foata normal form. 28/1059 useless extension candidates. Maximal degree in co-relation 6837. Up to 583 conditions per place. [2023-11-17 12:15:56,473 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 112 selfloop transitions, 149 changer transitions 5/266 dead transitions. [2023-11-17 12:15:56,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 266 transitions, 4111 flow [2023-11-17 12:15:56,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:15:56,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 12:15:56,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 141 transitions. [2023-11-17 12:15:56,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31473214285714285 [2023-11-17 12:15:56,474 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 141 transitions. [2023-11-17 12:15:56,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 141 transitions. [2023-11-17 12:15:56,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:56,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 141 transitions. [2023-11-17 12:15:56,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 8.8125) internal successors, (141), 16 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:56,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 28.0) internal successors, (476), 17 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:56,475 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 28.0) internal successors, (476), 17 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:56,475 INFO L175 Difference]: Start difference. First operand has 143 places, 203 transitions, 2848 flow. Second operand 16 states and 141 transitions. [2023-11-17 12:15:56,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 266 transitions, 4111 flow [2023-11-17 12:15:56,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 266 transitions, 3450 flow, removed 299 selfloop flow, removed 7 redundant places. [2023-11-17 12:15:56,517 INFO L231 Difference]: Finished difference. Result has 154 places, 233 transitions, 3261 flow [2023-11-17 12:15:56,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2281, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3261, PETRI_PLACES=154, PETRI_TRANSITIONS=233} [2023-11-17 12:15:56,518 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 134 predicate places. [2023-11-17 12:15:56,518 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 233 transitions, 3261 flow [2023-11-17 12:15:56,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.8) internal successors, (87), 15 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:56,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:56,518 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:56,526 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 12:15:56,722 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,SelfDestructingSolverStorable13 [2023-11-17 12:15:56,722 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:56,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:56,723 INFO L85 PathProgramCache]: Analyzing trace with hash -107076854, now seen corresponding path program 8 times [2023-11-17 12:15:56,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:56,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999028858] [2023-11-17 12:15:56,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:56,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:56,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:56,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:56,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:56,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999028858] [2023-11-17 12:15:56,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999028858] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:56,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662063433] [2023-11-17 12:15:56,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:15:56,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:56,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:56,796 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 12:15:56,801 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 12:15:56,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:15:56,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:56,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:15:56,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:56,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:56,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:56,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:56,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662063433] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:56,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:56,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-11-17 12:15:56,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700001163] [2023-11-17 12:15:56,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:56,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 12:15:56,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:56,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 12:15:56,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:15:56,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:15:56,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 233 transitions, 3261 flow. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 14 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:56,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:56,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:15:56,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:57,259 INFO L124 PetriNetUnfolderBase]: 580/1008 cut-off events. [2023-11-17 12:15:57,260 INFO L125 PetriNetUnfolderBase]: For 8728/8728 co-relation queries the response was YES. [2023-11-17 12:15:57,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7052 conditions, 1008 events. 580/1008 cut-off events. For 8728/8728 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4749 event pairs, 97 based on Foata normal form. 8/1016 useless extension candidates. Maximal degree in co-relation 6687. Up to 656 conditions per place. [2023-11-17 12:15:57,267 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 116 selfloop transitions, 131 changer transitions 4/251 dead transitions. [2023-11-17 12:15:57,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 251 transitions, 3834 flow [2023-11-17 12:15:57,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 12:15:57,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 12:15:57,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 116 transitions. [2023-11-17 12:15:57,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29591836734693877 [2023-11-17 12:15:57,268 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 116 transitions. [2023-11-17 12:15:57,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 116 transitions. [2023-11-17 12:15:57,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:57,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 116 transitions. [2023-11-17 12:15:57,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 8.285714285714286) internal successors, (116), 14 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:57,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 28.0) internal successors, (420), 15 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:57,269 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 28.0) internal successors, (420), 15 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:57,269 INFO L175 Difference]: Start difference. First operand has 154 places, 233 transitions, 3261 flow. Second operand 14 states and 116 transitions. [2023-11-17 12:15:57,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 251 transitions, 3834 flow [2023-11-17 12:15:57,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 251 transitions, 3568 flow, removed 101 selfloop flow, removed 5 redundant places. [2023-11-17 12:15:57,308 INFO L231 Difference]: Finished difference. Result has 163 places, 230 transitions, 3254 flow [2023-11-17 12:15:57,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2956, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3254, PETRI_PLACES=163, PETRI_TRANSITIONS=230} [2023-11-17 12:15:57,309 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 143 predicate places. [2023-11-17 12:15:57,309 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 230 transitions, 3254 flow [2023-11-17 12:15:57,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 14 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:57,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:57,309 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:57,314 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 12:15:57,514 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,SelfDestructingSolverStorable14 [2023-11-17 12:15:57,514 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:57,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:57,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1256507500, now seen corresponding path program 9 times [2023-11-17 12:15:57,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:57,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295341861] [2023-11-17 12:15:57,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:57,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:57,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:57,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:57,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295341861] [2023-11-17 12:15:57,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295341861] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:57,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045447305] [2023-11-17 12:15:57,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:15:57,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:57,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:57,581 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 12:15:57,587 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 12:15:57,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:15:57,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:57,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:15:57,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:57,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:57,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:57,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:57,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045447305] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:57,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:57,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-17 12:15:57,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576722759] [2023-11-17 12:15:57,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:57,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 12:15:57,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:57,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 12:15:57,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-17 12:15:57,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:15:57,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 230 transitions, 3254 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:57,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:57,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:15:57,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:57,992 INFO L124 PetriNetUnfolderBase]: 784/1390 cut-off events. [2023-11-17 12:15:57,992 INFO L125 PetriNetUnfolderBase]: For 13256/13256 co-relation queries the response was YES. [2023-11-17 12:15:57,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9767 conditions, 1390 events. 784/1390 cut-off events. For 13256/13256 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7348 event pairs, 51 based on Foata normal form. 16/1406 useless extension candidates. Maximal degree in co-relation 9369. Up to 728 conditions per place. [2023-11-17 12:15:58,002 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 211 selfloop transitions, 97 changer transitions 41/349 dead transitions. [2023-11-17 12:15:58,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 349 transitions, 5477 flow [2023-11-17 12:15:58,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:15:58,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:15:58,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 80 transitions. [2023-11-17 12:15:58,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2023-11-17 12:15:58,003 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 80 transitions. [2023-11-17 12:15:58,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 80 transitions. [2023-11-17 12:15:58,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:58,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 80 transitions. [2023-11-17 12:15:58,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:58,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 28.0) internal successors, (196), 7 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:58,004 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 28.0) internal successors, (196), 7 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:58,004 INFO L175 Difference]: Start difference. First operand has 163 places, 230 transitions, 3254 flow. Second operand 6 states and 80 transitions. [2023-11-17 12:15:58,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 349 transitions, 5477 flow [2023-11-17 12:15:58,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 349 transitions, 5069 flow, removed 21 selfloop flow, removed 12 redundant places. [2023-11-17 12:15:58,046 INFO L231 Difference]: Finished difference. Result has 158 places, 256 transitions, 3758 flow [2023-11-17 12:15:58,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2945, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3758, PETRI_PLACES=158, PETRI_TRANSITIONS=256} [2023-11-17 12:15:58,047 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 138 predicate places. [2023-11-17 12:15:58,047 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 256 transitions, 3758 flow [2023-11-17 12:15:58,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:58,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:58,047 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:58,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-17 12:15:58,251 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,SelfDestructingSolverStorable15 [2023-11-17 12:15:58,251 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:58,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:58,251 INFO L85 PathProgramCache]: Analyzing trace with hash -461117793, now seen corresponding path program 10 times [2023-11-17 12:15:58,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:58,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044689499] [2023-11-17 12:15:58,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:58,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:58,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:58,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:58,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:58,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044689499] [2023-11-17 12:15:58,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044689499] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:58,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476607258] [2023-11-17 12:15:58,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:15:58,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:58,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:58,374 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 12:15:58,377 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 12:15:58,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:15:58,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:58,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:15:58,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:58,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:58,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:58,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:58,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476607258] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:58,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:58,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-17 12:15:58,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541504013] [2023-11-17 12:15:58,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:58,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:15:58,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:58,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:15:58,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:15:58,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:15:58,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 256 transitions, 3758 flow. Second operand has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:58,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:58,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:15:58,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:59,204 INFO L124 PetriNetUnfolderBase]: 1270/2124 cut-off events. [2023-11-17 12:15:59,205 INFO L125 PetriNetUnfolderBase]: For 19033/19033 co-relation queries the response was YES. [2023-11-17 12:15:59,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15707 conditions, 2124 events. 1270/2124 cut-off events. For 19033/19033 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 11425 event pairs, 25 based on Foata normal form. 20/2144 useless extension candidates. Maximal degree in co-relation 15121. Up to 840 conditions per place. [2023-11-17 12:15:59,224 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 288 selfloop transitions, 244 changer transitions 9/541 dead transitions. [2023-11-17 12:15:59,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 541 transitions, 8710 flow [2023-11-17 12:15:59,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 12:15:59,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 12:15:59,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 195 transitions. [2023-11-17 12:15:59,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33163265306122447 [2023-11-17 12:15:59,225 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 195 transitions. [2023-11-17 12:15:59,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 195 transitions. [2023-11-17 12:15:59,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:59,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 195 transitions. [2023-11-17 12:15:59,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 9.285714285714286) internal successors, (195), 21 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:59,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 28.0) internal successors, (616), 22 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:59,227 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 28.0) internal successors, (616), 22 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:59,227 INFO L175 Difference]: Start difference. First operand has 158 places, 256 transitions, 3758 flow. Second operand 21 states and 195 transitions. [2023-11-17 12:15:59,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 541 transitions, 8710 flow [2023-11-17 12:15:59,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 541 transitions, 8582 flow, removed 58 selfloop flow, removed 3 redundant places. [2023-11-17 12:15:59,311 INFO L231 Difference]: Finished difference. Result has 186 places, 421 transitions, 6950 flow [2023-11-17 12:15:59,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3688, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6950, PETRI_PLACES=186, PETRI_TRANSITIONS=421} [2023-11-17 12:15:59,312 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 166 predicate places. [2023-11-17 12:15:59,312 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 421 transitions, 6950 flow [2023-11-17 12:15:59,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:59,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:59,312 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:59,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:59,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-17 12:15:59,517 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:59,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:59,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1523127871, now seen corresponding path program 11 times [2023-11-17 12:15:59,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:59,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695860335] [2023-11-17 12:15:59,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:59,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:59,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:59,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:59,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:59,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695860335] [2023-11-17 12:15:59,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695860335] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:59,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58002647] [2023-11-17 12:15:59,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:15:59,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:59,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:59,683 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:15:59,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-17 12:15:59,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:15:59,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:59,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 12:15:59,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:59,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:59,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:59,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58002647] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:59,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:59,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2023-11-17 12:15:59,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899769256] [2023-11-17 12:15:59,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:59,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:15:59,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:59,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:15:59,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:15:59,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:15:59,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 421 transitions, 6950 flow. Second operand has 21 states, 21 states have (on average 5.619047619047619) internal successors, (118), 21 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:59,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:59,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:15:59,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:16:01,422 INFO L124 PetriNetUnfolderBase]: 1661/2738 cut-off events. [2023-11-17 12:16:01,422 INFO L125 PetriNetUnfolderBase]: For 39347/39347 co-relation queries the response was YES. [2023-11-17 12:16:01,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23499 conditions, 2738 events. 1661/2738 cut-off events. For 39347/39347 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 15285 event pairs, 101 based on Foata normal form. 32/2770 useless extension candidates. Maximal degree in co-relation 22879. Up to 928 conditions per place. [2023-11-17 12:16:01,450 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 271 selfloop transitions, 381 changer transitions 6/658 dead transitions. [2023-11-17 12:16:01,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 658 transitions, 12127 flow [2023-11-17 12:16:01,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-17 12:16:01,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-17 12:16:01,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 218 transitions. [2023-11-17 12:16:01,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31142857142857144 [2023-11-17 12:16:01,452 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 218 transitions. [2023-11-17 12:16:01,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 218 transitions. [2023-11-17 12:16:01,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:16:01,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 218 transitions. [2023-11-17 12:16:01,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 8.72) internal successors, (218), 25 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:01,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 28.0) internal successors, (728), 26 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:01,454 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 28.0) internal successors, (728), 26 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:01,454 INFO L175 Difference]: Start difference. First operand has 186 places, 421 transitions, 6950 flow. Second operand 25 states and 218 transitions. [2023-11-17 12:16:01,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 658 transitions, 12127 flow [2023-11-17 12:16:01,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 658 transitions, 11635 flow, removed 225 selfloop flow, removed 4 redundant places. [2023-11-17 12:16:01,642 INFO L231 Difference]: Finished difference. Result has 215 places, 579 transitions, 10823 flow [2023-11-17 12:16:01,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=6649, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=10823, PETRI_PLACES=215, PETRI_TRANSITIONS=579} [2023-11-17 12:16:01,643 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 195 predicate places. [2023-11-17 12:16:01,643 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 579 transitions, 10823 flow [2023-11-17 12:16:01,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.619047619047619) internal successors, (118), 21 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:01,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:16:01,643 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:16:01,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-17 12:16:01,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:01,844 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:16:01,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:16:01,844 INFO L85 PathProgramCache]: Analyzing trace with hash 860616903, now seen corresponding path program 12 times [2023-11-17 12:16:01,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:16:01,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334608653] [2023-11-17 12:16:01,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:16:01,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:16:01,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:01,937 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:01,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:16:01,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334608653] [2023-11-17 12:16:01,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334608653] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:16:01,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319104416] [2023-11-17 12:16:01,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:16:01,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:01,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:16:01,938 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:16:01,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-17 12:16:01,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:16:01,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:16:02,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:16:02,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:16:02,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:02,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:16:02,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:02,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319104416] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:16:02,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:16:02,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-11-17 12:16:02,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589274650] [2023-11-17 12:16:02,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:16:02,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 12:16:02,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:16:02,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 12:16:02,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-11-17 12:16:02,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:16:02,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 579 transitions, 10823 flow. Second operand has 16 states, 16 states have (on average 5.9375) internal successors, (95), 16 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:02,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:16:02,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:16:02,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:16:03,378 INFO L124 PetriNetUnfolderBase]: 1701/2816 cut-off events. [2023-11-17 12:16:03,379 INFO L125 PetriNetUnfolderBase]: For 48771/48771 co-relation queries the response was YES. [2023-11-17 12:16:03,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25574 conditions, 2816 events. 1701/2816 cut-off events. For 48771/48771 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 15940 event pairs, 124 based on Foata normal form. 40/2856 useless extension candidates. Maximal degree in co-relation 24783. Up to 1048 conditions per place. [2023-11-17 12:16:03,403 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 399 selfloop transitions, 365 changer transitions 4/768 dead transitions. [2023-11-17 12:16:03,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 768 transitions, 15085 flow [2023-11-17 12:16:03,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-17 12:16:03,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-17 12:16:03,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 340 transitions. [2023-11-17 12:16:03,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31135531135531136 [2023-11-17 12:16:03,405 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 340 transitions. [2023-11-17 12:16:03,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 340 transitions. [2023-11-17 12:16:03,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:16:03,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 340 transitions. [2023-11-17 12:16:03,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 8.717948717948717) internal successors, (340), 39 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:03,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 28.0) internal successors, (1120), 40 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:03,407 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 28.0) internal successors, (1120), 40 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:03,407 INFO L175 Difference]: Start difference. First operand has 215 places, 579 transitions, 10823 flow. Second operand 39 states and 340 transitions. [2023-11-17 12:16:03,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 768 transitions, 15085 flow [2023-11-17 12:16:03,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 768 transitions, 13393 flow, removed 797 selfloop flow, removed 8 redundant places. [2023-11-17 12:16:03,735 INFO L231 Difference]: Finished difference. Result has 252 places, 608 transitions, 11052 flow [2023-11-17 12:16:03,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=9637, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=330, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=11052, PETRI_PLACES=252, PETRI_TRANSITIONS=608} [2023-11-17 12:16:03,736 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 232 predicate places. [2023-11-17 12:16:03,736 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 608 transitions, 11052 flow [2023-11-17 12:16:03,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.9375) internal successors, (95), 16 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:03,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:16:03,736 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:16:03,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-17 12:16:03,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:03,941 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:16:03,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:16:03,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1431910947, now seen corresponding path program 13 times [2023-11-17 12:16:03,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:16:03,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249969294] [2023-11-17 12:16:03,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:16:03,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:16:03,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:04,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:04,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:16:04,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249969294] [2023-11-17 12:16:04,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249969294] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:16:04,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998916291] [2023-11-17 12:16:04,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:16:04,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:04,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:16:04,126 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:16:04,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-17 12:16:04,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:04,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:16:04,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:16:04,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:04,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:16:04,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:04,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998916291] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:16:04,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:16:04,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2023-11-17 12:16:04,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289568674] [2023-11-17 12:16:04,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:16:04,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 12:16:04,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:16:04,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 12:16:04,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2023-11-17 12:16:04,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:16:04,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 608 transitions, 11052 flow. Second operand has 22 states, 22 states have (on average 5.681818181818182) internal successors, (125), 22 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:04,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:16:04,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:16:04,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:16:06,148 INFO L124 PetriNetUnfolderBase]: 1964/3199 cut-off events. [2023-11-17 12:16:06,149 INFO L125 PetriNetUnfolderBase]: For 42005/42005 co-relation queries the response was YES. [2023-11-17 12:16:06,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28287 conditions, 3199 events. 1964/3199 cut-off events. For 42005/42005 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 18144 event pairs, 84 based on Foata normal form. 106/3305 useless extension candidates. Maximal degree in co-relation 27949. Up to 994 conditions per place. [2023-11-17 12:16:06,179 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 183 selfloop transitions, 686 changer transitions 21/890 dead transitions. [2023-11-17 12:16:06,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 890 transitions, 17165 flow [2023-11-17 12:16:06,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-17 12:16:06,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-17 12:16:06,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 402 transitions. [2023-11-17 12:16:06,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30547112462006076 [2023-11-17 12:16:06,181 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 402 transitions. [2023-11-17 12:16:06,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 402 transitions. [2023-11-17 12:16:06,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:16:06,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 402 transitions. [2023-11-17 12:16:06,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 8.553191489361701) internal successors, (402), 47 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:06,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 28.0) internal successors, (1344), 48 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:06,249 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 28.0) internal successors, (1344), 48 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:06,249 INFO L175 Difference]: Start difference. First operand has 252 places, 608 transitions, 11052 flow. Second operand 47 states and 402 transitions. [2023-11-17 12:16:06,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 890 transitions, 17165 flow [2023-11-17 12:16:06,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 890 transitions, 16666 flow, removed 136 selfloop flow, removed 14 redundant places. [2023-11-17 12:16:06,585 INFO L231 Difference]: Finished difference. Result has 290 places, 779 transitions, 15855 flow [2023-11-17 12:16:06,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=10546, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=523, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=15855, PETRI_PLACES=290, PETRI_TRANSITIONS=779} [2023-11-17 12:16:06,586 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 270 predicate places. [2023-11-17 12:16:06,586 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 779 transitions, 15855 flow [2023-11-17 12:16:06,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.681818181818182) internal successors, (125), 22 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:06,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:16:06,586 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:16:06,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-17 12:16:06,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:06,787 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:16:06,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:16:06,787 INFO L85 PathProgramCache]: Analyzing trace with hash 687208449, now seen corresponding path program 14 times [2023-11-17 12:16:06,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:16:06,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82294729] [2023-11-17 12:16:06,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:16:06,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:16:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:06,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:16:06,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82294729] [2023-11-17 12:16:06,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82294729] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:16:06,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463211724] [2023-11-17 12:16:06,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:16:06,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:06,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:16:06,883 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:16:06,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-17 12:16:06,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:16:06,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:16:06,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:16:06,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:16:06,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:06,995 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:16:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:07,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463211724] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:16:07,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:16:07,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-11-17 12:16:07,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265835830] [2023-11-17 12:16:07,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:16:07,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 12:16:07,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:16:07,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 12:16:07,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-11-17 12:16:07,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:16:07,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 779 transitions, 15855 flow. Second operand has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:07,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:16:07,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:16:07,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:16:08,797 INFO L124 PetriNetUnfolderBase]: 2002/3299 cut-off events. [2023-11-17 12:16:08,798 INFO L125 PetriNetUnfolderBase]: For 46841/46841 co-relation queries the response was YES. [2023-11-17 12:16:08,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31140 conditions, 3299 events. 2002/3299 cut-off events. For 46841/46841 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 19153 event pairs, 99 based on Foata normal form. 74/3373 useless extension candidates. Maximal degree in co-relation 30725. Up to 981 conditions per place. [2023-11-17 12:16:08,874 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 369 selfloop transitions, 513 changer transitions 14/896 dead transitions. [2023-11-17 12:16:08,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 896 transitions, 18784 flow [2023-11-17 12:16:08,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-17 12:16:08,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-17 12:16:08,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 353 transitions. [2023-11-17 12:16:08,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3074912891986063 [2023-11-17 12:16:08,876 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 353 transitions. [2023-11-17 12:16:08,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 353 transitions. [2023-11-17 12:16:08,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:16:08,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 353 transitions. [2023-11-17 12:16:08,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 8.609756097560975) internal successors, (353), 41 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:08,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 28.0) internal successors, (1176), 42 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:08,882 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 28.0) internal successors, (1176), 42 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:08,883 INFO L175 Difference]: Start difference. First operand has 290 places, 779 transitions, 15855 flow. Second operand 41 states and 353 transitions. [2023-11-17 12:16:08,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 896 transitions, 18784 flow [2023-11-17 12:16:09,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 896 transitions, 17186 flow, removed 580 selfloop flow, removed 23 redundant places. [2023-11-17 12:16:09,362 INFO L231 Difference]: Finished difference. Result has 312 places, 794 transitions, 16111 flow [2023-11-17 12:16:09,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=13944, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=466, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=16111, PETRI_PLACES=312, PETRI_TRANSITIONS=794} [2023-11-17 12:16:09,363 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 292 predicate places. [2023-11-17 12:16:09,363 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 794 transitions, 16111 flow [2023-11-17 12:16:09,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:09,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:16:09,364 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:16:09,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-17 12:16:09,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:09,568 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:16:09,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:16:09,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1792183591, now seen corresponding path program 15 times [2023-11-17 12:16:09,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:16:09,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468424065] [2023-11-17 12:16:09,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:16:09,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:16:09,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:09,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:09,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:16:09,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468424065] [2023-11-17 12:16:09,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468424065] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:16:09,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389441765] [2023-11-17 12:16:09,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:16:09,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:09,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:16:09,653 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:16:09,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-17 12:16:09,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:16:09,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:16:09,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:16:09,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:16:09,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:09,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:16:09,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:09,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389441765] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:16:09,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:16:09,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-11-17 12:16:09,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137751888] [2023-11-17 12:16:09,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:16:09,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 12:16:09,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:16:09,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 12:16:09,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-11-17 12:16:09,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:16:09,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 794 transitions, 16111 flow. Second operand has 16 states, 16 states have (on average 5.6875) internal successors, (91), 16 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:09,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:16:09,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:16:09,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:16:11,500 INFO L124 PetriNetUnfolderBase]: 2348/3891 cut-off events. [2023-11-17 12:16:11,500 INFO L125 PetriNetUnfolderBase]: For 59674/59674 co-relation queries the response was YES. [2023-11-17 12:16:11,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36697 conditions, 3891 events. 2348/3891 cut-off events. For 59674/59674 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 23340 event pairs, 400 based on Foata normal form. 22/3913 useless extension candidates. Maximal degree in co-relation 36313. Up to 2748 conditions per place. [2023-11-17 12:16:11,531 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 765 selfloop transitions, 280 changer transitions 0/1045 dead transitions. [2023-11-17 12:16:11,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 1045 transitions, 22404 flow [2023-11-17 12:16:11,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-17 12:16:11,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-17 12:16:11,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 349 transitions. [2023-11-17 12:16:11,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31160714285714286 [2023-11-17 12:16:11,533 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 349 transitions. [2023-11-17 12:16:11,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 349 transitions. [2023-11-17 12:16:11,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:16:11,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 349 transitions. [2023-11-17 12:16:11,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 8.725) internal successors, (349), 40 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 12:16:11,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 28.0) internal successors, (1148), 41 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:11,535 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 28.0) internal successors, (1148), 41 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:11,535 INFO L175 Difference]: Start difference. First operand has 312 places, 794 transitions, 16111 flow. Second operand 40 states and 349 transitions. [2023-11-17 12:16:11,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 1045 transitions, 22404 flow [2023-11-17 12:16:12,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 1045 transitions, 21967 flow, removed 155 selfloop flow, removed 14 redundant places. [2023-11-17 12:16:12,142 INFO L231 Difference]: Finished difference. Result has 348 places, 894 transitions, 18931 flow [2023-11-17 12:16:12,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=15796, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=18931, PETRI_PLACES=348, PETRI_TRANSITIONS=894} [2023-11-17 12:16:12,142 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 328 predicate places. [2023-11-17 12:16:12,142 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 894 transitions, 18931 flow [2023-11-17 12:16:12,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.6875) internal successors, (91), 16 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:12,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:16:12,143 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:16:12,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-17 12:16:12,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:12,345 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:16:12,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:16:12,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1110285391, now seen corresponding path program 16 times [2023-11-17 12:16:12,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:16:12,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208448515] [2023-11-17 12:16:12,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:16:12,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:16:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:12,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:12,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:16:12,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208448515] [2023-11-17 12:16:12,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208448515] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:16:12,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128433806] [2023-11-17 12:16:12,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:16:12,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:12,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:16:12,501 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:16:12,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-17 12:16:12,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:16:12,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:16:12,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:16:12,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:16:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:12,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:16:12,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:12,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128433806] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:16:12,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:16:12,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2023-11-17 12:16:12,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019510639] [2023-11-17 12:16:12,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:16:12,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 12:16:12,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:16:12,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 12:16:12,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2023-11-17 12:16:12,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:16:12,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 894 transitions, 18931 flow. Second operand has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 22 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:12,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:16:12,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:16:12,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:16:14,843 INFO L124 PetriNetUnfolderBase]: 2592/4251 cut-off events. [2023-11-17 12:16:14,843 INFO L125 PetriNetUnfolderBase]: For 67715/67715 co-relation queries the response was YES. [2023-11-17 12:16:14,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41169 conditions, 4251 events. 2592/4251 cut-off events. For 67715/67715 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 25684 event pairs, 251 based on Foata normal form. 28/4279 useless extension candidates. Maximal degree in co-relation 40689. Up to 1939 conditions per place. [2023-11-17 12:16:14,888 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 331 selfloop transitions, 741 changer transitions 10/1082 dead transitions. [2023-11-17 12:16:14,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 1082 transitions, 23931 flow [2023-11-17 12:16:14,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-17 12:16:14,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-17 12:16:14,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 316 transitions. [2023-11-17 12:16:14,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29699248120300753 [2023-11-17 12:16:14,890 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 316 transitions. [2023-11-17 12:16:14,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 316 transitions. [2023-11-17 12:16:14,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:16:14,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 316 transitions. [2023-11-17 12:16:14,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 8.31578947368421) internal successors, (316), 38 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:14,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 28.0) internal successors, (1092), 39 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:14,900 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 28.0) internal successors, (1092), 39 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:14,900 INFO L175 Difference]: Start difference. First operand has 348 places, 894 transitions, 18931 flow. Second operand 38 states and 316 transitions. [2023-11-17 12:16:14,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 1082 transitions, 23931 flow [2023-11-17 12:16:15,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 1082 transitions, 23461 flow, removed 169 selfloop flow, removed 14 redundant places. [2023-11-17 12:16:15,689 INFO L231 Difference]: Finished difference. Result has 379 places, 1009 transitions, 23116 flow [2023-11-17 12:16:15,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=18441, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=893, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=626, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=23116, PETRI_PLACES=379, PETRI_TRANSITIONS=1009} [2023-11-17 12:16:15,690 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 359 predicate places. [2023-11-17 12:16:15,690 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 1009 transitions, 23116 flow [2023-11-17 12:16:15,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 22 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:15,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:16:15,690 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:16:15,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-17 12:16:15,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:15,894 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:16:15,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:16:15,895 INFO L85 PathProgramCache]: Analyzing trace with hash -517200679, now seen corresponding path program 17 times [2023-11-17 12:16:15,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:16:15,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098172761] [2023-11-17 12:16:15,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:16:15,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:16:15,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:15,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:15,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:16:15,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098172761] [2023-11-17 12:16:15,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098172761] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:16:15,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038464993] [2023-11-17 12:16:15,979 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:16:15,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:15,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:16:15,980 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:16:15,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-17 12:16:16,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:16:16,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:16:16,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:16:16,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:16:16,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:16,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:16:16,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:16,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038464993] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:16:16,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:16:16,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-17 12:16:16,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555868313] [2023-11-17 12:16:16,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:16:16,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:16:16,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:16:16,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:16:16,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:16:16,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:16:16,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 1009 transitions, 23116 flow. Second operand has 18 states, 18 states have (on average 5.833333333333333) internal successors, (105), 18 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:16,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:16:16,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:16:16,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:16:18,854 INFO L124 PetriNetUnfolderBase]: 2865/4740 cut-off events. [2023-11-17 12:16:18,854 INFO L125 PetriNetUnfolderBase]: For 90503/90503 co-relation queries the response was YES. [2023-11-17 12:16:18,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48940 conditions, 4740 events. 2865/4740 cut-off events. For 90503/90503 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 29639 event pairs, 451 based on Foata normal form. 42/4782 useless extension candidates. Maximal degree in co-relation 48403. Up to 3299 conditions per place. [2023-11-17 12:16:18,902 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 802 selfloop transitions, 403 changer transitions 13/1218 dead transitions. [2023-11-17 12:16:18,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 1218 transitions, 29301 flow [2023-11-17 12:16:18,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-17 12:16:18,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-17 12:16:18,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 359 transitions. [2023-11-17 12:16:18,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2913961038961039 [2023-11-17 12:16:18,903 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 359 transitions. [2023-11-17 12:16:18,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 359 transitions. [2023-11-17 12:16:18,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:16:18,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 359 transitions. [2023-11-17 12:16:18,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 8.159090909090908) internal successors, (359), 44 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:18,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 28.0) internal successors, (1260), 45 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:18,945 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 28.0) internal successors, (1260), 45 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:18,945 INFO L175 Difference]: Start difference. First operand has 379 places, 1009 transitions, 23116 flow. Second operand 44 states and 359 transitions. [2023-11-17 12:16:18,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 1218 transitions, 29301 flow [2023-11-17 12:16:19,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 1218 transitions, 28703 flow, removed 84 selfloop flow, removed 17 redundant places. [2023-11-17 12:16:19,979 INFO L231 Difference]: Finished difference. Result has 415 places, 1089 transitions, 25964 flow [2023-11-17 12:16:19,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=22442, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1003, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=634, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=25964, PETRI_PLACES=415, PETRI_TRANSITIONS=1089} [2023-11-17 12:16:19,980 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 395 predicate places. [2023-11-17 12:16:19,980 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 1089 transitions, 25964 flow [2023-11-17 12:16:19,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.833333333333333) internal successors, (105), 18 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:19,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:16:19,980 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:16:19,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-17 12:16:20,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-17 12:16:20,185 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:16:20,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:16:20,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1398249883, now seen corresponding path program 18 times [2023-11-17 12:16:20,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:16:20,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645773090] [2023-11-17 12:16:20,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:16:20,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:16:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:20,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:20,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:16:20,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645773090] [2023-11-17 12:16:20,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645773090] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:16:20,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199394222] [2023-11-17 12:16:20,281 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:16:20,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:20,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:16:20,282 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:16:20,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-17 12:16:20,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:16:20,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:16:20,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:16:20,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:16:20,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:20,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:16:20,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:20,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199394222] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:16:20,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:16:20,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-11-17 12:16:20,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131777448] [2023-11-17 12:16:20,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:16:20,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 12:16:20,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:16:20,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 12:16:20,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-11-17 12:16:20,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:16:20,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 1089 transitions, 25964 flow. Second operand has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:20,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:16:20,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:16:20,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:16:24,475 INFO L124 PetriNetUnfolderBase]: 3025/5006 cut-off events. [2023-11-17 12:16:24,475 INFO L125 PetriNetUnfolderBase]: For 97185/97185 co-relation queries the response was YES. [2023-11-17 12:16:24,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52802 conditions, 5006 events. 3025/5006 cut-off events. For 97185/97185 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 31361 event pairs, 695 based on Foata normal form. 28/5034 useless extension candidates. Maximal degree in co-relation 52231. Up to 4117 conditions per place. [2023-11-17 12:16:24,531 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 962 selfloop transitions, 262 changer transitions 16/1240 dead transitions. [2023-11-17 12:16:24,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 1240 transitions, 30885 flow [2023-11-17 12:16:24,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-17 12:16:24,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-17 12:16:24,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 278 transitions. [2023-11-17 12:16:24,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3008658008658009 [2023-11-17 12:16:24,532 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 278 transitions. [2023-11-17 12:16:24,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 278 transitions. [2023-11-17 12:16:24,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:16:24,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 278 transitions. [2023-11-17 12:16:24,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 8.424242424242424) internal successors, (278), 33 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:24,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 28.0) internal successors, (952), 34 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:24,533 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 28.0) internal successors, (952), 34 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:24,534 INFO L175 Difference]: Start difference. First operand has 415 places, 1089 transitions, 25964 flow. Second operand 33 states and 278 transitions. [2023-11-17 12:16:24,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 1240 transitions, 30885 flow [2023-11-17 12:16:25,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 1240 transitions, 30421 flow, removed 166 selfloop flow, removed 17 redundant places. [2023-11-17 12:16:25,828 INFO L231 Difference]: Finished difference. Result has 442 places, 1154 transitions, 28021 flow [2023-11-17 12:16:25,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=25387, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1083, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=843, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=28021, PETRI_PLACES=442, PETRI_TRANSITIONS=1154} [2023-11-17 12:16:25,830 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 422 predicate places. [2023-11-17 12:16:25,830 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 1154 transitions, 28021 flow [2023-11-17 12:16:25,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:25,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:16:25,830 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:16:25,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-17 12:16:26,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-17 12:16:26,035 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:16:26,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:16:26,035 INFO L85 PathProgramCache]: Analyzing trace with hash 766033379, now seen corresponding path program 19 times [2023-11-17 12:16:26,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:16:26,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261561322] [2023-11-17 12:16:26,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:16:26,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:16:26,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:26,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:26,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:16:26,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261561322] [2023-11-17 12:16:26,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261561322] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:16:26,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523796348] [2023-11-17 12:16:26,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:16:26,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:26,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:16:26,131 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:16:26,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-17 12:16:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:26,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:16:26,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:16:26,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:26,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:16:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:26,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523796348] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:16:26,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:16:26,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-11-17 12:16:26,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926473365] [2023-11-17 12:16:26,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:16:26,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 12:16:26,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:16:26,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 12:16:26,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-11-17 12:16:26,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:16:26,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 1154 transitions, 28021 flow. Second operand has 16 states, 16 states have (on average 5.9375) internal successors, (95), 16 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:26,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:16:26,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:16:26,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:16:28,903 INFO L124 PetriNetUnfolderBase]: 3262/5431 cut-off events. [2023-11-17 12:16:28,903 INFO L125 PetriNetUnfolderBase]: For 116708/116708 co-relation queries the response was YES. [2023-11-17 12:16:28,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58741 conditions, 5431 events. 3262/5431 cut-off events. For 116708/116708 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 34887 event pairs, 759 based on Foata normal form. 28/5459 useless extension candidates. Maximal degree in co-relation 58335. Up to 4571 conditions per place. [2023-11-17 12:16:28,974 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 1151 selfloop transitions, 205 changer transitions 5/1361 dead transitions. [2023-11-17 12:16:28,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 1361 transitions, 34928 flow [2023-11-17 12:16:28,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-17 12:16:28,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-17 12:16:28,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 317 transitions. [2023-11-17 12:16:28,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.305984555984556 [2023-11-17 12:16:28,975 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 317 transitions. [2023-11-17 12:16:28,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 317 transitions. [2023-11-17 12:16:28,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:16:28,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 317 transitions. [2023-11-17 12:16:28,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 8.567567567567568) internal successors, (317), 37 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:28,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 28.0) internal successors, (1064), 38 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 12:16:28,977 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 28.0) internal successors, (1064), 38 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 12:16:28,977 INFO L175 Difference]: Start difference. First operand has 442 places, 1154 transitions, 28021 flow. Second operand 37 states and 317 transitions. [2023-11-17 12:16:28,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 1361 transitions, 34928 flow [2023-11-17 12:16:30,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 1361 transitions, 33967 flow, removed 321 selfloop flow, removed 21 redundant places. [2023-11-17 12:16:30,706 INFO L231 Difference]: Finished difference. Result has 465 places, 1232 transitions, 30119 flow [2023-11-17 12:16:30,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=27387, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=989, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=30119, PETRI_PLACES=465, PETRI_TRANSITIONS=1232} [2023-11-17 12:16:30,708 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 445 predicate places. [2023-11-17 12:16:30,708 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 1232 transitions, 30119 flow [2023-11-17 12:16:30,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.9375) internal successors, (95), 16 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:30,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:16:30,708 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:16:30,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-17 12:16:30,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-17 12:16:30,908 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:16:30,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:16:30,909 INFO L85 PathProgramCache]: Analyzing trace with hash 396030955, now seen corresponding path program 20 times [2023-11-17 12:16:30,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:16:30,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585477795] [2023-11-17 12:16:30,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:16:30,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:16:30,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:31,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:31,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:16:31,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585477795] [2023-11-17 12:16:31,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585477795] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:16:31,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291151647] [2023-11-17 12:16:31,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:16:31,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:31,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:16:31,051 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:16:31,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-17 12:16:31,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:16:31,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:16:31,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:16:31,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:16:31,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:31,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:16:31,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:31,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291151647] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:16:31,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:16:31,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2023-11-17 12:16:31,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071986147] [2023-11-17 12:16:31,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:16:31,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:16:31,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:16:31,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:16:31,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:16:31,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:16:31,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 1232 transitions, 30119 flow. Second operand has 21 states, 21 states have (on average 5.571428571428571) internal successors, (117), 21 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:31,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:16:31,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:16:31,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:16:33,993 INFO L124 PetriNetUnfolderBase]: 3492/5777 cut-off events. [2023-11-17 12:16:33,994 INFO L125 PetriNetUnfolderBase]: For 123150/123150 co-relation queries the response was YES. [2023-11-17 12:16:34,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62677 conditions, 5777 events. 3492/5777 cut-off events. For 123150/123150 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 37153 event pairs, 577 based on Foata normal form. 24/5801 useless extension candidates. Maximal degree in co-relation 62065. Up to 3865 conditions per place. [2023-11-17 12:16:34,055 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 706 selfloop transitions, 727 changer transitions 16/1449 dead transitions. [2023-11-17 12:16:34,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 1449 transitions, 37358 flow [2023-11-17 12:16:34,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-17 12:16:34,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-17 12:16:34,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 260 transitions. [2023-11-17 12:16:34,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2995391705069124 [2023-11-17 12:16:34,057 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 260 transitions. [2023-11-17 12:16:34,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 260 transitions. [2023-11-17 12:16:34,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:16:34,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 260 transitions. [2023-11-17 12:16:34,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 8.387096774193548) internal successors, (260), 31 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:34,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 28.0) internal successors, (896), 32 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:34,058 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 28.0) internal successors, (896), 32 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:34,058 INFO L175 Difference]: Start difference. First operand has 465 places, 1232 transitions, 30119 flow. Second operand 31 states and 260 transitions. [2023-11-17 12:16:34,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 1449 transitions, 37358 flow [2023-11-17 12:16:35,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 1449 transitions, 36697 flow, removed 270 selfloop flow, removed 17 redundant places. [2023-11-17 12:16:35,827 INFO L231 Difference]: Finished difference. Result has 484 places, 1388 transitions, 35748 flow [2023-11-17 12:16:35,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=29458, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=582, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=35748, PETRI_PLACES=484, PETRI_TRANSITIONS=1388} [2023-11-17 12:16:35,829 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 464 predicate places. [2023-11-17 12:16:35,829 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 1388 transitions, 35748 flow [2023-11-17 12:16:35,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.571428571428571) internal successors, (117), 21 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:35,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:16:35,829 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:16:35,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-17 12:16:36,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:36,034 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:16:36,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:16:36,034 INFO L85 PathProgramCache]: Analyzing trace with hash 512581571, now seen corresponding path program 21 times [2023-11-17 12:16:36,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:16:36,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166084042] [2023-11-17 12:16:36,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:16:36,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:16:36,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:36,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:36,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:16:36,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166084042] [2023-11-17 12:16:36,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166084042] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:16:36,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140321595] [2023-11-17 12:16:36,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:16:36,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:36,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:16:36,132 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:16:36,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-17 12:16:36,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:16:36,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:16:36,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:16:36,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:16:36,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:36,241 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:16:36,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:36,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140321595] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:16:36,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:16:36,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-11-17 12:16:36,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825631545] [2023-11-17 12:16:36,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:16:36,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 12:16:36,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:16:36,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 12:16:36,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-11-17 12:16:36,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:16:36,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 1388 transitions, 35748 flow. Second operand has 16 states, 16 states have (on average 5.6875) internal successors, (91), 16 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:36,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:16:36,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:16:36,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:16:39,219 INFO L124 PetriNetUnfolderBase]: 3608/5956 cut-off events. [2023-11-17 12:16:39,219 INFO L125 PetriNetUnfolderBase]: For 139913/139913 co-relation queries the response was YES. [2023-11-17 12:16:39,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68493 conditions, 5956 events. 3608/5956 cut-off events. For 139913/139913 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 38419 event pairs, 898 based on Foata normal form. 58/6014 useless extension candidates. Maximal degree in co-relation 67927. Up to 5363 conditions per place. [2023-11-17 12:16:39,301 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 1388 selfloop transitions, 154 changer transitions 2/1544 dead transitions. [2023-11-17 12:16:39,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 1544 transitions, 41707 flow [2023-11-17 12:16:39,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-17 12:16:39,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-17 12:16:39,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 320 transitions. [2023-11-17 12:16:39,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3088803088803089 [2023-11-17 12:16:39,302 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 320 transitions. [2023-11-17 12:16:39,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 320 transitions. [2023-11-17 12:16:39,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:16:39,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 320 transitions. [2023-11-17 12:16:39,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 8.64864864864865) internal successors, (320), 37 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:39,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 28.0) internal successors, (1064), 38 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 12:16:39,304 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 28.0) internal successors, (1064), 38 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 12:16:39,304 INFO L175 Difference]: Start difference. First operand has 484 places, 1388 transitions, 35748 flow. Second operand 37 states and 320 transitions. [2023-11-17 12:16:39,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 1544 transitions, 41707 flow [2023-11-17 12:16:41,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 1544 transitions, 40397 flow, removed 606 selfloop flow, removed 9 redundant places. [2023-11-17 12:16:41,532 INFO L231 Difference]: Finished difference. Result has 521 places, 1437 transitions, 36440 flow [2023-11-17 12:16:41,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=34926, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=36440, PETRI_PLACES=521, PETRI_TRANSITIONS=1437} [2023-11-17 12:16:41,533 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 501 predicate places. [2023-11-17 12:16:41,533 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 1437 transitions, 36440 flow [2023-11-17 12:16:41,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.6875) internal successors, (91), 16 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:41,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:16:41,533 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:16:41,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-17 12:16:41,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-17 12:16:41,737 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:16:41,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:16:41,737 INFO L85 PathProgramCache]: Analyzing trace with hash 26614779, now seen corresponding path program 22 times [2023-11-17 12:16:41,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:16:41,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767958951] [2023-11-17 12:16:41,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:16:41,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:16:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:41,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:16:41,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767958951] [2023-11-17 12:16:41,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767958951] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:16:41,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711719655] [2023-11-17 12:16:41,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:16:41,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:41,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:16:41,887 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:16:41,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-17 12:16:41,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:16:41,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:16:41,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:16:41,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:16:42,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:42,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:16:42,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:42,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711719655] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:16:42,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:16:42,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2023-11-17 12:16:42,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304230852] [2023-11-17 12:16:42,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:16:42,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:16:42,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:16:42,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:16:42,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:16:42,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:16:42,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 1437 transitions, 36440 flow. Second operand has 21 states, 21 states have (on average 5.761904761904762) internal successors, (121), 21 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:42,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:16:42,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:16:42,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:16:45,875 INFO L124 PetriNetUnfolderBase]: 3651/6061 cut-off events. [2023-11-17 12:16:45,875 INFO L125 PetriNetUnfolderBase]: For 158193/158193 co-relation queries the response was YES. [2023-11-17 12:16:45,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69159 conditions, 6061 events. 3651/6061 cut-off events. For 158193/158193 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 39507 event pairs, 452 based on Foata normal form. 46/6107 useless extension candidates. Maximal degree in co-relation 68583. Up to 3381 conditions per place. [2023-11-17 12:16:45,953 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 642 selfloop transitions, 873 changer transitions 3/1518 dead transitions. [2023-11-17 12:16:45,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 1518 transitions, 40577 flow [2023-11-17 12:16:45,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-17 12:16:45,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-17 12:16:45,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 315 transitions. [2023-11-17 12:16:45,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30405405405405406 [2023-11-17 12:16:45,954 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 315 transitions. [2023-11-17 12:16:45,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 315 transitions. [2023-11-17 12:16:45,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:16:45,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 315 transitions. [2023-11-17 12:16:45,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 8.513513513513514) internal successors, (315), 37 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:45,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 28.0) internal successors, (1064), 38 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 12:16:45,956 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 28.0) internal successors, (1064), 38 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 12:16:45,956 INFO L175 Difference]: Start difference. First operand has 521 places, 1437 transitions, 36440 flow. Second operand 37 states and 315 transitions. [2023-11-17 12:16:45,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 557 places, 1518 transitions, 40577 flow [2023-11-17 12:16:48,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 1518 transitions, 39505 flow, removed 430 selfloop flow, removed 23 redundant places. [2023-11-17 12:16:48,281 INFO L231 Difference]: Finished difference. Result has 536 places, 1455 transitions, 37903 flow [2023-11-17 12:16:48,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=35442, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=848, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=37903, PETRI_PLACES=536, PETRI_TRANSITIONS=1455} [2023-11-17 12:16:48,283 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 516 predicate places. [2023-11-17 12:16:48,283 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 1455 transitions, 37903 flow [2023-11-17 12:16:48,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.761904761904762) internal successors, (121), 21 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:48,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:16:48,283 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:16:48,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-17 12:16:48,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-17 12:16:48,485 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:16:48,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:16:48,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1450433053, now seen corresponding path program 23 times [2023-11-17 12:16:48,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:16:48,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462924795] [2023-11-17 12:16:48,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:16:48,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:16:48,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:48,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:48,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:16:48,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462924795] [2023-11-17 12:16:48,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462924795] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:16:48,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23936783] [2023-11-17 12:16:48,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:16:48,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:48,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:16:48,560 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:16:48,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-17 12:16:48,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:16:48,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:16:48,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:16:48,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:16:48,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:48,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:16:48,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:48,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23936783] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:16:48,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:16:48,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-11-17 12:16:48,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522572162] [2023-11-17 12:16:48,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:16:48,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 12:16:48,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:16:48,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 12:16:48,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-11-17 12:16:48,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:16:48,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 1455 transitions, 37903 flow. Second operand has 17 states, 17 states have (on average 5.823529411764706) internal successors, (99), 17 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:48,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:16:48,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:16:48,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:16:52,384 INFO L124 PetriNetUnfolderBase]: 3929/6547 cut-off events. [2023-11-17 12:16:52,385 INFO L125 PetriNetUnfolderBase]: For 164710/164710 co-relation queries the response was YES. [2023-11-17 12:16:52,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75934 conditions, 6547 events. 3929/6547 cut-off events. For 164710/164710 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 43326 event pairs, 718 based on Foata normal form. 26/6573 useless extension candidates. Maximal degree in co-relation 75305. Up to 4643 conditions per place. [2023-11-17 12:16:52,497 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 1115 selfloop transitions, 515 changer transitions 12/1642 dead transitions. [2023-11-17 12:16:52,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 572 places, 1642 transitions, 45028 flow [2023-11-17 12:16:52,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-17 12:16:52,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-17 12:16:52,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 307 transitions. [2023-11-17 12:16:52,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29633204633204635 [2023-11-17 12:16:52,498 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 307 transitions. [2023-11-17 12:16:52,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 307 transitions. [2023-11-17 12:16:52,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:16:52,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 307 transitions. [2023-11-17 12:16:52,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 8.297297297297296) internal successors, (307), 37 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:52,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 28.0) internal successors, (1064), 38 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 12:16:52,500 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 28.0) internal successors, (1064), 38 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 12:16:52,500 INFO L175 Difference]: Start difference. First operand has 536 places, 1455 transitions, 37903 flow. Second operand 37 states and 307 transitions. [2023-11-17 12:16:52,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 572 places, 1642 transitions, 45028 flow [2023-11-17 12:16:54,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 551 places, 1642 transitions, 43897 flow, removed 127 selfloop flow, removed 21 redundant places. [2023-11-17 12:16:54,899 INFO L231 Difference]: Finished difference. Result has 563 places, 1563 transitions, 41750 flow [2023-11-17 12:16:54,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=36843, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=419, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=966, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=41750, PETRI_PLACES=563, PETRI_TRANSITIONS=1563} [2023-11-17 12:16:54,900 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 543 predicate places. [2023-11-17 12:16:54,900 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 1563 transitions, 41750 flow [2023-11-17 12:16:54,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.823529411764706) internal successors, (99), 17 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:54,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:16:54,900 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:16:54,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-17 12:16:55,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:55,101 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:16:55,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:16:55,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1579734063, now seen corresponding path program 24 times [2023-11-17 12:16:55,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:16:55,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131368763] [2023-11-17 12:16:55,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:16:55,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:16:55,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:55,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:55,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:16:55,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131368763] [2023-11-17 12:16:55,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131368763] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:16:55,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652737775] [2023-11-17 12:16:55,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:16:55,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:55,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:16:55,171 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:16:55,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-17 12:16:55,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 12:16:55,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:16:55,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-17 12:16:55,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:16:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:16:55,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:16:55,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:16:55,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652737775] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:16:55,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:16:55,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2023-11-17 12:16:55,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141170582] [2023-11-17 12:16:55,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:16:55,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 12:16:55,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:16:55,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 12:16:55,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-17 12:16:55,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2023-11-17 12:16:55,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 1563 transitions, 41750 flow. Second operand has 11 states, 11 states have (on average 9.090909090909092) internal successors, (100), 11 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:55,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:16:55,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2023-11-17 12:16:55,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:16:59,216 INFO L124 PetriNetUnfolderBase]: 5218/8803 cut-off events. [2023-11-17 12:16:59,217 INFO L125 PetriNetUnfolderBase]: For 242582/242582 co-relation queries the response was YES. [2023-11-17 12:16:59,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103565 conditions, 8803 events. 5218/8803 cut-off events. For 242582/242582 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 62564 event pairs, 192 based on Foata normal form. 31/8834 useless extension candidates. Maximal degree in co-relation 102822. Up to 4697 conditions per place. [2023-11-17 12:16:59,336 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 1326 selfloop transitions, 738 changer transitions 128/2192 dead transitions. [2023-11-17 12:16:59,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 2192 transitions, 62102 flow [2023-11-17 12:16:59,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:16:59,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:16:59,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2023-11-17 12:16:59,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2023-11-17 12:16:59,337 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 93 transitions. [2023-11-17 12:16:59,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 93 transitions. [2023-11-17 12:16:59,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:16:59,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 93 transitions. [2023-11-17 12:16:59,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:59,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 28.0) internal successors, (196), 7 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:59,337 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 28.0) internal successors, (196), 7 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:59,337 INFO L175 Difference]: Start difference. First operand has 563 places, 1563 transitions, 41750 flow. Second operand 6 states and 93 transitions. [2023-11-17 12:16:59,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 2192 transitions, 62102 flow [2023-11-17 12:17:03,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 2192 transitions, 61390 flow, removed 175 selfloop flow, removed 24 redundant places. [2023-11-17 12:17:03,883 INFO L231 Difference]: Finished difference. Result has 548 places, 1836 transitions, 51429 flow [2023-11-17 12:17:03,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=41250, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=443, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=843, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=51429, PETRI_PLACES=548, PETRI_TRANSITIONS=1836} [2023-11-17 12:17:03,885 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 528 predicate places. [2023-11-17 12:17:03,885 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 1836 transitions, 51429 flow [2023-11-17 12:17:03,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.090909090909092) internal successors, (100), 11 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:03,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:17:03,885 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:17:03,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-17 12:17:04,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:17:04,090 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:17:04,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:17:04,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1271776976, now seen corresponding path program 25 times [2023-11-17 12:17:04,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:17:04,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400396350] [2023-11-17 12:17:04,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:17:04,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:17:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:17:04,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:17:04,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:17:04,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400396350] [2023-11-17 12:17:04,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400396350] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:17:04,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753777380] [2023-11-17 12:17:04,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:17:04,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:17:04,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:17:04,211 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:17:04,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-17 12:17:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:17:04,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 12:17:04,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:17:04,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:17:04,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:17:04,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:17:04,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753777380] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:17:04,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:17:04,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2023-11-17 12:17:04,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196349563] [2023-11-17 12:17:04,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:17:04,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:17:04,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:17:04,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:17:04,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2023-11-17 12:17:04,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:17:04,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 1836 transitions, 51429 flow. Second operand has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:04,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:17:04,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:17:04,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:17:11,267 INFO L124 PetriNetUnfolderBase]: 7600/12197 cut-off events. [2023-11-17 12:17:11,267 INFO L125 PetriNetUnfolderBase]: For 350655/350655 co-relation queries the response was YES. [2023-11-17 12:17:11,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155290 conditions, 12197 events. 7600/12197 cut-off events. For 350655/350655 co-relation queries the response was YES. Maximal size of possible extension queue 894. Compared 84446 event pairs, 157 based on Foata normal form. 52/12249 useless extension candidates. Maximal degree in co-relation 154204. Up to 4971 conditions per place. [2023-11-17 12:17:11,428 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 1730 selfloop transitions, 1383 changer transitions 17/3130 dead transitions. [2023-11-17 12:17:11,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 578 places, 3130 transitions, 92646 flow [2023-11-17 12:17:11,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-17 12:17:11,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-17 12:17:11,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 282 transitions. [2023-11-17 12:17:11,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3248847926267281 [2023-11-17 12:17:11,429 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 282 transitions. [2023-11-17 12:17:11,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 282 transitions. [2023-11-17 12:17:11,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:17:11,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 282 transitions. [2023-11-17 12:17:11,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 9.096774193548388) internal successors, (282), 31 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:11,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 28.0) internal successors, (896), 32 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:11,431 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 28.0) internal successors, (896), 32 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:11,431 INFO L175 Difference]: Start difference. First operand has 548 places, 1836 transitions, 51429 flow. Second operand 31 states and 282 transitions. [2023-11-17 12:17:11,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 578 places, 3130 transitions, 92646 flow [2023-11-17 12:17:18,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 3130 transitions, 91490 flow, removed 482 selfloop flow, removed 2 redundant places. [2023-11-17 12:17:18,978 INFO L231 Difference]: Finished difference. Result has 588 places, 2608 transitions, 76748 flow [2023-11-17 12:17:18,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=50677, PETRI_DIFFERENCE_MINUEND_PLACES=546, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1835, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=721, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1015, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=76748, PETRI_PLACES=588, PETRI_TRANSITIONS=2608} [2023-11-17 12:17:18,980 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 568 predicate places. [2023-11-17 12:17:18,980 INFO L495 AbstractCegarLoop]: Abstraction has has 588 places, 2608 transitions, 76748 flow [2023-11-17 12:17:18,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:18,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:17:18,980 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:17:18,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-17 12:17:19,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:17:19,184 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:17:19,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:17:19,184 INFO L85 PathProgramCache]: Analyzing trace with hash -424219676, now seen corresponding path program 26 times [2023-11-17 12:17:19,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:17:19,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590649586] [2023-11-17 12:17:19,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:17:19,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:17:19,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:17:19,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:17:19,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:17:19,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590649586] [2023-11-17 12:17:19,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590649586] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:17:19,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941596462] [2023-11-17 12:17:19,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:17:19,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:17:19,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:17:19,315 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:17:19,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-17 12:17:19,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:17:19,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:17:19,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 12:17:19,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:17:19,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:17:19,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:17:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:17:19,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941596462] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:17:19,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:17:19,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-11-17 12:17:19,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508297386] [2023-11-17 12:17:19,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:17:19,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:17:19,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:17:19,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:17:19,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2023-11-17 12:17:19,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:17:19,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 588 places, 2608 transitions, 76748 flow. Second operand has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 23 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:19,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:17:19,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:17:19,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:17:28,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-17 12:17:33,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-17 12:17:54,232 INFO L124 PetriNetUnfolderBase]: 8312/13191 cut-off events. [2023-11-17 12:17:54,233 INFO L125 PetriNetUnfolderBase]: For 403436/403436 co-relation queries the response was YES. [2023-11-17 12:17:54,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173821 conditions, 13191 events. 8312/13191 cut-off events. For 403436/403436 co-relation queries the response was YES. Maximal size of possible extension queue 928. Compared 91267 event pairs, 643 based on Foata normal form. 68/13259 useless extension candidates. Maximal degree in co-relation 172633. Up to 5717 conditions per place. [2023-11-17 12:17:54,427 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 765 selfloop transitions, 2799 changer transitions 62/3626 dead transitions. [2023-11-17 12:17:54,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 657 places, 3626 transitions, 110297 flow [2023-11-17 12:17:54,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-11-17 12:17:54,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2023-11-17 12:17:54,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 593 transitions. [2023-11-17 12:17:54,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3025510204081633 [2023-11-17 12:17:54,428 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 593 transitions. [2023-11-17 12:17:54,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 593 transitions. [2023-11-17 12:17:54,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:17:54,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 593 transitions. [2023-11-17 12:17:54,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 8.471428571428572) internal successors, (593), 70 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:54,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 28.0) internal successors, (1988), 71 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:54,431 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 28.0) internal successors, (1988), 71 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:54,431 INFO L175 Difference]: Start difference. First operand has 588 places, 2608 transitions, 76748 flow. Second operand 70 states and 593 transitions. [2023-11-17 12:17:54,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 657 places, 3626 transitions, 110297 flow [2023-11-17 12:18:03,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 644 places, 3626 transitions, 108085 flow, removed 937 selfloop flow, removed 13 redundant places. [2023-11-17 12:18:03,738 INFO L231 Difference]: Finished difference. Result has 652 places, 3376 transitions, 103775 flow [2023-11-17 12:18:03,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=74838, PETRI_DIFFERENCE_MINUEND_PLACES=575, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2043, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=103775, PETRI_PLACES=652, PETRI_TRANSITIONS=3376} [2023-11-17 12:18:03,740 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 632 predicate places. [2023-11-17 12:18:03,740 INFO L495 AbstractCegarLoop]: Abstraction has has 652 places, 3376 transitions, 103775 flow [2023-11-17 12:18:03,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 23 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:03,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:18:03,740 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:18:03,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-17 12:18:03,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:18:03,945 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:18:03,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:18:03,945 INFO L85 PathProgramCache]: Analyzing trace with hash -2106762626, now seen corresponding path program 27 times [2023-11-17 12:18:03,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:18:03,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977663338] [2023-11-17 12:18:03,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:18:03,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:18:03,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:18:04,052 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:18:04,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:18:04,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977663338] [2023-11-17 12:18:04,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977663338] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:18:04,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577301215] [2023-11-17 12:18:04,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:18:04,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:18:04,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:18:04,057 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:18:04,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-17 12:18:04,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-17 12:18:04,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:18:04,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 12:18:04,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:18:04,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:18:04,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:18:04,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:18:04,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577301215] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:18:04,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:18:04,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-11-17 12:18:04,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324092195] [2023-11-17 12:18:04,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:18:04,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 12:18:04,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:18:04,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 12:18:04,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2023-11-17 12:18:04,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:18:04,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 652 places, 3376 transitions, 103775 flow. Second operand has 22 states, 22 states have (on average 5.681818181818182) internal successors, (125), 22 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:04,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:18:04,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:18:04,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:18:22,021 INFO L124 PetriNetUnfolderBase]: 9814/15413 cut-off events. [2023-11-17 12:18:22,021 INFO L125 PetriNetUnfolderBase]: For 466957/466957 co-relation queries the response was YES. [2023-11-17 12:18:22,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210068 conditions, 15413 events. 9814/15413 cut-off events. For 466957/466957 co-relation queries the response was YES. Maximal size of possible extension queue 1043. Compared 106892 event pairs, 337 based on Foata normal form. 268/15681 useless extension candidates. Maximal degree in co-relation 209053. Up to 5701 conditions per place. [2023-11-17 12:18:22,270 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 1347 selfloop transitions, 3022 changer transitions 71/4440 dead transitions. [2023-11-17 12:18:22,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 731 places, 4440 transitions, 140385 flow [2023-11-17 12:18:22,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-11-17 12:18:22,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2023-11-17 12:18:22,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 687 transitions. [2023-11-17 12:18:22,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3029100529100529 [2023-11-17 12:18:22,272 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 687 transitions. [2023-11-17 12:18:22,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 687 transitions. [2023-11-17 12:18:22,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:18:22,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 687 transitions. [2023-11-17 12:18:22,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 8.481481481481481) internal successors, (687), 81 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:22,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 28.0) internal successors, (2296), 82 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:22,276 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 28.0) internal successors, (2296), 82 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:22,276 INFO L175 Difference]: Start difference. First operand has 652 places, 3376 transitions, 103775 flow. Second operand 81 states and 687 transitions. [2023-11-17 12:18:22,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 731 places, 4440 transitions, 140385 flow [2023-11-17 12:18:36,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 698 places, 4440 transitions, 131153 flow, removed 3495 selfloop flow, removed 33 redundant places. [2023-11-17 12:18:36,579 INFO L231 Difference]: Finished difference. Result has 728 places, 4113 transitions, 126481 flow [2023-11-17 12:18:36,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=96154, PETRI_DIFFERENCE_MINUEND_PLACES=618, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=996, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=126481, PETRI_PLACES=728, PETRI_TRANSITIONS=4113} [2023-11-17 12:18:36,582 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 708 predicate places. [2023-11-17 12:18:36,582 INFO L495 AbstractCegarLoop]: Abstraction has has 728 places, 4113 transitions, 126481 flow [2023-11-17 12:18:36,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.681818181818182) internal successors, (125), 22 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:36,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:18:36,583 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:18:36,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-17 12:18:36,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-17 12:18:36,788 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:18:36,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:18:36,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1933354172, now seen corresponding path program 28 times [2023-11-17 12:18:36,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:18:36,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526487235] [2023-11-17 12:18:36,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:18:36,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:18:36,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:18:36,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:18:36,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:18:36,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526487235] [2023-11-17 12:18:36,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526487235] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:18:36,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027028146] [2023-11-17 12:18:36,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:18:36,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:18:36,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:18:36,895 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:18:36,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-17 12:18:36,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:18:36,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:18:36,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 12:18:36,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:18:37,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:18:37,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:18:37,162 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:18:37,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027028146] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:18:37,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:18:37,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-11-17 12:18:37,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052969085] [2023-11-17 12:18:37,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:18:37,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:18:37,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:18:37,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:18:37,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:18:37,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:18:37,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 728 places, 4113 transitions, 126481 flow. Second operand has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:37,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:18:37,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:18:37,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:19:10,862 INFO L124 PetriNetUnfolderBase]: 10071/15898 cut-off events. [2023-11-17 12:19:10,862 INFO L125 PetriNetUnfolderBase]: For 487983/487983 co-relation queries the response was YES. [2023-11-17 12:19:11,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214891 conditions, 15898 events. 10071/15898 cut-off events. For 487983/487983 co-relation queries the response was YES. Maximal size of possible extension queue 1087. Compared 111916 event pairs, 477 based on Foata normal form. 92/15990 useless extension candidates. Maximal degree in co-relation 214199. Up to 5573 conditions per place. [2023-11-17 12:19:11,129 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 2227 selfloop transitions, 2302 changer transitions 35/4564 dead transitions. [2023-11-17 12:19:11,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 803 places, 4564 transitions, 144712 flow [2023-11-17 12:19:11,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-11-17 12:19:11,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-11-17 12:19:11,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 640 transitions. [2023-11-17 12:19:11,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3007518796992481 [2023-11-17 12:19:11,131 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 640 transitions. [2023-11-17 12:19:11,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 640 transitions. [2023-11-17 12:19:11,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:19:11,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 640 transitions. [2023-11-17 12:19:11,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 8.421052631578947) internal successors, (640), 76 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:11,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 28.0) internal successors, (2156), 77 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:11,135 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 28.0) internal successors, (2156), 77 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:11,135 INFO L175 Difference]: Start difference. First operand has 728 places, 4113 transitions, 126481 flow. Second operand 76 states and 640 transitions. [2023-11-17 12:19:11,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 803 places, 4564 transitions, 144712 flow [2023-11-17 12:19:27,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 778 places, 4564 transitions, 137372 flow, removed 2826 selfloop flow, removed 25 redundant places. [2023-11-17 12:19:27,346 INFO L231 Difference]: Finished difference. Result has 796 places, 4276 transitions, 130244 flow [2023-11-17 12:19:27,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=119724, PETRI_DIFFERENCE_MINUEND_PLACES=703, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1922, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=130244, PETRI_PLACES=796, PETRI_TRANSITIONS=4276} [2023-11-17 12:19:27,349 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 776 predicate places. [2023-11-17 12:19:27,349 INFO L495 AbstractCegarLoop]: Abstraction has has 796 places, 4276 transitions, 130244 flow [2023-11-17 12:19:27,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:27,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:19:27,349 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:19:27,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-17 12:19:27,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:19:27,550 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:19:27,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:19:27,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1362060128, now seen corresponding path program 29 times [2023-11-17 12:19:27,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:19:27,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658928473] [2023-11-17 12:19:27,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:19:27,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:19:27,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:19:27,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:19:27,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:19:27,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658928473] [2023-11-17 12:19:27,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658928473] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:19:27,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479440542] [2023-11-17 12:19:27,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:19:27,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:19:27,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:19:27,658 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:19:27,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-17 12:19:27,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 12:19:27,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:19:27,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 12:19:27,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:19:27,800 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:19:27,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:19:27,933 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:19:27,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479440542] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:19:27,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:19:27,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-11-17 12:19:27,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754762483] [2023-11-17 12:19:27,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:19:27,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:19:27,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:19:27,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:19:27,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2023-11-17 12:19:27,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:19:27,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 796 places, 4276 transitions, 130244 flow. Second operand has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 23 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:27,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:19:27,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:19:27,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:19:31,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-17 12:19:49,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-17 12:20:13,517 INFO L124 PetriNetUnfolderBase]: 10760/16919 cut-off events. [2023-11-17 12:20:13,518 INFO L125 PetriNetUnfolderBase]: For 501062/501062 co-relation queries the response was YES. [2023-11-17 12:20:13,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227668 conditions, 16919 events. 10760/16919 cut-off events. For 501062/501062 co-relation queries the response was YES. Maximal size of possible extension queue 1108. Compared 118896 event pairs, 325 based on Foata normal form. 124/17043 useless extension candidates. Maximal degree in co-relation 226961. Up to 5203 conditions per place. [2023-11-17 12:20:13,809 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 634 selfloop transitions, 4242 changer transitions 13/4889 dead transitions. [2023-11-17 12:20:13,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 890 places, 4889 transitions, 153017 flow [2023-11-17 12:20:13,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-11-17 12:20:13,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2023-11-17 12:20:13,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 811 transitions. [2023-11-17 12:20:13,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30488721804511276 [2023-11-17 12:20:13,832 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 811 transitions. [2023-11-17 12:20:13,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 811 transitions. [2023-11-17 12:20:13,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:20:13,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 811 transitions. [2023-11-17 12:20:13,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 8.536842105263158) internal successors, (811), 95 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:13,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 28.0) internal successors, (2688), 96 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:13,854 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 28.0) internal successors, (2688), 96 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:13,854 INFO L175 Difference]: Start difference. First operand has 796 places, 4276 transitions, 130244 flow. Second operand 95 states and 811 transitions. [2023-11-17 12:20:13,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 890 places, 4889 transitions, 153017 flow [2023-11-17 12:20:31,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 866 places, 4889 transitions, 151809 flow, removed 462 selfloop flow, removed 24 redundant places. [2023-11-17 12:20:31,745 INFO L231 Difference]: Finished difference. Result has 879 places, 4656 transitions, 150164 flow [2023-11-17 12:20:31,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=128934, PETRI_DIFFERENCE_MINUEND_PLACES=772, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3861, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=150164, PETRI_PLACES=879, PETRI_TRANSITIONS=4656} [2023-11-17 12:20:31,748 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 859 predicate places. [2023-11-17 12:20:31,748 INFO L495 AbstractCegarLoop]: Abstraction has has 879 places, 4656 transitions, 150164 flow [2023-11-17 12:20:31,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 23 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:31,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:20:31,748 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:20:31,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-17 12:20:31,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:20:31,949 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:20:31,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:20:31,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1686574110, now seen corresponding path program 30 times [2023-11-17 12:20:31,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:20:31,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804352690] [2023-11-17 12:20:31,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:20:31,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:20:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:20:32,051 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:20:32,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:20:32,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804352690] [2023-11-17 12:20:32,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804352690] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:20:32,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806658759] [2023-11-17 12:20:32,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:20:32,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:20:32,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:20:32,052 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:20:32,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-17 12:20:32,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:20:32,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:20:32,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 12:20:32,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:20:32,180 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:20:32,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:20:32,303 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:20:32,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806658759] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:20:32,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:20:32,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2023-11-17 12:20:32,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378423813] [2023-11-17 12:20:32,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:20:32,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:20:32,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:20:32,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:20:32,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:20:32,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:20:32,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 879 places, 4656 transitions, 150164 flow. Second operand has 20 states, 20 states have (on average 5.75) internal successors, (115), 20 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:32,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:20:32,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:20:32,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:20:53,313 INFO L124 PetriNetUnfolderBase]: 11180/17637 cut-off events. [2023-11-17 12:20:53,313 INFO L125 PetriNetUnfolderBase]: For 550876/550876 co-relation queries the response was YES. [2023-11-17 12:20:53,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249761 conditions, 17637 events. 11180/17637 cut-off events. For 550876/550876 co-relation queries the response was YES. Maximal size of possible extension queue 1162. Compared 125674 event pairs, 602 based on Foata normal form. 24/17661 useless extension candidates. Maximal degree in co-relation 249011. Up to 6384 conditions per place. [2023-11-17 12:20:53,697 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 2816 selfloop transitions, 2284 changer transitions 0/5100 dead transitions. [2023-11-17 12:20:53,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 941 places, 5100 transitions, 169964 flow [2023-11-17 12:20:53,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-17 12:20:53,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-11-17 12:20:53,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 540 transitions. [2023-11-17 12:20:53,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30612244897959184 [2023-11-17 12:20:53,698 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 540 transitions. [2023-11-17 12:20:53,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 540 transitions. [2023-11-17 12:20:53,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:20:53,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 540 transitions. [2023-11-17 12:20:53,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 8.571428571428571) internal successors, (540), 63 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 12:20:53,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 28.0) internal successors, (1792), 64 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:53,701 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 28.0) internal successors, (1792), 64 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:53,701 INFO L175 Difference]: Start difference. First operand has 879 places, 4656 transitions, 150164 flow. Second operand 63 states and 540 transitions. [2023-11-17 12:20:53,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 941 places, 5100 transitions, 169964 flow [2023-11-17 12:21:16,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 906 places, 5100 transitions, 167308 flow, removed 1155 selfloop flow, removed 35 redundant places. [2023-11-17 12:21:16,698 INFO L231 Difference]: Finished difference. Result has 916 places, 4841 transitions, 158524 flow [2023-11-17 12:21:16,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=147666, PETRI_DIFFERENCE_MINUEND_PLACES=844, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=158524, PETRI_PLACES=916, PETRI_TRANSITIONS=4841} [2023-11-17 12:21:16,701 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 896 predicate places. [2023-11-17 12:21:16,701 INFO L495 AbstractCegarLoop]: Abstraction has has 916 places, 4841 transitions, 158524 flow [2023-11-17 12:21:16,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.75) internal successors, (115), 20 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:21:16,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:21:16,702 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:21:16,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-17 12:21:16,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-17 12:21:16,902 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:21:16,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:21:16,903 INFO L85 PathProgramCache]: Analyzing trace with hash 164888700, now seen corresponding path program 31 times [2023-11-17 12:21:16,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:21:16,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409889507] [2023-11-17 12:21:16,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:21:16,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:21:16,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:21:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:21:17,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:21:17,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409889507] [2023-11-17 12:21:17,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409889507] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:21:17,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955331176] [2023-11-17 12:21:17,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:21:17,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:21:17,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:21:17,002 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:21:17,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-17 12:21:17,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:21:17,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 12:21:17,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:21:17,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:21:17,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:21:17,260 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:21:17,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955331176] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:21:17,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:21:17,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 22 [2023-11-17 12:21:17,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702504637] [2023-11-17 12:21:17,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:21:17,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 12:21:17,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:21:17,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 12:21:17,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-11-17 12:21:17,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:21:17,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 916 places, 4841 transitions, 158524 flow. Second operand has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 22 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:21:17,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:21:17,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:21:17,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:21:19,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-17 12:21:50,653 INFO L124 PetriNetUnfolderBase]: 13591/21704 cut-off events. [2023-11-17 12:21:50,654 INFO L125 PetriNetUnfolderBase]: For 847109/847109 co-relation queries the response was YES. [2023-11-17 12:21:50,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314105 conditions, 21704 events. 13591/21704 cut-off events. For 847109/847109 co-relation queries the response was YES. Maximal size of possible extension queue 1467. Compared 163587 event pairs, 1538 based on Foata normal form. 200/21904 useless extension candidates. Maximal degree in co-relation 313379. Up to 12214 conditions per place. [2023-11-17 12:21:51,084 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 3267 selfloop transitions, 2673 changer transitions 104/6044 dead transitions. [2023-11-17 12:21:51,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 982 places, 6044 transitions, 210230 flow [2023-11-17 12:21:51,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-17 12:21:51,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-11-17 12:21:51,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 543 transitions. [2023-11-17 12:21:51,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2894456289978678 [2023-11-17 12:21:51,085 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 543 transitions. [2023-11-17 12:21:51,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 543 transitions. [2023-11-17 12:21:51,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:21:51,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 543 transitions. [2023-11-17 12:21:51,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 8.104477611940299) internal successors, (543), 67 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:21:51,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 28.0) internal successors, (1904), 68 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:21:51,088 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 28.0) internal successors, (1904), 68 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:21:51,088 INFO L175 Difference]: Start difference. First operand has 916 places, 4841 transitions, 158524 flow. Second operand 67 states and 543 transitions. [2023-11-17 12:21:51,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 982 places, 6044 transitions, 210230 flow [2023-11-17 12:22:27,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 960 places, 6044 transitions, 208455 flow, removed 646 selfloop flow, removed 22 redundant places. [2023-11-17 12:22:27,764 INFO L231 Difference]: Finished difference. Result has 979 places, 5569 transitions, 192791 flow [2023-11-17 12:22:27,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=155889, PETRI_DIFFERENCE_MINUEND_PLACES=894, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4798, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1962, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=192791, PETRI_PLACES=979, PETRI_TRANSITIONS=5569} [2023-11-17 12:22:27,767 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 959 predicate places. [2023-11-17 12:22:27,767 INFO L495 AbstractCegarLoop]: Abstraction has has 979 places, 5569 transitions, 192791 flow [2023-11-17 12:22:27,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 22 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:27,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:22:27,767 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:22:27,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-17 12:22:27,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-17 12:22:27,972 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:22:27,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:22:27,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1641359932, now seen corresponding path program 32 times [2023-11-17 12:22:27,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:22:27,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480383089] [2023-11-17 12:22:27,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:22:27,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:22:27,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:22:28,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:22:28,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:22:28,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480383089] [2023-11-17 12:22:28,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480383089] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:22:28,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036756015] [2023-11-17 12:22:28,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:22:28,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:22:28,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:22:28,092 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:22:28,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-17 12:22:28,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:22:28,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:22:28,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 12:22:28,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:22:28,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:22:28,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:22:28,358 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:22:28,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036756015] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:22:28,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:22:28,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2023-11-17 12:22:28,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135319180] [2023-11-17 12:22:28,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:22:28,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:22:28,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:22:28,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:22:28,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:22:28,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:22:28,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 979 places, 5569 transitions, 192791 flow. Second operand has 20 states, 20 states have (on average 5.75) internal successors, (115), 20 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:28,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:22:28,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:22:28,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:23:02,100 INFO L124 PetriNetUnfolderBase]: 14623/23500 cut-off events. [2023-11-17 12:23:02,100 INFO L125 PetriNetUnfolderBase]: For 955384/955384 co-relation queries the response was YES. [2023-11-17 12:23:02,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351140 conditions, 23500 events. 14623/23500 cut-off events. For 955384/955384 co-relation queries the response was YES. Maximal size of possible extension queue 1580. Compared 180883 event pairs, 2646 based on Foata normal form. 34/23534 useless extension candidates. Maximal degree in co-relation 350447. Up to 18064 conditions per place. [2023-11-17 12:23:02,747 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 5031 selfloop transitions, 1327 changer transitions 2/6360 dead transitions. [2023-11-17 12:23:02,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1064 places, 6360 transitions, 228276 flow [2023-11-17 12:23:02,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-11-17 12:23:02,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2023-11-17 12:23:02,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 735 transitions. [2023-11-17 12:23:02,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30523255813953487 [2023-11-17 12:23:02,749 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 735 transitions. [2023-11-17 12:23:02,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 735 transitions. [2023-11-17 12:23:02,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:23:02,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 735 transitions. [2023-11-17 12:23:02,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 8.546511627906977) internal successors, (735), 86 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:02,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 28.0) internal successors, (2436), 87 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:02,752 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 28.0) internal successors, (2436), 87 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:02,752 INFO L175 Difference]: Start difference. First operand has 979 places, 5569 transitions, 192791 flow. Second operand 86 states and 735 transitions. [2023-11-17 12:23:02,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1064 places, 6360 transitions, 228276 flow [2023-11-17 12:23:47,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1035 places, 6360 transitions, 225760 flow, removed 944 selfloop flow, removed 29 redundant places. [2023-11-17 12:23:47,518 INFO L231 Difference]: Finished difference. Result has 1051 places, 5898 transitions, 205529 flow [2023-11-17 12:23:47,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=190304, PETRI_DIFFERENCE_MINUEND_PLACES=950, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1041, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=205529, PETRI_PLACES=1051, PETRI_TRANSITIONS=5898} [2023-11-17 12:23:47,523 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 1031 predicate places. [2023-11-17 12:23:47,523 INFO L495 AbstractCegarLoop]: Abstraction has has 1051 places, 5898 transitions, 205529 flow [2023-11-17 12:23:47,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.75) internal successors, (115), 20 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:47,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:23:47,523 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:23:47,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-11-17 12:23:47,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-17 12:23:47,727 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:23:47,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:23:47,728 INFO L85 PathProgramCache]: Analyzing trace with hash -808978846, now seen corresponding path program 33 times [2023-11-17 12:23:47,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:23:47,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332918201] [2023-11-17 12:23:47,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:23:47,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:23:47,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:23:47,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:23:47,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:23:47,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332918201] [2023-11-17 12:23:47,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332918201] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:23:47,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308013291] [2023-11-17 12:23:47,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:23:47,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:23:47,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:23:47,872 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:23:47,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-17 12:23:47,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:23:47,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:23:47,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 12:23:47,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:23:48,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:23:48,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:23:48,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:23:48,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308013291] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:23:48,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:23:48,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-11-17 12:23:48,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449213614] [2023-11-17 12:23:48,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:23:48,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 12:23:48,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:23:48,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 12:23:48,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-11-17 12:23:48,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2023-11-17 12:23:48,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1051 places, 5898 transitions, 205529 flow. Second operand has 22 states, 22 states have (on average 5.681818181818182) internal successors, (125), 22 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:48,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:23:48,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2023-11-17 12:23:48,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:24:54,544 INFO L124 PetriNetUnfolderBase]: 15806/25489 cut-off events. [2023-11-17 12:24:54,544 INFO L125 PetriNetUnfolderBase]: For 1093378/1093378 co-relation queries the response was YES. [2023-11-17 12:24:55,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 384685 conditions, 25489 events. 15806/25489 cut-off events. For 1093378/1093378 co-relation queries the response was YES. Maximal size of possible extension queue 1714. Compared 199338 event pairs, 2463 based on Foata normal form. 80/25569 useless extension candidates. Maximal degree in co-relation 383965. Up to 17943 conditions per place. [2023-11-17 12:24:55,354 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 4849 selfloop transitions, 1855 changer transitions 38/6742 dead transitions. [2023-11-17 12:24:55,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1138 places, 6742 transitions, 245731 flow [2023-11-17 12:24:55,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-11-17 12:24:55,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2023-11-17 12:24:55,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 728 transitions. [2023-11-17 12:24:55,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29545454545454547 [2023-11-17 12:24:55,356 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 728 transitions. [2023-11-17 12:24:55,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 728 transitions. [2023-11-17 12:24:55,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:24:55,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 728 transitions. [2023-11-17 12:24:55,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 8.272727272727273) internal successors, (728), 88 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:55,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 28.0) internal successors, (2492), 89 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:55,359 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 28.0) internal successors, (2492), 89 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:24:55,359 INFO L175 Difference]: Start difference. First operand has 1051 places, 5898 transitions, 205529 flow. Second operand 88 states and 728 transitions. [2023-11-17 12:24:55,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1138 places, 6742 transitions, 245731 flow Received shutdown request... [2023-11-17 12:24:56,679 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 12:24:56,679 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 12:24:56,743 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-17 12:24:56,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-17 12:24:56,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-17 12:24:56,948 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-11-17 12:24:56,949 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-17 12:24:56,949 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-17 12:24:56,950 INFO L445 BasicCegarLoop]: Path program histogram: [33, 6, 1] [2023-11-17 12:24:56,952 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 12:24:56,952 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 12:24:56,953 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 12:24:56 BasicIcfg [2023-11-17 12:24:56,953 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 12:24:56,954 INFO L158 Benchmark]: Toolchain (without parser) took 549143.51ms. Allocated memory was 310.4MB in the beginning and 4.0GB in the end (delta: 3.7GB). Free memory was 263.3MB in the beginning and 1.0GB in the end (delta: -743.5MB). Peak memory consumption was 2.9GB. Max. memory is 8.0GB. [2023-11-17 12:24:56,954 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 188.7MB. Free memory is still 135.5MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 12:24:56,954 INFO L158 Benchmark]: CACSL2BoogieTranslator took 167.39ms. Allocated memory is still 310.4MB. Free memory was 263.3MB in the beginning and 251.8MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-11-17 12:24:56,954 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.06ms. Allocated memory is still 310.4MB. Free memory was 251.8MB in the beginning and 250.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-11-17 12:24:56,954 INFO L158 Benchmark]: Boogie Preprocessor took 13.83ms. Allocated memory is still 310.4MB. Free memory was 250.2MB in the beginning and 248.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 12:24:56,954 INFO L158 Benchmark]: RCFGBuilder took 325.42ms. Allocated memory is still 310.4MB. Free memory was 248.6MB in the beginning and 224.5MB in the end (delta: 24.1MB). Peak memory consumption was 24.1MB. Max. memory is 8.0GB. [2023-11-17 12:24:56,954 INFO L158 Benchmark]: TraceAbstraction took 548611.07ms. Allocated memory was 310.4MB in the beginning and 4.0GB in the end (delta: 3.7GB). Free memory was 223.4MB in the beginning and 1.0GB in the end (delta: -783.4MB). Peak memory consumption was 2.9GB. Max. memory is 8.0GB. [2023-11-17 12:24:56,955 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 188.7MB. Free memory is still 135.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 167.39ms. Allocated memory is still 310.4MB. Free memory was 263.3MB in the beginning and 251.8MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 21.06ms. Allocated memory is still 310.4MB. Free memory was 251.8MB in the beginning and 250.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 13.83ms. Allocated memory is still 310.4MB. Free memory was 250.2MB in the beginning and 248.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 325.42ms. Allocated memory is still 310.4MB. Free memory was 248.6MB in the beginning and 224.5MB in the end (delta: 24.1MB). Peak memory consumption was 24.1MB. Max. memory is 8.0GB. * TraceAbstraction took 548611.07ms. Allocated memory was 310.4MB in the beginning and 4.0GB in the end (delta: 3.7GB). Free memory was 223.4MB in the beginning and 1.0GB in the end (delta: -783.4MB). Peak memory consumption was 2.9GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.2s, 25 PlacesBefore, 20 PlacesAfterwards, 20 TransitionsBefore, 15 TransitionsAfterwards, 110 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 4 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 5 TotalNumberOfCompositions, 135 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 131, independent: 129, independent conditional: 0, independent unconditional: 129, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 69, independent: 67, independent conditional: 0, independent unconditional: 67, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 69, independent: 67, independent conditional: 0, independent unconditional: 67, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 11, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 131, independent: 62, independent conditional: 0, independent unconditional: 62, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 69, unknown conditional: 0, unknown unconditional: 69] , Statistics on independence cache: Total cache size (in pairs): 24, Positive cache size: 24, Positive conditional cache size: 0, Positive unconditional cache size: 24, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 34 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 548.5s, OverallIterations: 40, TraceHistogramMax: 4, PathProgramHistogramMax: 33, EmptinessCheckTime: 0.0s, AutomataDifference: 529.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.3s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 3771 SdHoareTripleChecker+Valid, 28.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3771 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 26.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 972 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 24178 IncrementalHoareTripleChecker+Invalid, 25152 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 972 mSolverCounterUnsat, 0 mSDtfsCounter, 24178 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2658 GetRequests, 1132 SyntacticMatches, 69 SemanticMatches, 1457 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26370 ImplicationChecksByTransitivity, 106.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=205529occurred in iteration=39, InterpolantAutomatonStates: 1249, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 8.7s InterpolantComputationTime, 1329 NumberOfCodeBlocks, 1307 NumberOfCodeBlocksAsserted, 122 NumberOfCheckSat, 1854 ConstructedInterpolants, 0 QuantifiedInterpolants, 11399 SizeOfPredicates, 54 NumberOfNonLiveVariables, 4781 ConjunctsInSsa, 484 ConjunctsInUnsatCore, 112 InterpolantComputations, 5 PerfectInterpolantSequences, 121/966 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown